Leave the repairs and renovations of condominiums and apartments in Saiwai, Kawasaki City to Kakeru Koumuten Co., Ltd.!
Large-Scale Renovations for Condominiums, Apartments, and Buildings in Kawasaki City, Saiwai Ward
To owners, management associations, and management companies considering large-scale renovations for condominiums, apartments, and buildings in Kawasaki City, Saiwai Ward.
Kakeru Koumuten Co., Ltd. is a renovation company that handles everything from the installation of temporary scaffolding to substrate repairs, exterior painting, tile repairs, sealing, waterproofing for roofs and balconies, and roof work, all managed and executed by our own team. Based in Yokohama City, we have undertaken numerous large-scale renovations and exterior reforms for apartments, condominiums, and commercial facilities in Saiwai Ward.
- On-site surveys and estimates are completely free (we welcome competitive estimates)
- All management from temporary scaffolding to exterior and roof work is handled in-house
- We confirm site conditions and delivery routes on-site, and plan scaffolding from our own team
- Consultations for partial repairs or emergency measures for leaks are also possible
- Cost Estimate / For condominiums, the cost is approximately 750,000 to 1,500,000 yen per unit (according to the Ministry of Land, Infrastructure, Transport and Tourism’s survey for the fiscal year 2021, about 70% fall within this range, with the most common being 1,000,000 to 1,250,000 yen. This amount excludes consumption tax and common temporary costs). For wooden apartments, the estimate is 2,000,000 to 4,000,000 yen per building.
- Estimated Cycle / 12 to 15 years. However, the determining factor is not the number of years but the condition of deterioration.
- Particularly Relevant in Saiwai Ward / This area is a flat lowland surrounded by the Tama River, Tsurumi River, and Yagami River, with a mix of large collective housing built on former factory sites and residential areas near Kaseyama. Planning for scaffolding and protection in densely built sites, consensus building for large collective housing with many buildings, and escape routes for water in preparation for heavy rain and storm surges (roof drains and drainage) are common discussion points, and there are sites subject to landscape planning and district planning.
- Available Funding / There are no subsidies specifically for large-scale renovations, but if requirements are met, there is a 50% reduction in fixed asset tax (for work completed by the end of March in Reiwa 9), and national subsidies and public financing may be available if windows and insulation are included.
- Tips for Success / At least three competitive estimates. Compare not only the amounts but also the quantities, methods, and materials.
Large-scale repair work that can be handled in Saiwai Ward, Kawasaki City
Large-scale repairs are not just “exterior wall painting” or “waterproofing,” but rather a comprehensive repair of the entire building while scaffolding is set up. At Kakeru Koumuten, we can handle all of the following work in-house, ensuring clear responsibility and coordination of the process.
| Type of Work | Main Content |
|---|---|
| Temporary Scaffolding Work | Installed by our own scaffolding team using our own scaffolding materials. We handle mesh sheets, protection, and fall prevention measures. |
| Substrate Repair Work | Crack repairs, injection of floating mortar and tiles, explosion (exposed rebar) repairs, resin mortar repairs for missing parts. |
| Exterior Wall Painting Work | High-pressure washing, three coats from primer to topcoat, painting of auxiliary parts (iron parts, gutters, water cut-offs, etc.). We accommodate radical control type, fluorine, and inorganic paints. |
| Tile Repair Work | Replacement of damaged tiles, joint repairs, clear waterproofing of tile surfaces (such as Seven S). |
| Sealing Work | Replacement and additional application of seals around sashes and exterior wall joints. |
| Waterproofing Work | Urethane waterproofing for rooftops, roof balconies, shared corridors, and stairs, PVC sheet waterproofing, and installation of long sheets. |
| Roof Work | Roof painting, roof overlay (cover method), re-roofing, and ridge cap replacement. We have sheet metal craftsmen on staff and can handle large roofs such as factories. |
| Iron and Hardware Work | Surface painting of steel stairs, handrails, and PS doors, replacement of coping and water cut-offs. |
| Drainage and Wastewater Work | Cleaning and renovation of roof drains (inserting renovation drains), resolving gutter clogs. This work is particularly important to prevent puddles and leaks on rooftops and to ensure drainage during heavy rain. |
| Others | Replacement of rain gutters, rooftop and exterior wall inspections using drones, leak investigations using thermography, and preliminary surveys of asbestos-containing materials. |
Scope of Major Repairs Determined from Building Diagnosis
It is not guaranteed that all of the above works will be performed. The extent of the work will be determined based on the results of the building diagnosis. At Kakeru Koumuten, we conduct free on-site surveys to confirm the following and summarize them in a deterioration diagnosis report with photos, after which we will propose the scope of work.
| Diagnosis Area | Main Investigation Method | Scope of Work Determined by Diagnosis Results |
|---|---|---|
| Exterior Wall (Painted Surface) | Visual inspection, checking the width of cracks and the condition of the paint film | Methods and quantities for crack repair, specifications for painting (whether to repaint or paint after removing the existing paint film) |
| Exterior Wall (Tile Surface) | Sounding investigation. High areas checked with a drone | Scope and estimated quantity for injection and replacement, whether clear waterproofing is necessary |
| Sealing | Checking for cracks, shrinkage, peeling, and hardening | Whether to replace or add to the existing joints, scope of joints to be worked on |
| Roof, Balcony, Shared Corridor | Checking for blisters or breaks in the waterproof layer, puddles, and the condition of drains | Full renovation or partial repair, method (urethane waterproofing, PVC sheet waterproofing, long sheet), whether drain renovation is necessary |
| Leak Areas | Investigation using thermal imaging camera and drone | Identification of the cause and the priority areas for repair |
| Metal Parts, Roof, Accessories | Checking for rust, corrosion, lifting, and cracking | Whether it can be resolved with painting or if component replacement or overlay installation is necessary |
| Site and Surroundings | Checking trees, delivery routes, parking, and distance to neighboring properties | Planning for scaffolding and the scope of temporary construction |
Reasons Kakeru Koumuten is Chosen for Large-Scale Repairs in Kawasaki City, Saiwai Ward
The reason why we can take on large-scale repairs in Saiwai Ward is partly because “Kakeru Koumuten has a base in Yokohama City”, but also due to our “unique initiatives in large-scale repair work that cannot be imitated by other companies”, which have received high praise from many customers.
1. Equipment Specialized for Exterior Renovations
At Kakeru Koumuten, we have prepared the following warehouses and material storage areas to provide low-cost, high-quality exterior wall painting and waterproofing work for large-scale repairs. We have established five bases centered around Yokohama City for material storage and showrooms.
In-house Scaffolding Materials
We own the scaffolding materials necessary for temporary scaffolding required for large-scale repairs and can assemble the scaffolding ourselves.
By performing scaffolding work with our own scaffolding team instead of outsourcing, we can cut costs on scaffolding work and provide quick and flexible responses.
We have approximately enough scaffolding materials for 100 single-family homes!
Storage of Materials in Our Large In-house Warehouse
We store paints and substrate repair materials used for exterior renovations. By ordering a large quantity of materials at once, we can procure materials at a lower cost! Additionally, we always have stock available, enabling rapid responses in emergencies!
In-house Waste Sorting
Large-scale repairs generate various waste materials such as leftover paint, metal, and wood. At Kakeru Koumuten, we sort and recycle waste materials in-house, leading to cost reductions in waste disposal.
Showroom Dedicated to Exterior Renovations
In the showroom, you can not only have meetings but also check actual samples and colors of exterior materials. Color simulations for exterior wall painting and heat resistance tests using a heat resistance testing machine are also available!
2. Cost Reduction through In-House Management and Construction
One of Kakeru Koumuten’s major strengths is in-house management and construction.
From inquiry to project completion, everything is managed by Kakeru Koumuten in a consistent system, allowing for high-quality large-scale repairs at reduced costs. Additionally, one representative will handle everything from the estimate to project completion. Since the same person is responsible for sales and construction management, smooth communication is possible.
We can handle everything from temporary scaffolding installation to exterior wall painting, substrate repairs, waterproofing, and tile repairs with complete in-house construction! Those with specialized knowledge and experience will conduct inspections and actual construction for each process!
3. Various Permits and Skilled Workers
We have obtained construction industry licenses and permits for industrial waste collection and transportation! We also have nationally certified sheet metal and painting skilled workers, and we are confident in our construction techniques. We can also handle large-scale roofing work for factories! We have qualified personnel for asbestos work supervisors and building asbestos-containing material investigators, so we can handle and conduct preliminary investigations of asbestos-containing roofing materials.
4. Warranty and Aftercare
Large-scale repair work comes with warranties for most projects, including “painting work,” “substrate repair work,” and “waterproofing work”!
Aftercare is available every year, and we send out notification DM every year.
5. Flexible and Prompt Response
Our company is equipped to handle various troubles and situations related to apartments and condominiums.
We can address exterior walls and rooftops that cannot be inspected from high places using drones! During rain leak investigations, we can also use a thermal imaging camera, which helps in identifying the cause of leaks!
We will respond according to your wishes. We also accept emergency measures for sudden rain leaks! We will promptly respond to urgent requests!
6. Human Resource Development
Our staff create various models to improve their skills and conduct practical training. Since different processing and techniques are required at each site, we regularly provide skill enhancement education to ensure each staff member can respond appropriately. We also educate on points to be cautious about and areas to check during each phase of large-scale repair work.
7. Consideration for Residents and Neighbors
During large-scale repair work, we notify residents and visit neighbors to greet and explain the situation, and we set up notice boards at entrances to display progress charts and announcements! Additionally, we ensure proper etiquette for visitors to minimize inconvenience to residents and neighbors.
8. Thorough Quality Control
Each phase undergoes inspection by a responsible person, along with detailed photographs of the work. We use film thickness inspection equipment and check sheets to ensure that no inspections are overlooked. During exterior wall painting and waterproofing work, we check the quantity of used paint cans to confirm that the specified amount of paint is used, and we prevent construction defects by ordering paint in-house. Of course, we also take photographs of used paint and report them.
9. Color Simulation for Exterior Wall Painting
9-1 Self Color Simulation
The simulations created by our company can be done using photos of your actual apartment or building!You can also perform simulations on your smartphone or computer. By doing a simulation before changing to a two-tone color or making an image change, we hope to help enhance the stylish appearance and increase occupancy rates! Of course, we can also arrange paint samples for actual color confirmation.
*There are areas in Saiwai Ward where building agreements and district plans are established, and the color of the exterior walls may need to harmonize with the surroundings. Having a color simulation screen will help facilitate explanations at community meetings and general meetings.
9-2 Confirm the actual color with a trial paint!
You can order samples of the paint you are considering and perform trial painting on your exterior wall. By conducting a trial paint, you can confirm the actual color and gloss!
9-3 Exterior renovation simulation
We can also perform the following exterior simulations for apartments and condominiums!
・Exterior wall color simulation (two-tone color is also possible)
・Simulation for when metal siding is applied
・Simulation using accent materials such as cornices and louvers
・Simulation for roof painting and roof replacement work
With the exterior renovation simulation, you can minimize the risk of failure in image changes! We hope that by renovating the appearance of apartments and condominiums, it will help increase occupancy rates.
Estimated costs for large-scale repairs in Saiwai Ward, Kawasaki City
The cost of large-scale repairs varies significantly depending on the size of the building, its condition, the scope of work, and the materials used. First, please refer to the national average based on public statistics, followed by our company’s estimates based on past performance, and finally, examples of unit prices for each project.
The national average for condominiums is 750,000 to 1,500,000 yen per unit
According to a survey conducted by the Ministry of Land, Infrastructure, Transport and Tourism, which compiled 818 construction cases (FY 2021), approximately 70% of the costs for large-scale repairs are concentrated in the range of 750,000 to 1,500,000 yen per unit, with the most common price range being 1,000,000 to 1,250,000 yen. Please note that the amounts in this survey do not include consumption tax and common temporary construction costs, so they differ from the current total project costs including tax.
| Construction cost per unit | Percentage | Construction cost per unit | Percentage |
|---|---|---|---|
| Up to 750,000 yen | 15.1% | 1,250,000 to 1,500,000 yen | 17.4% |
| 750,000 to 1,000,000 yen | 24.7% | 1,500,000 to 2,000,000 yen | 9.1% |
| 1,000,000 to 1,250,000 yen | 27.0% (most common) | Over 2,000,000 yen | 2.8% |
Source: Ministry of Land, Infrastructure, Transport and Tourism “FY 2021 Survey on Large-Scale Repair Work for Condominiums” (200 companies, 818 cases) *The amounts do not include consumption tax or common temporary construction costs. The percentages do not total 100% due to rounding and non-responses.
Breakdown of construction costs (what the money is spent on)
| Category | Composition Ratio | Main Contents |
|---|---|---|
| Construction-related work | 60.3% | About half for exterior walls, about one-third for waterproofing. Substrate repairs, tiles, painting, waterproofing |
| Temporary construction | 22.8% | Scaffolding, mesh sheets, protective coverings, etc. (does not include common temporary construction costs) |
| Miscellaneous expenses | 10.3% | Site management costs, general management costs, statutory welfare costs, etc. (9.5%), insurance premiums for large-scale repair defect insurance (0.8%) |
Source: Ministry of Land, Infrastructure, Transport and Tourism “FY 2021 Survey on Large-Scale Repair Work for Condominiums” (second survey of large-scale repair work. The overall average is construction-related 59.0%, temporary construction 22.3%, miscellaneous expenses 9.9%). *The total does not equal 100% because equipment-related work, exterior work, and others are included. This is an average value and not a criterion for judging the appropriateness of individual estimates.
Cost Estimates by Building Size (Scaffolding, Substrate Repair, Exterior Painting, Waterproofing, Sealing Set)
| Type and Size of Building | Cost Estimate | Estimated Construction Period |
|---|---|---|
| Wooden Apartment (2 stories, 6-10 units) | 2,000,000 – 4,000,000 JPY | 3 – 5 weeks |
| Steel Frame / RC Apartment (3 stories, 10-20 units) | 4,000,000 – 9,000,000 JPY | 1 – 2 months |
| Mixed-Use Building / Small Apartment (4-5 stories) | 5,000,000 – 15,000,000 JPY | 1.5 – 3 months |
| Medium-Sized Apartment (30-50 units) | 20,000,000 – 50,000,000 JPY | 3 – 5 months |
| Large Apartment (over 100 units) | Around 100,000,000 JPY – | 6 months – |
*The above is an estimate based on Kakeru Koumuten’s construction results and may vary depending on the presence of roofing work, metal work, plumbing, etc. For apartments, please also consider the amount obtained by multiplying the national statistics above (750,000 – 1,500,000 JPY per unit) by the number of units as a guideline.
Breakdown of Costs for Temporary Structures, Substrate Repair, Exterior Walls, and Waterproofing
The estimate for large-scale repairs is broadly divided into “Temporary Structures,” “Substrate Repair,” “Sealing,” “Exterior Painting,” “Waterproofing,” and “Miscellaneous Expenses.” Before comparing total amounts, please check what each item includes, how much, and at what cost.
| Item | What to Confirm in the Estimate |
|---|---|
| Building Prerequisites | Structure (wooden, steel frame, RC), number of floors, number of units, exterior wall area & waterproof area. Also confirm whether the area is based on drawings or actual measurements. |
| Common Temporary Facilities & Scaffolding | Area and unit price of scaffolding, mesh sheets & protection, temporary toilets, etc. According to the Ministry of Land, Infrastructure, Transport and Tourism’s survey for Reiwa 3, temporary works such as scaffolding account for about 20% of construction costs (excluding common temporary costs). |
| Substrate Repair | Cracks, lifting, spalling, etc., quantity and unit price for each repair method. Since this item is not confirmed until scaffolding is set up, confirm whether it will be estimated quantity or actual settlement, and the settlement method if the quantity increases or decreases. |
| Sealing | Whether it is a replacement or additional sealing, length to be installed (m), material name. |
| Exterior Wall Painting | Painting area (㎡), manufacturer name, product name, grade of paint, number of coats, scope of ancillary parts. |
| Waterproofing | Area by part such as rooftop, balcony, common corridor, construction method, material name, and whether drain renovation is included. |
| Inspection & Reporting | Inspections for each process, construction photos, whether completion reports and warranty documents are included. |
| Miscellaneous Expenses | Contents and ratios of site management costs, general management costs, statutory welfare costs, etc. According to the Ministry of Land, Infrastructure, Transport and Tourism’s survey for Reiwa 3, the average is about 10% of construction costs, but it varies depending on the size and conditions of the building, so there is no uniform standard. |
| Tax Classification | Whether the amount is tax-inclusive or tax-exclusive. Since the display varies by company, always align before comparing total amounts. |
Unit Price Examples for Repair Work
| Repair Method | Materials Used | Cost |
|---|---|---|
| Tile Replacement | Existing Similar Tiles | per sheet / 2,000 JPY〜4,000 JPY |
| Repair of Floating Tile and Mortar Areas | Epoxy Resin Injection | per square meter / 3,000 JPY〜5,000 JPY （Varies depending on the degree） |
| Tile Joint Mortar Repair | Mortar for Tile Joints | per square meter / 1,000 JPY〜2,000 JPY （Varies depending on the degree） |
| Concrete Spalling Repair | Rust Preventive for Rebar + Resin Mortar | per location / 1,000 JPY〜2,000 JPY （Varies depending on the degree） |
| Crack Repair | Filler or Polymer Cement | per meter / 100 JPY〜2,500 JPY （Varies depending on the degree） |
| Exterior Wall Painting (3 Coats) | Radical Control Silicone Paint | per square meter / 2,500 JPY〜3,500 JPY |
| Roof Top Urethane Waterproofing (Ventilated Cushion Method) | High Strength Urethane | per square meter / 6,500 JPY〜9,500 JPY |
| Sealant Replacement | Modified Silicone | per meter / 900 JPY〜1,500 JPY |
| Temporary Scaffolding | Company-Owned Scaffolding Materials (Wedge Type) | per square meter / 700 JPY〜1,000 JPY |
*Costs and warranty periods vary based on shape, quantity, substrate condition, and type of materials. If you would like a detailed estimate, please feel free to contact us. Estimates are completely free.
Select Paint and Waterproofing Grades Based on “Years Until Next Repair”
“Good paint = correct” is not always true. The best way to choose is to align when the next major repair will be with the lifespan of the materials, minimizing waste.
| Grade | Estimated Lifespan | Suitable Cases |
|---|---|---|
| Silicone / Radical Control Type | 10 to 16 years | Buildings that are cycled every 12 to 15 years. A good choice balancing cost and performance. The lifespan varies by product, so choose specifications that match the cycle. |
| Fluorine | 16 to 20 years | Buildings that want to set the next repair after 15 years, high-rise or complex-shaped buildings where scaffolding costs are high. |
| Inorganic | 18 to 22 years | Buildings that want to reduce dirt adhesion. Consider this for locations prone to dirt, such as along busy roads, to ensure longevity. |
| Urethane Waterproofing (Rooftop) | 8 to 15 years | Rooftops with complex shapes, when wanting to renovate while utilizing the existing waterproof layer. Mid-term inspections and repairs, such as re-coating the top coat, are prerequisites. |
| Vinyl Sheet Waterproofing | 20 to 25 years | Rooftops with a large area and simple shapes. The construction period is short. |
| Asphalt Waterproofing | 15 to 20 years | Rooftops planned for long cycles. The cost per instance will increase. |
* The estimated lifespan is a general guideline and may vary depending on sunlight, location, and substrate condition. The rate of deterioration differs for each side due to location, sunlight, and ventilation, so confirming the condition of each side through on-site investigation and selecting paint suitable for the location will affect longevity.
Guideline for Repair Reserve Funds and Options When Insufficient
The Ministry of Land, Infrastructure, Transport and Tourism guidelines indicate the guideline for repair reserve funds as a monthly amount per exclusive area. Additional charges are necessary if there is a mechanical parking lot.
| Building Scale (Less than 20 Stories) | Monthly Guideline (Average) | Range Where Two-Thirds of Cases Fit | Conversion for 70㎡ |
|---|---|---|---|
| Building Total Floor Area Less than 5,000㎡ | 335 JPY/㎡ | 235 to 430 JPY/㎡ | Approximately 16,500 to 30,100 JPY |
| 5,000 to 10,000㎡ | 252 JPY/㎡ | 170 to 320 JPY/㎡ | Approximately 11,900 to 22,400 JPY |
| 10,000 to 20,000㎡ | 271 JPY/㎡ | 200 to 330 JPY/㎡ | Approximately 14,000 to 23,100 JPY |
| 20,000㎡ or More | 255 JPY/㎡ | 190 to 325 JPY/㎡ | Approximately 13,300 to 22,750 JPY |
Source: Ministry of Land, Infrastructure, Transport and Tourism “Guidelines on Repair Reserve Funds for Condominiums” (Reiwa 6, June Revision, PDF) / National average is 13,378 JPY per unit per month (Reiwa 5 Fiscal Year Comprehensive Survey of Condominiums)
In the comprehensive survey for the fiscal year Reiwa 5, 36.6% of management associations responded that “the repair reserve fund is insufficient compared to the plan.” If there is a shortfall, there are four main options.
| Options | Considerations and Cautions |
|---|---|
| ① Adjusting the Construction Schedule | Based on deterioration diagnosis, postpone less urgent construction to the next time. However, it is essential to distinguish between construction that can be postponed and that which cannot, as delaying waterproofing and tile peeling measures will ultimately be more costly. |
| ② Reviewing the Scope and Specifications of Work | Reassessing paint grades, changing from full renovation to partial renovation, etc. Please consider this separately from “apparent cost reductions” that skip processes. |
| ③ Utilizing Subsidies and Tax Systems | Subsidies for energy-saving renovations, etc. (to be discussed later). The reduction of fixed property taxes is a system that lowers the tax amount for each unit owner and does not directly increase the management association’s repair funds. |
| ④ Increasing Reserve Funds, Borrowing, and One-Time Payments | In addition to considering an increase in the repair reserve fund at the general meeting, the Housing Finance Agency’s condominium common area renovation loans require no collateral. Interest rates can be lowered by obtaining management plan certification. |
Subsidies, Tax Systems, and Loans to Check for Large-Scale Renovations in Kawasaki City, Saiwai Ward
Both Kawasaki City and Kanagawa Prefecture do not list subsidies specifically for large-scale renovation work in the publicly available list of grant systems. The available options can be broadly categorized into four types. The eligibility and application status of these systems may change during the fiscal year, so please be sure to confirm with our company or the respective offices before contracting or starting work. (As of October 8, 2026)
| Type | Details |
|---|---|
| ① Support for Consultation and Planning | Dispatch of condominium management advisors (free) and management plan certification, etc. This can be used in the preliminary stages before large-scale repairs. |
| ② Construction Subsidies by Purpose | Barrier-free, seismic resistance, asbestos, EV charging, solar power, energy conservation (windows/insulation), etc. These are incorporated into large-scale repairs. |
| ③ Tax Incentives | Reduction of fixed property tax under the condominium longevity promotion tax system. |
| ④ Public Financing | Renovation loans for common areas of condominiums from the Japan Housing Finance Agency. |
① Condominium Longevity Promotion Tax System (Reduction of Fixed Property Tax)
If large-scale repairs (including exterior painting, floor waterproofing, and roof waterproofing) that contribute to the longevity of condominiums meeting certain requirements are carried out, the fixed property tax for the residential portion will be reduced by half (up to 100㎡ per unit). The reduction applies to the fiscal year with a valuation date of January 1 of the year following the completion of the work.
| Main Requirements | More than 20 years since construction; total number of units is 10 or more; at least one previous large-scale repair (exterior painting, floor waterproofing, roof waterproofing) has been completed; must meet one of the following: ① A condominium with a management plan certification that has raised the repair reserve fund to the certification standard after September 1, 2021 ② A management association that has received advice and guidance, created or reviewed a long-term repair plan that meets certain standards (the city issues a certificate of implementation of advice and guidance); simultaneous application with other reduction measures (seismic resistance, barrier-free, energy conservation renovations, etc.) or having previously received this system’s reduction is not eligible. |
|---|---|
| Deadline for Implementation | From April 1, Reiwa 5 to March 31, Reiwa 9 (2027) for completion of work. |
| Application | Applications must be submitted within three months of the completion date to the Asset Tax Division of the Kawasaki City Tax Office (responsible area: Kawasaki Ward, Saiwai Ward). A large-scale repair certificate (certified by an architect or housing defect liability insurance corporation) and past work certificates are required. If the manager submits the necessary documents, the management association can also apply collectively. |
| Notes | Simply obtaining management plan certification does not qualify; there are requirements such as raising the repair reserve fund. A review of the long-term repair plan is also necessary, so it is recommended to prepare at least one year before the construction. |
- Kawasaki City: Reduction of Fixed Asset Tax for Condominiums with Major Repairs (Official)
- Ministry of Land, Infrastructure, Transport and Tourism: Tax System for Promoting Longevity of Condominiums (Official)
- Ministry of Land, Infrastructure, Transport and Tourism: Fixed Asset Tax Reduction for Major Repairs of Condominiums (PDF)
- Ministry of Land, Infrastructure, Transport and Tourism: Information on Management Plan Certification System and Tax and Loan Benefits (PDF)
* The national leaflet shows the range of reduction rates as a nationwide system. The reduction rate in Kawasaki City is 50%.
② Kawasaki City Condominium Management Support and Grants (For Management Associations, Start Here)
Support and grants from Kawasaki City are based on registration in the “Kawasaki City Condominium Management Association Registration and Support System” (registration fee is free). Management associations that are not yet registered should start here.
| System | Details |
|---|---|
| Condominium Management Association Registration and Support System | The registration fee is free. You can receive support such as the “Kawasaki City Condominium Newsletter” (twice a year) and management association exchange meetings. The applicant must be the administrator (chairperson), and attachments such as the minutes of the general meeting are required. |
| Dispatch of Condominium Management Advisors | Free of charge. Advisors will be dispatched if it is determined that on-site consultation is necessary through the Kawasaki City Housing Supply Corporation’s Housing Salon (044-874-0180). Registered management associations can receive up to three times a year, while unregistered associations can receive once a year. |
| Subsidy System for Costs of Eliminating Steps in Condominiums | For construction costs (excluding consumption tax) of newly installed ramps, handrails, etc., in common areas (pathways within the premises, external entrances, corridors, stairs), one-third (with a maximum of 10,000 yen per unit). Registration is required, and contracts for construction signed before notification of grant decision are not eligible. Replacement or repair of existing handrails is not eligible. *New applications for the fiscal year 2026 have ended due to budget limits. |
| Subsidy System for Seismic Renovation Projects | Applicable to condominiums that received construction confirmation before May 31, 1981. The subsidy rate is two-thirds for seismic diagnosis and seismic design and one-third for seismic renovation; please check the city’s guidelines for the maximum amount. *From April 2026, the subsidy amount for seismic renovations has been expanded. |
| Private Building Spray Asbestos Countermeasure Project | Only the common areas of condominiums are eligible; private areas are not included. The cost of the survey is fully covered (with a limit), and for removal, sealing, and enclosure, two-thirds of the cost (excluding consumption tax) is covered (with a maximum of 3 million yen). *Please check with the city’s Building Guidance Division for the status of applications for the fiscal year 2026. |
| EV Charging Infrastructure Subsidy (for Multi-Family Housing) | Applicable to management associations and owners. Three-quarters of the amount excluding subsidies from the Ministry of Economy, Trade and Industry (four-quarters if applied simultaneously with solar power subsidies); the maximum for standard charging equipment is 230,000 yen/unit. Applications for grants for the fiscal year 2026 will be accepted from April 24, 2026, to February 28, 2027, and may close once the budget is reached. |
| Subsidy for Installation Costs of Solar Power Generation Equipment (for Multi-Family Housing) | Simultaneous application with the EV charging infrastructure subsidy is a condition. For solar power, 70,000 yen/kW (not applicable for FIT), and for storage batteries, 100,000 yen/kWh, with a maximum of 700,000 yen per case. Applications for the fiscal year 2026 will be accepted from April 24, 2026, to December 28, 2026, and may close early depending on the budget situation. |
Source: Kawasaki City “Condominium Management Association Registration and Support System”／Same “Subsidy System” List／Cost Subsidy System for Barrier-Free Renovation Works／Subsidy System for Earthquake Resistance Renovation Projects for Condominiums／Asbestos Spray Countermeasure Project／Subsidy for EV Charging Infrastructure／Subsidy for Installation Costs of Solar Power Generation Equipment
③ Management Plan Certification System (Tax and Interest Rate Benefits)
This is a system certified by Kawasaki City, with a validity period of 5 years. Upon certification, there are interest rate benefits for the Housing Finance Agency’s “Condominium Common Area Renovation Loans” and Flat 35 (Maintenance Type), which also relates to one of the requirements for the Long-Term Durability Promotion Tax System (certification alone does not guarantee tax reduction). The main criteria include holding a general meeting at least once a year, establishing management regulations, separate accounting for management fees and repair reserve funds, ensuring that overdue amounts for more than three months are within 10% of the total, and “having a long-term repair plan that includes large-scale repair works at least twice and is created or reviewed within 7 years, with a planning period of over 30 years.” Additionally, Kawasaki City’s unique criterion requires registration in the Condominium Management Association Registration and Support System.
*The application fee for certification to the city is free. The application requires a resolution from the general meeting and a “Preliminary Confirmation Compliance Certificate” issued by the Condominium Management Center.
④ National Energy Conservation Support | Housing Energy Conservation 2026 Campaign
Changes for Fiscal Year 2026The “Child-Rearing Green Housing Support Project” for Fiscal Year 2025 has been abolished and reorganized into the successor “Mirai Eco Housing 2026 Project.” Additionally, the “Long-Term Excellent Housing Renovation Promotion Project” will end in Fiscal Year 2027 and will not be implemented in Fiscal Year 2026. Please be careful not to base your financial plans on outdated information.
Mirai Eco Housing 2026 Project
| Target | Renovations of existing homes built before December 31, 2016, regardless of whether they are single-family or multi-family residences. Management associations and management corporations can also become joint contractors (can be used for renovations of common areas). Rental properties are also eligible. |
|---|---|
| Required Work | Insulation improvements for openings, insulation improvements for the structure (floor, walls, ceiling), and installation of eco-friendly housing equipment are mandatory combinations. |
| Subsidy Limit | Depending on the age of the building and the energy-saving performance achieved, 400,000 to 1,000,000 yen per unit (1,000,000 yen for homes built before 1991 that meet mandatory standards). |
| Period | Subsidy applications are generally submitted by registered contractors (construction contractors) after the completion of work (the client cannot apply themselves). Applications (including reservations) will end once the budget limit is reached. The status of budget execution is published on the official website, so please check the latest application status before contracting. |
Advanced Window Renovation 2026 Project
| Target | Renovations to high-performance insulation windows, including the installation of interior windows, replacement of exterior windows, and glass replacement in existing homes (single-family and multi-family). Subsidy rates are set separately for “low-rise” and “mid-to-high-rise” multi-family residences. |
|---|---|
| Bulk Application for Multi-Family Residences | From May 29, 2026, applications for “bulk subsidy applications for multi-family residences (including reservations)” have begun. The application process is conducted by registered contractors (window renovation contractors), and management associations cannot apply themselves, but they can apply for all units collectively, making it a system that works well with large-scale repairs for window and entrance door renovations. |
| Subsidy Limit | For residences, 1,000,000 yen per unit (changed from 2,000,000 yen in fiscal year 2025). For non-residential buildings over 240 square meters, 10,000,000 yen per building. |
| Period | Work that commenced after November 28, 2025. Applications for subsidies will be made after the completion and handover of the work and will end once the budget limit is reached. The status of budget execution is updated daily on the official website, so please check the latest application status before contracting. |
⑤ Kanagawa Prefecture Subsidies (Application for Fiscal Year 2026 has ended)
| Existing Housing Energy Efficiency Renovation Subsidy | Houses (including exclusive parts of condominiums) that the applicant resides in and owns or has a share in within the prefecture are eligible. Renovation of windows (including entrance doors) that are exposed to the outside air is mandatory. The subsidy covers one-third of the eligible expenses, or a maximum of 150,000 yen, whichever is lower. The application period for the 2026 fiscal year closed on September 30 after reaching the budget limit. Construction that began before the notification of grant approval is not eligible, and applications by contractors on behalf of the applicant are not permitted. |
|---|---|
| Subsidy for Residential Solar Power Generation and Storage Battery Installation | Management associations of condominium complexes in the prefecture are also eligible. Solar power: 70,000 yen/kW, storage systems: 150,000 yen/unit. The application deadline for the second phase of the 2026 fiscal year was September 30, and the acceptance period has ended. If work commenced before the grant approval date, it is not eligible. This is a system to confirm if you are considering installing solar panels along with rooftop waterproofing. |
* The Existing Housing Energy Efficiency Renovation Subsidy does not cover common areas of rental apartments or units where the owner does not reside.
⑥ Financing System (Housing Finance Agency Condominium Sumairu Loan)
If the management association borrows funds for large-scale repairs, the Housing Finance Agency’s “Condominium Common Area Renovation Loan (Condominium Sumairu Loan)” can be utilized.
| Eligible Construction | Large-scale repairs, seismic retrofitting, flood prevention measures, energy-saving measures, balcony repairs, safety measures for elevators and parking lots, asbestos measures, and diagnostic and design costs by specialists. |
|---|---|
| Collateral | No collateral required (guaranteed by the condominium management center, etc.) |
| Repayment Period | Generally 1 to 10 years, 1 to 20 years for specific construction, and up to 35 years if seismic, flood, and energy-saving construction is carried out after obtaining management plan certification. |
| Interest Rate Reduction | ① Holding of Sumairu Bonds ② Obtaining management plan certification ③ Implementation of seismic, flood, and energy-saving construction, each reducing the rate by 0.2% per year (up to 0.6% per year). |
| Main Requirements | Improvement of management regulations, resolutions at general meetings, the delinquency rate of repair reserve funds must be within 10%. Applications are accepted year-round. |
Source: Housing Finance Agency “Condominium Sumairu Loan” (Official)
Cases where fire insurance can be used and cases where it should not be used
Damage caused by “accidental incidents” such as flying waterproof sheets, caps, and fences due to typhoons or strong winds, hail damage, and lightning strikes may be covered by fire insurance. It is important to clearly document the distinction between damage from accidents and deterioration during the deterioration diagnosis.
On the other hand, the deterioration itself is not covered. There have been many troubles nationwide with businesses soliciting, “You can repair it without any out-of-pocket costs with insurance,” and the National Consumer Affairs Center has repeatedly issued warnings. False claims can lead to insurance fraud charges. Please confirm the eligibility of your claim directly with your management association or owner to the insurance company or agency. Kakeru Koumuten Co., Ltd. does not provide such guidance at all.
Building conditions and repair points in Kawasaki City, Saiwai Ward
Kawasaki City, Saiwai Ward is located in the southeastern part of the city and features a relatively flat terrain nestled between the Tamagawa, Tsurumi, and Yagami rivers. In the southwest, there is Kaseyama, which is at the southern end of the Tama Hills. The ward was established when it transitioned to a designated city in 1972. According to ward materials, it was once an area where factories were concentrated, but due to changes in industrial structure, factories have relocated, and large-scale apartment complexes and research and development facilities have been built on the former sites. Since the urban area around Kawasaki Station, apartment complexes on former factory sites, lowlands along the river, and residential areas near Kaseyama are all within the same ward, the way buildings deteriorate and the method of scaffolding varies depending on the location.
(as of August 1, 2026, estimated)
(as of August 1, 2026, estimated)
(as of August 1, 2026, estimated)
(2020 survey; citywide is 44.6%)
(within Saiwai Ward; public information from Kawasaki City)
Source: Kawasaki City “Population and Household Number Report” as of August 1, Reiwa 8 (Estimated based on census preliminary figures)／Kawasaki City Saiwai Ward “Statistical Data of Saiwai Ward” (PDF, Residential Land based on the 2020 Urban Planning Basic Survey)／Kawasaki City “Overview, Situation, and Characteristics of Saiwai Ward”／Kawasaki City “Landscape Plan Designated Areas”
Buildings in Saiwai Ward are divided into “four types”
In Saiwai Ward, due to the different development histories of the areas, not only the age of the buildings but also the location of the buildings (urban areas around Kawasaki Station and Kashimada Station, large-scale collective housing on former factory sites, low-lying areas along the river, and residential areas with elevation differences near Kaseyama) will affect the type of heavy repairs required in the next major renovation. Please check which type your building falls under.
| Type | District Formation (from public documents) | Estimated Age | Heavy Repairs in Next Renovation |
|---|---|---|---|
| Urban Area around Kawasaki Station and Kashimada Station Around Kawasaki Station, Kashimada, Horikawacho, etc. |
According to district documents, the area around Kawasaki Station is considered a lively area with large commercial facilities, offices, and cultural facilities. Lazona Kawasaki Plaza was developed on the site of the former Toshiba Horikawacho factory, and Kawasaki Delta (opened in Reiwa 3) was established at the west exit of Kawasaki Station. The Omiya-cho area near the west exit of Kawasaki Station, the area around Kawasaki Station, and the western area of Kashimada Station are designated as specific districts for landscape planning. | Varies by construction year | For buildings including stores and offices, exterior wall tiles, sealing, and rooftop waterproofing are key points. In front of the station where there are many pedestrians, adjustments to scaffold placement, pedestrian flow, and delivery time are important. In specific districts, prior consultation with the city is required before any changes to construction or appearance. |
| Large-Scale Residential and Research Development Area on Former Factory Site Shinkawasaki, Kashimada, Ogura, etc. |
According to district documents, part of the site of the former Shintsurumi marshalling yard has been developed into the “Shinkawasaki: Forest of Creation” area, serving as a hub for research and development. After the relocation of factories, large-scale residential complexes have been built on the former sites. The Shinkawasaki area is also designated as a specific district for landscape planning. | Varies by building. The age is confirmed by the construction year and past repair history. | In large residential complexes with many buildings and units, diagnosis and project proposals for each building, and consensus building at general meetings are important. Depending on the age, rooftop waterproofing, exterior wall tiles, sealing, painting of iron parts, and shared facilities are key points. In large blocks of land, planning for scaffold layout and material delivery routes is also important. |
| Residential Areas, Factories, and Businesses in Low-Lying Areas along the River Komukai, Furuichiba, Shimohirakawa, Minamikase, etc. |
The district is relatively flat, located between the Tama River, Tsurumi River, and Yagami River. The city has published flood hazard maps for Kawasaki Ward and Saiwai Ward (Tama River and Tsurumi River), as well as storm surge hazard maps for Saiwai Ward and Nakahara Ward. The composition ratio of residential land is 51.5% for apartment land, exceeding the city-wide average (44.6%) (FY 2020 survey). | Varies by construction year | For rental apartments, small buildings, and small-scale buildings, the focus will be on exterior wall painting, sealing, rooftop and flat roof waterproofing, painting of iron parts, and drainage of rain gutters and drains. For factories and warehouses with large roof and wall areas, roof painting, overlay method, and re-roofing are also key points. Buildings in low-lying areas will focus on checking drainage during heavy rain. |
| Residential Area with Elevation Changes near Kaseyama Minamikase, Kitakase, etc. |
According to district documents, Kaseyama, located at the southern end of the Tama Hills in the southwest, is noted for its lush green scenery. | Varies by construction year | In single-family residential areas and small apartments, the focus will be on exterior wall painting, sealing, rooftop and flat roof waterproofing, and painting of iron parts. In areas with slopes and elevation changes, scaffold placement and material delivery routes will be carefully checked on-site. |
Source: Kawasaki City “Saiwai Ward Overview, Situation, and Characteristics”／Kawasaki City Saiwai Ward “Overview of Saiwai Ward” (PDF)／Kawasaki City “Landscape Plan Designated Areas”／Kawasaki City “Flood Hazard Map (Kawasaki Ward, Saiwai Ward)”／Kawasaki City “Storm Surge Hazard Map”／Kawasaki City Saiwai Ward “Statistical Data of Saiwai Ward” (PDF)
Four Unique Factors in Saiwai Ward That Damage Buildings
We have organized four characteristics of Saiwai Ward visible from Kawasaki City’s public documents that are linked to large-scale repairs.
① Flat Terrain Surrounded by Rivers and Elevation Differences of Kaseyama
According to ward documents, Saiwai Ward has a relatively flat terrain surrounded by the Tama River, Tsurumi River, and Yagami River, with Kaseyama located in the southwestern part. In flat lowlands, buildings with large roofs and exterior walls differ from those near Kaseyama, where there are slopes and elevation differences. Even within the same ward, the necessary surveys and scaffolding plans differ by location. In the comprehensive survey of condominiums for the fiscal year 2023, 36.6% of management associations reported that their repair reserve funds were insufficient compared to their plans.
② Preparedness for Floods, Storm Surges, and Internal Water
Kawasaki City has published flood hazard maps for Kawasaki Ward and Saiwai Ward (Tama River, Tsurumi River), storm surge hazard maps for Saiwai Ward and Nakahara Ward (maximum expected storm surge), and internal water hazard maps. The inundation assumption areas in the flood hazard map were revised in May 2026 to update evacuation information, but the inundation assumption areas and duration of inundation have not changed. The liquefaction risk distribution (surveyed in March 2010) is also published. Which buildings are affected varies by your residence location. During heavy rain, we recommend checking rooftop drains, drainage pipes, water escape routes around the first floor, and site drainage. Clogs in drains and damage to waterproof layers are common causes of leaks.
③ Densely Built Urban Areas and Large-Scale Collective Housing on Former Factory Sites
The population density of Saiwai Ward is 17,703 people/km² (as of August 1, 2026, estimate). According to the ward’s statistical data, the building coverage ratio is 46.9% and the floor area ratio is 141.6%, exceeding the citywide averages (40.5%, 99.2%) (2020 survey). In sites where the distance to neighboring buildings is close, considerations for scaffold installation, high-pressure washing splatter, and paint odors are particularly important. Among residential land, the proportion of land for collective housing is 51.5%, making it a district where large-scale collective housing has been built on former factory sites, thus diagnosing each building and carefully forming consensus in meetings is crucial. We will carefully address the burdens of living at home during construction, as well as concerns about laundry, noise, and scaffold access.
④ City Rules for Scenic Area Designation and District Planning
In Saiwai Ward, there are four designated scenic area planning districts (Omiya-cho District near Kawasaki Station West Exit, Kawasaki Station Surrounding District, Western Kashimada Station District, and Shinkawasaki District) according to publicly available information from Kawasaki City. When constructing buildings or structures in designated districts, prior consultation with the city is required. Additionally, the city’s urban planning projects include district plans for the Kitade 4-chome North District, Western Kashimada Station District, Shinkawasaki District, and Omiya-cho District near Kawasaki Station West Exit. Before deciding on colors or making changes to the appearance, it is essential to check what regulations apply to your property, as this is the first step in forming consensus with neighbors and management associations. Sharing a color simulation of the completed image can facilitate discussions.
Source: Kawasaki City “Saiwai Ward Overview, Situation, and Characteristics” / Kawasaki City “Flood Hazard Map” / Kawasaki City “Storm Surge Hazard Map” / Kawasaki City Waterworks Bureau “Internal Water Hazard Map” / Kawasaki City “Liquefaction Risk Distribution” / Kawasaki City Saiwai Ward “Statistical Data of Saiwai Ward” (PDF) / Kawasaki City “Designated Scenic Area Planning District”・“Urban Planning Projects in Saiwai Ward” / Ministry of Land, Infrastructure, Transport and Tourism “Comprehensive Survey of Condominiums for Fiscal Year 2023” (PDF)
Key Points to Consider When Proceeding with Construction in Saiwai Ward
| Issue | Current Situation in Saiwai Ward and Kakeru Koumuten’s Response |
|---|---|
| Mixed-use buildings and stores around the station | For buildings facing pedestrian-heavy roads, such as around Kawasaki Station and Kashimada Station, it is important to adjust the scaffold installation position, pedestrian flow, and delivery time. We will propose a scaffold plan after confirming the site, taking into account the operations of tenants and stores. |
| Large-scale collective housing on former factory sites and properties with many buildings | For properties with many buildings and units, issues such as rooftop waterproofing, exterior wall tiles, sealing, and shared facilities become important. We will conduct degradation assessments for each building and prepare multiple proposals for whether to carry out work collectively or by building or year, assisting in the comparison and consideration during the general meeting. |
| Buildings on densely built sites with close neighboring properties | In sites where the distance to neighboring buildings is close, it is necessary to consider scaffold installation, water splashing from high-pressure washing, and paint odors. Our in-house scaffold team will assess the site and plan the scaffold layout and protection area, and we will also conduct greetings and notifications to neighbors in advance. |
| Low-lying areas along rivers, flood, storm surge, and internal water preparedness | In areas that are subject to flood, storm surge, and internal water hazard maps, drainage becomes a key issue. We will inspect rooftop drains, drainage pipes, and the water gradient around parking lots, and after confirming there are no damages or blockages in the waterproof layer, we will propose specifications. |
| Slopes near Kaseyama and sites with elevation differences | In areas with slopes and elevation differences, the width of the front road and delivery routes differ by building. Our in-house scaffold team will assess the site and plan the delivery route and scaffold layout, and we will also check the drainage and degradation around retaining walls and the site. |
| Rental apartments, condominiums, and buildings | For rental buildings, it is important to consider notifications to tenants during construction and the impact on occupancy rates after construction. We can assist in creating notification documents for tenants and can also propose an image change with color simulations. |
| Parking lots during construction | The parking spaces on the side where scaffolding will be erected need to be temporarily cleared. In buildings with limited parking, it may take time to secure temporary relocation spots for vehicles. We will coordinate with you about the availability of nearby coin parking and monthly rentals starting 2 to 3 months before construction begins. |
| City rules and colors | Saiwai Ward has four designated landscape planning districts, and district plans are also established (public information from Kawasaki City). In designated districts, prior consultation with the city is required, and the standards, including colors, vary by district. We will confirm the existence and content of designated districts, district plans, and building agreements before deciding on colors, and share the completed image with the management association and neighbors using color simulations. |
*Kakeru Koumuten has five bases in Yokohama City and serves the entire Saiwai Ward, including Kawasaki Station, Kashimada, Shinkawasaki, Ogura, Furuichiba, Komukai, Shimodaira, and Yagami.
Signs of Deterioration Requiring Major Repairs and Timing
Generally, large-scale repairs are recommended every 12 to 15 years. According to a survey by the Ministry of Land, Infrastructure, Transport and Tourism, the actual repair cycle is most commonly 13 years, with about 70% falling within the 12 to 15 year range, and the cycle tends to shorten with each occurrence. However, the actual decision should be based on the condition of deterioration rather than just the number of years, so if you observe any of the symptoms listed below, we recommend an early on-site inspection.
| Location | Dangerous Signs of Deterioration if Left Untreated | Main Countermeasures |
|---|---|---|
| Exterior Wall (Painted Surface) | Chalking (white powder on hands), fading, cracks wider than 0.3mm, blistering or peeling of the paint film | Substrate repair + exterior wall painting |
| Exterior Wall (Tile Surface) | Tile lifting or falling off, chipping of joints, efflorescence, hollow sounds when tapped | Injection for lifting, replacement, clear waterproofing |
| Sealing | Cracks in joints, thinning, peeling, hardening | Re-sealing |
| Roof and Balcony | Bloating or breaking of the waterproof layer, puddles, clogged drains, leaks to lower floors | Urethane waterproofing, sheet waterproofing, drain renovation |
| Metal Parts and Steel Stairs | Rust, peeling paint, corrosion of treads | Grinding + rust prevention + painting, component replacement |
| Roof | Lifting of ridge cap, cracking or warping of slate, moss, misalignment of tiles | Roof painting, roof overlay (cover method), re-roofing |
| Concrete | Spalling (exposed rebar with rust stains), water leakage from cracks | Spalling repair + resin mortar filling |
| Common Corridor and Stair Floor | Lifting or peeling of long sheet flooring, exposed substrate | Replacement of long sheet flooring + substrate waterproofing |
Estimated Repair Cycles by Location (Ministry of Land, Infrastructure, Transport and Tourism Guidelines)
| Location/Work | Estimated Cycle | Location/Work | Estimated Cycle |
|---|---|---|---|
| Exterior Wall Painting (Repainting) | 12 to 15 years | Re-sealing | 12 to 15 years |
| Exterior Wall Painting (Existing Removal + Painting) | 24 to 30 years | Metal Painting | 5 to 7 years |
| Roof Waterproofing (Repair) | 12 to 15 years | Water Supply Pipe (Rehabilitation/Replacement) | 19 to 23 years / 30 to 40 years |
| Roof Waterproofing (Removal and New Installation) | 24 to 30 years | Drain Pipe (Rehabilitation/Replacement) | 19 to 23 years / 30 to 40 years |
* The above are reference examples from the guidelines and are not uniform construction deadlines. The actual cycle will be set according to the specifications, location conditions, and deterioration status of the building.
Source: Ministry of Land, Infrastructure, Transport and Tourism “Guidelines for Creating Long-Term Repair Plans” (Reiwa 6, June revision – PDF) / Ministry of Land, Infrastructure, Transport and Tourism “Survey on the Actual Conditions of Large-Scale Repair Work for Condominiums in FY2021”
Examples of Large-Scale Renovation Work
This is an example of exterior renovation work on a mixed-use building undertaken by Kakeru Koumuten. The building had leaks occurring in several places, and we combined clear waterproofing for the tile exterior wall with waterproofing for the roof for the renovation.
Exterior Renovation Work on a Mixed-Use Building (Tile Exterior Wall Waterproofing + Roof Waterproofing)
| Construction Details | Partial replacement of damaged tiles / Painting of ancillary parts (pipes, water cut-off) / Rooftop waterproofing work (urethane waterproofing) / Exterior wall tile waterproofing (Seven S) / Sealing work around sashes / Repair of exterior wall tile mortar joints / Removal of ivy |
|---|---|
| New Materials Used | Exterior wall tiles: Kunishiro tiles / Painting of ancillary parts: Radical silicone paint / Rooftop waterproofing: High-strength urethane (Sarasene A) / Exterior wall tile waterproofing: Seven S |
| Price Range | 4,000,000 – 4,100,000 JPY |
| Construction Period | 45 days |
| Location | Not disclosed |
| Background to the Construction | Due to leaks occurring from several areas such as the exterior walls and rooftop, we proposed waterproofing for the entire exterior wall. Seven S is a clear waterproofing material for tile exteriors, and while it is somewhat expensive, it offers high waterproofing performance, making it recommended for cases where leaks are occurring from multiple areas of the exterior wall. |
Customer Feedback
Flow from On-site Survey to Completion of Construction
From inquiry to completion of construction and aftercare, a single representative will consistently handle your case. In the case of management associations, a resolution at the general meeting is required, so starting the process 1 to 1.5 years before the desired start date will allow for a smoother progression.
- Contact Us (Free) Please reach out via phone, form, or LINE. If you have estimates from other companies, just presenting them is fine.
- On-site Investigation & Building Diagnosis (Free) We will conduct a survey of the exterior walls, check for cracks, sealing, and waterproofing layers, and if necessary, investigate the rooftop, high places, and leak areas using drones or thermal imaging. For properties in Saiwai Ward, we will also check the location, such as around the station, residential complexes on former factory sites, low-lying areas along rivers, and residential areas near Kaseyama, as well as the distance to neighboring properties, elevation differences, road width and delivery routes, pedestrian flow, drainage, parking, and distance to neighboring properties.
- Submission of Investigation Report & Estimate We will provide a deterioration diagnosis report with photos and an estimate detailing quantities, methods, and materials for each work item. Multiple plans can also be proposed.
- Plan Decision & Contract Confirm colors using color simulations, paint samples, and trial painting. For management associations, we can assist in preparing materials for general meetings. In areas subject to landscape planning, district planning, and building agreements, we will also explain the considerations for color selection.
- Notification to Residents & Neighbors We will distribute construction notifications, visit neighbors to greet them, and set up a bulletin board at the entrance (with a construction schedule and laundry information). If temporary relocation of parking is necessary, adjustments will be made at this stage.
- Installation of Temporary Scaffolding & Various Works Our own scaffolding team will set up the scaffolding, followed by high-pressure washing → substrate repair → sealing → exterior wall painting & tile repair → waterproofing → ironwork & ancillary work in that order. A responsible person will inspect and take construction photos for each process.
- Completion Inspection, Scaffolding Dismantling & Handover We will confirm the finish in the presence of the customer and provide construction photos, a report on the paint used, and a warranty certificate.
- Aftercare Maintenance We will send out annual DM notifications, and inspections can be conducted every year. Simple repairs such as partial sealing are provided free of charge.
Resident Communication, Approval for Additional Work, Inspection Reports
Just as important as the construction itself is “when, what, and with what documents we report”. At Kakeru Koumuten, we will provide materials and reports in the following four situations.
| Situation | What We Provide or Do |
|---|---|
| Before Construction Building Diagnosis |
We will provide a deterioration diagnosis report with photos. This document summarizes the deteriorated areas and the basis for the proposed scope of work. |
| Before Construction to During Construction Notification to Residents & Neighbors |
We will distribute construction notifications, visit neighbors to greet them, and provide information on the construction schedule and laundry through the entrance bulletin board. |
| During Construction Approval for Additional Work |
Deterioration discovered after scaffolding is set up will be presented with photos, quantities, and costs, and work will proceed only after receiving approval. |
| During Construction to Completion Inspection Report |
A responsible person will inspect each process and take construction photos. At completion, we will confirm the finish in the presence of the customer and provide construction photos, a report on the paint used, and a warranty certificate. |
* For management associations, it is smooth to decide in advance who will approve additional work (chairperson, repair committee, etc.) and the estimated amount that will require approval before the contract.
What Will Life Be Like During Construction? Impact on Residents
For large-scale repairs, the principle is to proceed while you continue to live in your home. However, there will be limitations on daily life while scaffolding is in place. Most troubles can be prevented by providing advance notice, so Kakeru Koumuten Co., Ltd. thoroughly explains and posts information before construction begins.
| Impacts | What Actually Happens / Our Response |
|---|---|
| Laundry | On days of high-pressure washing, painting, and waterproofing, outdoor drying will not be possible. We will inform you via bulletin boards and individual mailboxes about “which side will be worked on today” and will do our best to secure days when you can dry your laundry. |
| Window Opening and Closing | In addition to washing and painting days, there may be times when windows cannot be opened during other processes such as protection, drying, and waterproofing. We will provide information for each process, so please check the postings and notifications. We will organize the schedule to avoid continuous closures. |
| Balcony | During floor waterproofing and handrail painting, we ask that you temporarily move personal items, potted plants, and air conditioning outdoor units. The timing will be notified in advance for each unit. |
| Noise and Odor | The period of substrate repairs (breaking and drilling) will be the noisiest. Working hours are generally from 8 AM to 5 PM, and we will accommodate requests such as refraining from work on Sundays and holidays. Low-odor paint options are also available. |
| Security and Privacy | Scaffolding can become a potential entry point. We can take measures such as blocking sightlines with mesh sheets and installing locks and sensor lights on the scaffolding’s access stairs at night. We also thoroughly educate visitors on proper conduct. |
| Parking | Vehicles on the side where scaffolding will be erected will need to be temporarily moved. Since securing a relocation spot may take time, we will work together to secure a relocation spot starting 2 to 3 months before construction begins. |
| Pets, Small Children, and Working from Home | If you have sensitivities to noise, please inform us in advance, and we may be able to adjust the work schedule accordingly. Please feel free to let us know. |
| Rental Units | We can assist owners in creating notification documents for tenants. If you are concerned about the impact of construction on occupancy rates, we can also propose a color simulation for a change in image. |
How to Choose a Large-Scale Repair Contractor and Ordering Methods
There are many large-scale repair contractors that cover the Saiwai Ward of Kawasaki City, and you may be unsure which one to choose. When requesting renovations for apartments, condominiums, or buildings, please check the following four points.
● Extensive experience in large-scale repairs
● Confirm the presence of warranties and aftercare services
● Obtain estimates from multiple contractors (at least three)
● Confirm whether they are self-managed
Extensive Experience in Large-Scale Repairs
Large-scale repair contractors often have websites that showcase their exterior renovation achievements. If they provide detailed explanations of repair contents with photos, it can give you peace of mind as a reference when you actually request their services.
Using evaluations from Google and review sites can be effective when comparing large-scale repair contractors!Be cautious if there are many negative reviews. If there are few reviews, also check the construction track record, the content of explanations, and the management system.
Large-scale repair work involves not only the construction itself but also the potential for troubles with residents and nearby neighbors. Therefore, it is necessary to report the progress of the work and information about laundry on bulletin boards to prevent issues before they arise. Kakeru Koumuten Co., Ltd. specializes in exterior work, so we receive many requests for exterior renovations of apartments and condominiums.
Check for warranties and aftercare services
When choosing a large-scale repair company, make sure to check for warranties. If any issues such as leaks occur after the construction, having a leak warranty from the contractor means you can have it repaired at no cost, providing peace of mind! Companies that offer warranty periods are often confident in their work, making this a key criterion for selecting a contractor.
Warranty periods vary by contractor and the nature of the work, but typically range from 1 to 10 years. Emergency repairs or partial fixes often do not come with leak warranties. Some contractors also offer aftercare services separate from warranties, so be sure to check for warranties and aftercare services.
At Kakeru Koumuten Co., Ltd., we send out annual direct mail for aftercare maintenance, allowing for yearly inspections. We also provide simple repairs such as partial sealing at no charge.
Obtain estimates from multiple contractors (at least 3 companies)
When requesting large-scale repairs, be sure to obtain estimates from multiple contractors. It is important to get estimates from at least 3 companies and compare their quotes and reports! Even for the same work, costs can vary between contractors, and warranties and aftercare services may differ. Additionally, obtaining multiple estimates makes price negotiations easier.
When comparing estimates, consider not only the cost but also the “items in the estimate,” “methods and materials for substrate repairs and exterior painting,” and “confirmation of the process.” Carefully compare these details! If the quality of auxiliary materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price. Especially since substrate repair work can be difficult to assess from appearance alone, ensure that the repair method is appropriate for the condition of the substrate!
Check these items on the estimate (checklist)
| Check Items | Points to Consider |
|---|---|
| Is there an excessive use of “lump sum” notation? | Are the quantities and unit prices clearly stated? With “Exterior Wall Repair Lump Sum,” comparisons and verifications cannot be made. |
| Do the quantities match actual measurements? | Are there quantities recorded that are far from the drawings or actual measurements? This is the area where inflation is most likely to occur. |
| Proportion of miscellaneous expenses | Details and proportions of site management costs, general management costs, statutory welfare costs, etc. According to the Ministry of Land, Infrastructure, Transport and Tourism’s survey for the 3rd year of Reiwa, the average is about 10% of construction costs (excluding common temporary costs), but this varies depending on the scale and conditions of the building, so there is no uniform standard. |
| Are the names of materials written? | Are the manufacturer names, product names, grades, and number of coats for paints and waterproofing materials listed? |
| Treatment of quantities for substrate repairs | This is an item that cannot be accurately measured until scaffolding is set up. It is crucial to specify whether it is “estimated quantity” or “actual quantity settlement,” and the agreements for increases or decreases. |
| Guarantee and after-inspection | Warranty period for each construction, frequency of inspections, and scope of free support. |
| Company backing | Type of construction industry license, track record of similar scale and structure, presence of qualified personnel. |
Check if it is managed in-house
Large-scale repair work includes various tasks such as “substrate repair work,” “exterior wall painting,” “waterproofing work,” and “pipe replacement,” and the plan content will change based on the actual deterioration condition and customer preferences.
There are cases where contractors that completely outsource to subcontractors lack knowledge and experience, leading to proposals for repairs in irrelevant areas or unnecessary work. If you request a subcontractor after investigation, it may incur additional time and costs. By managing in-house with knowledge and experience, responsible construction can be carried out at reduced costs.
Additionally, contractors that outsource to subcontractors may also have delayed responses in the event of any trouble during construction. It is safer to avoid having a company that has not actually consulted with the customer manage the construction. Kakeru Koumuten performs everything from temporary scaffolding setup to exterior wall painting and waterproofing work in-house, with knowledgeable and experienced personnel managing the construction!
There are three ordering methods. The choice affects the approach.
Especially for management associations, it is necessary to decide “how to request” before “which company to hire.” The main ordering methods are the following three.
| Method | Process | Advantages | Disadvantages |
|---|---|---|---|
| Responsible Construction Method | The construction company handles everything from investigation, design, construction, to management. | No additional costs for commissioning design consultants (investigation and design costs may be included in the construction costs) / A single point of contact reduces the burden on the management association / Responsibility is clear / The period until ordering can sometimes be shortened. | Specifications can easily be left to the construction company, making it difficult to compare side by side / Third-party checks are hard to implement, requiring the management association to verify price, specifications, and construction status. |
| Design Supervision Method | A design office or consultant conducts the investigation and design, while a separate company handles the construction. | Allows comparison of construction companies under the same conditions / Independent supervision during construction. | Consulting fees are required separately / Attention is needed for risks of conflicts of interest and collusion / The period can easily become prolonged. |
| Management Company Prime Contract Method | The management company acts as the prime contractor, and subcontractors perform the construction. | Easy coordination with daily management / Minimal effort required from the management association. | Can easily become expensive due to intermediate margins / Competition principles are hard to apply. |
Collusion and Inappropriate Consulting Issues in Large-Scale Renovations and Self-Defense Measures
Latest 2026 In the large-scale renovation industry, inappropriate orders linked between design consultants and construction companies have long been a problem. The Ministry of Land, Infrastructure, Transport and Tourism issued warnings and notifications to management associations in January 2017 and April 2023, and on September 28, 2026, the Japan Fair Trade Commission announced that it had issued exclusion orders to 38 companies and a total of 1.63788 billion yen in surcharge payment orders to 37 companies regarding large-scale renovation work commissioned by condominium management associations to design consulting firms in the Kanto region (two design consulting firms were also subject to exclusion orders).
*This content is based on the announcement by the Japan Fair Trade Commission (September 28, 2026).
Three Typical Methods
① Dummy Estimates
Prior to receiving orders, companies are predetermined, and other companies only provide high estimates in a formal manner, creating a “fixed race.” This gives the management association the appearance of having “properly obtained competitive estimates.”
② Collusion with Design Supervisors
While consultants contract at extremely low design supervision fees, they receive kickbacks from the high construction costs of partnered construction companies. Be cautious of design supervision fees that are too low as they are a warning sign.
③ Back Margin
A certain percentage of the contract amount is given as a kickback, which is then added to the construction costs as expenses. As a result, the management association ends up paying extra.
Self-Defense Measures for Management Associations
- Obtain independent estimates from multiple companies
- Consult with neutral third parties such as condominium management professionals or architects
- Document the vendor selection process in meeting minutes to ensure transparency
- Confirm the reasons for abnormally low consulting fees
- Include a penalty clause in the contract for cases of collusion
- Avoid concentrating information with a single consultant and verify specifications independently
Frequently Asked Questions about Large-Scale Repairs in Saiwai Ward, Kawasaki City
- How much does large-scale repair in Saiwai Ward, Kawasaki City cost?
- For condominiums, according to the Ministry of Land, Infrastructure, Transport and Tourism’s survey for the fiscal year 2021, about 70% of cases fall within the range of 750,000 to 1,500,000 yen (excluding consumption tax and common temporary construction costs), with the most common range being 1,000,000 to 1,250,000 yen. Based on our construction records, the cost for a two-story wooden apartment is estimated at 2,000,000 to 4,000,000 yen, for a three-story steel or RC apartment at 4,000,000 to 9,000,000 yen, and for small condominiums or mixed-use buildings at 5,000,000 to 15,000,000 yen. The cost varies depending on the condition of the substrate and whether waterproofing or roofing work is required, so we provide free on-site estimates.
- How often should large-scale repairs be conducted?
- Generally, a cycle of 12 to 15 years is recommended, and the actual cycle is most commonly 13 years according to the Ministry of Land, Infrastructure, Transport and Tourism’s survey, with about 70% falling within the 12 to 15-year range. However, the decision should be based on the condition of deterioration rather than just the number of years. If deterioration of sealing, tile lifting, or breaks in the waterproof layer are observed, it is advisable to carry out repairs without waiting for the cycle, as this can ultimately reduce costs. Older buildings tend to have a higher proportion of tile repairs and steel part replacements during the second and third repairs.
- How long does the construction period take? Can residents stay during the work?
- For apartments, the construction period is typically 3 weeks to 2 months, for small condominiums or buildings it is about 1.5 to 3 months, and for condominiums with over 50 units, it takes around 4 to 6 months. Residents can remain in their homes during the construction. However, there will be restrictions on drying laundry outside and opening windows while scaffolding is in place, so we make thorough efforts to minimize the impact on daily life, including distributing notices before construction, providing information on the schedule and laundry through bulletin boards, and strictly adhering to working hours.
- How long should I expect from the start of planning to the completion of construction?
- For management associations, it typically takes about 1 to 1.5 years for establishing the repair committee, conducting building diagnostics, selecting contractors, and passing resolutions at general meetings, followed by 3 to 6 months for construction. Overall, it is advisable to plan for about 2 years to proceed with some leeway. If you are using subsidies or tax incentives, please also factor in the time needed to obtain management plan certification (which requires prior confirmation and a resolution at the general meeting).
- Are there any subsidies available for large-scale repairs in Saiwai Ward, Kawasaki City?
- Neither Kawasaki City nor Kanagawa Prefecture lists subsidies specifically for large-scale repair work in their publicly available grant program lists. However, for condominium owners, if certain conditions are met, a 50% reduction in fixed property tax can be applied under the “Condominium Longevity Promotion Tax System.” There is also a subsidy for barrier-free renovation of common areas in Kawasaki City, which covers one-third of construction costs (with a cap of 10,000 yen per unit), but new applications for fiscal year 2026 have ended due to budget limits. If the work includes windows and insulation, it may qualify for “Advanced Window Renovation 2026” or “Mirai Eco Housing 2026.” The application timing and applicants vary by program, so please check the eligibility conditions and application procedures for each program before contracting or starting construction.
- I heard that fixed property tax can be reduced through large-scale repairs. Is that true?
- It is true if the conditions are met. Under the Condominium Longevity Promotion Tax System, if a condominium that is over 20 years old and has more than 10 units conducts large-scale repairs that contribute to longevity (including exterior painting, floor waterproofing, and roof waterproofing), the fixed property tax for the residential portion can be reduced by half for up to 100 square meters per unit. This applies to work completed between April 1, 2023, and March 31, 2027, and a declaration must be made to the Kawasaki City Tax Office (responsible for Kawasaki and Saiwai Wards) within three months of completion. For certified management plan condominiums, there are additional requirements such as increasing repair reserve funds, so it is recommended to start preparations more than a year before construction.
- Are there any changes to subsidies starting from fiscal year 2026?
- Yes, there are. The national “Child-Rearing Green Housing Support Project” has been abolished and reorganized into the successor “Mirai Eco Housing 2026 Project.” Management associations and management association corporations can also become joint project participants, allowing for insulation renovations in common areas. Additionally, the “Long-Term Excellent Housing Renovation Promotion Project” will end in fiscal year 2025 and will not be implemented in fiscal year 2026. The “Advanced Window Renovation 2026 Project” began accepting bulk applications for apartment buildings starting May 29, 2026 (application procedures will be handled by registered contractors). Please be careful not to base your financial planning on outdated information.
- What should I do if the repair reserve fund is insufficient?
- 選択肢は主に4つです。①劣化診断のうえで緊急性の低い工事を次回に送る、②工事範囲や仕様を見直す、③補助金などの支援制度を確認する、④修繕積立金の増額や住宅金融支援機構の融資を検討する、です。同機構のマンション共用部分リフォーム融資は担保不要で、管理計画認定の取得や省エネ・耐震工事の実施により金利が最大年0.6%引き下げられます。なお、防水とタイル剥落対策の先送りは結果的に高くつくことが多いため、切り分けの判断はご相談ください。
- Can you handle large-scale repairs for properties with many buildings, like apartment complexes?
- Yes, we can discuss this. In Saiwai Ward, there are large-scale residential complexes built on former factory sites, and we also accept inquiries for properties with many buildings and units. For properties with many buildings, it is important to conduct deterioration assessments for each building, plan whether to carry out assessments collectively or by building or year, and reach consensus at general meetings. Kakeru Koumuten Co., Ltd. also considers apartments with over 100 units as targets for cost estimates and will provide proposals that allow for comparison of multiple plans.
- What happens to residents’ parking during construction?
- Vehicles on the side where scaffolding will be erected will need to be temporarily moved. In buildings with limited parking availability, securing a relocation spot may take time. Kakeru Koumuten Co., Ltd. will coordinate with you regarding the availability of nearby coin parking and monthly parking lots starting 2 to 3 months before construction begins.
- Can I choose the color of the exterior freely?
- In Saiwai Ward, there are four designated scenic areas according to public information from Kawasaki City (Kawasaki Station West Exit Omiya Town Area, Kawasaki Station Surrounding Area, Kashimada Station West Area, and Shinkawasaki Area), and if you plan to construct buildings or structures in these areas, you need to submit a prior consultation request to the city. Additionally, there are district plans established in areas such as the Kitade 4-chome North Area. The existence and content of regulations regarding appearance and color vary by district, plan, and agreement. You can check what regulations apply to your property through Kawasaki City’s urban planning, landscape, and building agreement public information, or you can inquire about specific districts at the Kawasaki City Urban Development Bureau Planning Department Landscape and District Development Support (044-200-3022). We will also investigate this during our survey. Sharing a color simulation of the completed image can facilitate discussions with neighbors and community associations.
- Are there differences in construction depending on the location, such as around Kawasaki Station, residential complexes on former factory sites, low-lying areas along the river, or residential areas near Kaseyama?
- Saiwai Ward is relatively flat, situated between the Tamagawa, Tsurumi, and Yagami rivers, with Kaseyama located in the southwest. The area includes urban districts around Kawasaki Station, residential complexes built on former factory sites, low-lying areas along the river, and residential areas near Kaseyama, leading to variations in slopes, elevation differences, road widths, pedestrian traffic, distances to neighboring properties, and building sizes. This may require ingenuity in setting up scaffolding and transporting materials. Kakeru Koumuten Co., Ltd. has its own scaffolding team that will assess the site and plan the transportation route and scaffolding layout. Additionally, Kawasaki City publishes hazard maps for flooding, storm surges, and internal water, so we also focus on inspecting rooftop drains, drainage areas, and waterproofing layers for damage in preparation for heavy rain. The degree of deterioration varies by building, so we will conduct individual assessments during the on-site survey.
- Which method should I choose, the responsibility construction method or the design supervision method?
- For smaller buildings, the burden of consulting fees tends to be heavier, so we believe that the responsibility construction method is often more suitable for medium-sized buildings. The design supervision method allows for comparison of construction companies under the same conditions since a third party creates the specifications; however, it incurs separate consulting fees and requires caution regarding conflicts of interest and collusion risks. Even with the responsibility construction method, verifying price, specifications, and construction status is essential. Kakeru Koumuten Co., Ltd. provides estimates that clearly outline quantities, methods, and materials for each construction item, allowing you to compare them on the same level as other companies.
- How can I detect collusion in large-scale repairs?
- There are three typical methods. ① Deciding on a contractor in advance and having other companies submit only formal high estimates, known as “dummy estimates”; ② A consultant contracts at an extremely low design supervision fee and receives kickbacks from partner companies, creating a conflict of interest; ③ Adding a portion of the contract amount as a back margin to the construction costs. Countermeasures include obtaining independent estimates, consulting a neutral third party, documenting the selection process in minutes, and including penalty clauses in contracts.
- How many companies should I get estimates from?
- 最低3社をおすすめします。多すぎると比較しきれず、少なすぎると競争が働きません。大切なのは社数よりも「同じ土俵を作ってから比べること」です。共通の仕様書や数量表を作って同一条件で依頼し、「一式」表記を認めず内訳明細を必須にすると、金額差が範囲の違いなのか単価の違いなのかがはっきりします。
- What is the difference if we have our own scaffolding?
- In large-scale repair projects, temporary construction accounts for about 20% of the total cost (according to the Ministry of Land, Infrastructure, Transport and Tourism’s fiscal year 2021 survey). By not outsourcing scaffolding work, we can easily control costs in this area, and our in-house scaffolding team can flexibly respond to sudden changes or additional work. Kakeru Koumuten Co., Ltd. owns scaffolding materials for approximately 100 detached houses and plans scaffolding on-site according to the site conditions.
- I’m in the middle of getting multiple estimates; can I just have a look at your estimate?
- Of course, that’s possible. If you bring in estimates from other companies, we will check for free whether the items, quantities, methods, and materials are appropriate and provide you with an estimate under the same conditions. We welcome multiple estimates.
- Can I request just emergency repairs for a leak?
- Yes. As a preliminary step before large-scale repairs, we also accept requests for emergency repairs or partial repairs for leaks. We will identify the cause using thermal imaging and drones and propose the minimum necessary repairs.
- Can you handle roofing or exterior wall materials that contain asbestos?
- Yes, we can. We have qualified personnel who are certified as asbestos work supervisors and building material surveyors for asbestos-containing materials. We handle everything from the legally required preliminary surveys to the cover method and removal of asbestos-containing roofing materials. If there is sprayed asbestos, you may be eligible for full coverage (with limits) of the investigation costs for common areas of condominiums under Kawasaki City’s private building sprayed asbestos countermeasure project, as well as two-thirds (up to 3 million yen) of the costs for removal, encapsulation, and enclosure. The application status for fiscal year 2026 needs to be confirmed with the city, and we will provide that information as well.
- What happens if large-scale repairs are not done?
- There are risks such as personal injury from falling exterior wall tiles, structural deterioration due to corrosion of rebar, leaks, and a decrease in asset value. Furthermore, for buildings subject to periodic reporting under Article 12 of the Building Standards Act, investigations using full probing, etc., are required under certain conditions, such as when more than 10 years have passed since completion or exterior wall renovations for tiled or mortar-finished walls. Although the list of periodic reporting target uses published by Kawasaki City does not include apartment buildings, mixed-use buildings that include stores require individual confirmation. Even if not subject to statutory investigations, regular inspections and maintenance are essential, so please consult us if you are unsure.
- How much does large-scale repair for an apartment (about 10 units) cost?
- For a wooden two-story building with 6 to 10 units, the estimate is between 2 million and 4 million yen, and for a three-story steel or RC building with 10 to 20 units, it is between 4 million and 9 million yen, based on our company’s track record (including scaffolding, substrate repairs, exterior wall painting, sealing, and waterproofing). It is common for apartments to undergo repairs every 10 to 15 years. For owners, there is an increasing trend to change the exterior appearance using color simulations during repairs to improve occupancy rates.
If you are looking for a large-scale repair contractor in Saiwai Ward, Kawasaki City, contact Kakeru Koumuten
Our company is based in Yokohama City and has handled many exterior wall renovations and large-scale repairs for condominiums and apartments in Saiwai Ward. We are happy to assist not only with large-scale repair work but also with partial repairs and leak repairs. In urgent cases such as leaks, emergency measures may be possible, so please feel free to consult us. “I want it to last long with one renovation” “I want to keep costs down as much as possible” “I want to improve insulation performance because the indoors are hot” We will propose the best solutions for your specific requests and future repair plans.
From temporary scaffolding work to roofing and exterior wall painting, all work is performed by our own team. We are confident that we will not lose in terms of cost, quality, and planning compared to other companies, so we welcome multiple estimates!
On-site surveys, estimates, and color simulations are all free of charge
Please feel free to consult us via the inquiry form, phone, or LINE.
It’s perfectly fine to just present estimates from other companies.
Large-Scale Repair Work Service Area
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and the entirety of Tokyo.
Endo-cho / Omiya-cho / Ogura / Kashimada / Kawahara-cho / Kitakase / Komukai / Komukai-cho / Komukai Toshi-ba-cho / Komukai Nakano-cho / Komukai Nishi-cho / Konyamachi / Saiwai-cho / Shimodaira-ma / Shinogura / Shinkawasaki / Shintsukagoshi / Shinmei-cho / Tsukagoshi / Todete Honmachi / Todete / Nakai Saiwai-cho / Higashi Ogura / Higashi Koichiba / Koichiba / Furukawa-cho / Horikawa-cho / Minami Kase / Minami Saiwai-cho / Miyako-cho / Yagami / Yanagimachi
・When should large-scale renovations be carried out? An explanation of the optimal timing and risks of postponement!
・Estimates are essential when conducting large-scale renovations! Key points for comparison and precautions!
・5 common troubles in large-scale renovations of condominiums! A thorough explanation of causes and prevention measures!
・What is waterproofing work in large-scale renovations? A thorough explanation of roles, signs of deterioration, and precautions!
・Insufficient funds for large-scale renovations… An explanation of how to deal with funding shortages and preparations you can do right now!
・What is substrate repair in large-scale renovations? A thorough explanation of necessary reasons, signs of deterioration, and types of work!
・What is sealing work in large-scale renovations? An introduction to roles, methods, and tips for avoiding failures!
・What is tile repair in large-scale renovations? An explanation of signs of deterioration, types of work, and cost averages!
・What is exterior wall painting in large-scale renovations? A thorough explanation of necessity, signs of deterioration, and cost averages!
・For exterior renovations in Saiwai Ward, Kawasaki City, trust Kakeru Koumuten!
・For roof renovations in Saiwai Ward, Kawasaki City, trust Kakeru Koumuten!
・For exterior wall painting in Saiwai Ward, Kawasaki City, trust Kakeru Koumuten!
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contact Kakeru Koumuten Co., Ltd.
Kakeru Koumuten is a young company whose team is, on average, in their late twenties, but our skills are second to none.
Our greatest strength is that we handle scaffolding, roofing and painting entirely in-house. In an industry where these tasks are usually divided among contractors, our complete service simplifies project management and helps keep costs down. Above all, if a problem arises, we respond promptly.
We proudly describe ourselves as the youngest and most helpful renovation company in Kanagawa!
