Leave the repairs and renovations of condominiums and apartments in Fujisawa City, Kanagawa Prefecture to Kakeru Koumuten Co., Ltd.!

Large-Scale Repairs for Condominiums, Apartments, and Buildings in Fujisawa City

Large-scale repair work available in Fujisawa City

Large-scale repairs are not just “exterior painting” or “waterproofing,” but rather a comprehensive repair of the entire building’s deterioration while scaffolding is in place. At Kakeru Koumuten, we can handle all the work listed below with our own team, ensuring clear responsibility and coordination of the process.

Scope of Major Repairs Determined from Building Diagnosis

It is not guaranteed that all of the above works will be carried out. The extent of the work will be determined based on the results of the building diagnosis. At Kakeru Koumuten Co., Ltd., we conduct a free on-site survey to confirm the items below, compile them into a deterioration diagnosis report with photos, and propose the scope of work.

Reasons Kakeru Koumuten is Chosen for Large-Scale Repairs in Fujisawa City

The reason why we can be entrusted with large-scale renovations in Fujisawa City is partly because “Kakeru Koumuten has a base in Yokohama City”, but also due to our “initiatives in large-scale renovation 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 renovations. We have established five bases centered around Yokohama City for our material storage and showroom.

In-house Scaffolding Materials

We own the scaffolding materials necessary for temporary scaffolding required for large-scale renovations 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 detached houses!

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, allowing us to provide swift responses in emergencies!

In-house Sorting of Waste Materials

Large-scale renovations generate various waste materials such as waste paint, metals, and wood. At Kakeru Koumuten, we sort and recycle waste materials in-house, which helps reduce waste disposal costs.

Showroom Dedicated to Exterior Renovations

In the showroom, not only can you have meetings, but you can 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 business 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 handle large-scale roofing projects for factories and more! We also have qualified personnel for asbestos work supervisors and building material asbestos surveyors, so we can handle asbestos-containing roofing materials and pre-investigations.

4. Warranty and Aftercare

Most large-scale repair works, including “painting work,” “substrate repair work,” and “waterproofing work,” come with a warranty!
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 also address exterior walls and rooftops that cannot be inspected from high places using drones! During leak investigations, we can utilize a thermal imaging camera to help identify the cause of leaks!

We will respond according to your wishes. We also accept emergency measures for sudden leaks! We will respond quickly to urgent requests!

6. Staff Development

Our staff create various models for skill enhancement and conduct practical training. Since different processing and techniques are required at each site, we regularly provide skill improvement education to ensure each staff member can respond effectively. We also educate on points to pay attention to and areas to check during large-scale repair work.

7. Consideration for Residents and Neighbors

During large-scale repair work, we not only notify residents and greet neighbors, but we also install 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

Inspections are conducted by responsible personnel at each stage, along with detailed photographs of the work. We use film thickness inspection equipment and check sheets to ensure no inspection oversights occur. During exterior painting and waterproofing work, we verify the quantity of paint used by checking the number of empty paint cans and prevent construction defects by ordering paint in-house. Of course, we will also photograph and report on the used paint.

9. Color Simulation for Exterior Painting

9-1 Self-Color Simulation

The simulations created by our company can be done using actual photos of your apartment or building!You can also perform the simulation on your smartphone or computer. By simulating and then 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.

* In Fujisawa City, for buildings above a certain size, a notification for landscape change is required for repairs or color changes that alter the appearance. In scenic districts, landscape districts, and landscape formation districts, there are specific regulations for each area, so prior confirmation of the exterior wall color is necessary. Having a color simulation screen will help facilitate explanations at community meetings and general meetings.

9-2 Confirm actual colors with a test paint!

You can order samples of the paint you are considering and perform test painting on your exterior wall. By conducting a test paint, you can confirm the actual color and gloss!

9-3 Exterior renovation simulation

Exterior simulations for apartments and condominiums are also possible!
・Exterior wall color simulation (two-tone color is also possible)
・Simulation for applying metal siding
・Simulation using accent materials such as cornices and louvers
・Simulation for roof painting or roof replacement work

With exterior renovation simulations, you can minimize the risk of failure in image changes! We hope that renovating the appearance of your apartment or condominium will help increase occupancy rates.

Cost Estimates for Large-Scale Renovations in Fujisawa City

The cost of large-scale renovations 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, then to our company’s cost estimates based on past projects categorized by size, and finally to examples of unit prices for each type of work.

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 renovations 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. Note that the amounts in this survey do not include consumption tax and common temporary costs, so they differ from the current total construction costs including tax.

Source: Ministry of Land, Infrastructure, Transport and Tourism “Survey on Large-Scale Renovations of Condominiums for FY 2021” (200 companies, 818 cases) *Amounts do not include consumption tax or common temporary costs. Percentages may not total 100% due to rounding and non-responses.

Breakdown of Construction Costs (What the Money is Spent On)

Source: Ministry of Land, Infrastructure, Transport and Tourism “Fiscal Year 2021 Survey on Large-Scale Renovation Work for Condominiums” (Second survey of large-scale renovation work. The overall average is 59.0% for construction-related, 22.3% for temporary structures, and 9.9% for miscellaneous expenses). *The total does not add up to 100% because it includes equipment-related work, exterior works, and others. This is an average value and is not a criterion for judging the appropriateness of individual estimates.

Cost Estimates by Building Size (Scaffolding, Substrate Repair, Exterior Painting, Waterproofing, Sealing)

*The above is an estimate based on Kakeru Koumuten’s construction performance and may vary depending on the presence of roofing work, metal work, plumbing, etc. For condominiums, please also use the amount obtained by multiplying the above national statistics (750,000 – 1,500,000 JPY per unit) by the number of units as a reference.

Breakdown of Costs for Temporary Structures, Substrate Repair, Exterior Walls, and Waterproofing

The estimate for large-scale renovations 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.

Examples of Unit Prices for Repair Work

*Costs and warranty periods vary depending 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 does not equal the right choice.” The best way to choose is to align when to perform the next major repair with the lifespan of the materials to avoid waste.

* 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 exposure, and ventilation, so confirming the condition of each side through a site survey and selecting paint suitable for the location can change durability.

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 on a monthly basis per exclusive area. Additional charges are required if there is a mechanical parking lot.

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.

Subsidies, Tax Systems, and Loans to Confirm for Large-Scale Renovations in Fujisawa City

Both Fujisawa City and Kanagawa Prefecture could not confirm any subsidies specifically for large-scale renovation work based on publicly available information (the city offers support subsidies for management plan certification and long-term repair planning). The available options can be broadly categorized into four types. The eligibility and application status of these systems may change even during the fiscal year, so please be sure to check with our company or the respective offices before contracting or starting work. (As of October 8, 2026)

① Condominium Longevity Promotion Tax System (Property Tax Reduction)

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 property tax amount for the residential portion will be reduced (up to the equivalent of 100㎡ per unit). In Fujisawa City, the property tax for the following year for eligible properties will be reduced to half.

* The reporting destination is the Asset Tax Division of Fujisawa City (direct line 0466-50-3511). For details of the system or if there are construction plans, please confirm with the Housing and Living Policy Division (direct line 0466-50-3541) before the construction.

② Fujisawa City Condominium Management Support (For Management Associations, Start Here)

On the public page of Fujisawa City, no subsidies for the actual costs of large-scale repair work were confirmed. The focus is on support for certification of management plans, creation of long-term repair plans, and consultations with experts. The contact point is the Housing and Living Policy Division (direct line 0466-50-3541).

* Any subsidies will be excluded if contracts or construction begin before the grant decision. Application periods and acceptance status change every fiscal year.

Source: Fujisawa City “Support System for Condominium Management” / Same “Subsidy Grant System for Seismic Renovation Work for Condominiums”

③ Management Plan Certification System (Gateway to Tax and Interest Rate Benefits)

Based on the national system, Fujisawa City certifies this system, which began operation in December of Reiwa 5. The certification standards are the same as the national ones, and there are no unique city standards. Upon receiving certification, there are interest rate benefits for the “Condominium Common Area Renovation Loan” from the Japan Housing Finance Agency and Flat 35 (maintenance type), and it is also related to one of the requirements of the long-life promotion tax system (certification alone does not lead to tax reductions). The certification requirements are based on the national “Standards for Condominium Management,” which includes 16 items. The main criteria include holding general meetings at least once a year, maintaining management regulations, separate accounting for management fees and repair reserves, overdue amounts of three months or more being within 10% of the total, and “having created or reviewed a long-term repair plan that includes large-scale repair work at least twice within 30 years and within 7 years.” Applications are made using the “Management Plan Certification Procedure Support Service” of the Public Interest Incorporated Foundation Condominium Management Center.

* There is no application fee for Fujisawa City. However, a separate system usage fee for support services will apply (the amount can be confirmed on the condominium management center’s website). The validity period of the certification is not mentioned on the city’s page.

④ National Energy Saving Support | Housing Energy Saving 2026 Campaign

Changes for 2026The “Child-Rearing Green Housing Support Project” for 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 Reiwa 7 and will not be implemented in Reiwa 8. Please be careful not to establish financial plans based on outdated information.

Mirai Eco Housing 2026 Project

Advanced Window Renovation 2026 Project

⑤ Kanagawa Prefecture Subsidies (Applications for Fiscal Year 2026 have ended)

*The subsidy for existing housing energy saving renovation costs does not cover common areas of rental apartments or units where the owner does not reside.

⑥ Financing System (Housing Finance Agency Mansion Sumairu Loan)

If the management association borrows funds for large-scale repairs, the Housing Finance Agency’s “Mansion Common Area Renovation Loan (Mansion Sumairu Loan)” can be utilized.

Source: Housing Finance Agency “Mansion Sumairu Loan” (Official)

Cases Where Fire Insurance Can Be Used and Cases Where It Cannot

Building Conditions and Repair Points in Fujisawa City

Fujisawa City is the central city of Shonan, facing Sagami Bay in the southern part of Kanagawa Prefecture. It encompasses various areas with different environments, including the coastline near Enoshima and Shonan Beach, around stations such as Fujisawa, Shonandai, and Tsujido, residential areas like Kugenuma and Kataseyama, large-scale housing complexes, and developments like Shonan Life Town. Additionally, there are five scenic districts and two landscape districts within the city, and notifications based on the landscape plan apply to the entire city area. Depending on the location, the way buildings deteriorate, the method of scaffolding, and the necessary procedures before construction can vary.

Source: Fujisawa City “Population and Number of Households in Fujisawa City” (Estimates based on the Reiwa 7 National Census Preliminary Report)／Same “Overview of Fujisawa City in Numbers”／Same “Fujisawa City Apartment Management Improvement Plan” (December, Reiwa 5)／Same “Scenic Districts”

Buildings in Fujisawa City are divided into “four types”

In Fujisawa City, due to differences in distance from the sea and appearance rules depending on the location, not only the age of the building but also the location of the building (coastal areas near Enoshima and Shonan Beach / urban areas around stations / residential areas in scenic districts / older apartments and housing complexes) will affect the extent of construction and procedures required for the next major repair. Please check which type your building falls into.

Source: Fujisawa City “Tsunami Inundation Assumption Map (Created in March 2015)”／Same “Notification Requirements Based on the Landscape Act”／Same “Fujisawa City Landscape Plan”／Same “Scenic Districts”／Same “Fujisawa City Apartment Management Improvement Plan”

Four Factors Unique to Fujisawa City That Damage Buildings

From the characteristics visible in Fujisawa City’s public documents, we have narrowed it down to four factors that lead to large-scale repairs.

Source: Fujisawa City “Tsunami Inundation Assumption Map”／Same “Fujisawa City Condominium Management Improvement Plan”／Same “Notification Targets Based on the Landscape Act”／Same “Scenic Districts”

Key Points to Consider When Proceeding with Construction in Fujisawa City

※Kakeru Koumuten has five locations within Yokohama City and serves all areas of Fujisawa City, including Fujisawa, Shonandai, Tsujido, Kugenuma, Katase, Zengyo, and Chogo.

Source: Fujisawa City “Notification Targets Based on the Landscape Act”／Same “Scenic Districts”／Same “Guidelines for Greening Buildings”

Signs of Deterioration Requiring Major Repairs and Timing

Generally, major 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 determination 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.

Estimated Repair Cycles by Part (Ministry of Land, Infrastructure, Transport and Tourism Guidelines)

*The above is a reference example of guidelines and is not a uniform construction deadline. Actual cycles 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” (Revised June 2024, PDF) / Ministry of Land, Infrastructure, Transport and Tourism “Survey on 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 from several locations, and we combined clear waterproofing for the tile exterior wall with roof waterproofing for the renovation.

Exterior Renovation Work for Mixed-Use Building (Tile Wall Waterproofing + Roof Waterproofing)

Customer Feedback

Process from On-Site Survey to Completion of Work

From the initial inquiry to the completion of work and aftercare, a single representative will consistently handle your case. For management associations, a resolution at the general meeting is necessary, so starting the process 1 to 1.5 years before the desired start date will allow for a smoother progression.

1. Contact Us (Free) Please reach out via phone, form, or LINE. If you have estimates from other companies, it’s fine to just present those.
2. On-site Investigation & Building Diagnosis (Free) We will conduct an exterior wall inspection, 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 Fujisawa City, we will confirm whether the location is coastal or on a slope, along a main road or in a residential area, the distance to neighboring properties, the width of the road and delivery routes, pedestrian flow, drainage, rust on metal parts and fittings, and also check the parking lot.
3. Investigation Report & Estimate Submission We will provide a deterioration diagnosis report with photos and an estimate detailing quantities, methods, and materials for each work item. Proposals for multiple plans are also possible.
4. Plan Decision & Contract Confirm colors through 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, scenic districts, or district planning, we will also explain the considerations for color choices.
5. Notification to Residents & Neighbors We will distribute construction notifications, visit neighbors for greetings, and install a bulletin board at the entrance (with a schedule and laundry information). If temporary relocation of parking is necessary, adjustments will be made at this stage.
6. Temporary Scaffold Installation & Various Works Our own scaffold team will set up the scaffolding, followed by high-pressure washing, substrate repair, sealing, exterior wall painting & tile repair, waterproofing, and work on metal parts and accessories in that order. A supervisor will inspect each process and take construction photos.
7. Completion Inspection, Scaffold Dismantling & Handover We will confirm the finished work in the presence of the customer and provide construction photos, a report on the paint used, and a warranty certificate.
8. Aftercare Maintenance We will send annual DM notifications, allowing for yearly inspections. Simple repairs such as partial sealing are provided free of charge.

Resident Communication, Additional Work Approval, Inspection Reports

Equally important as the construction itself is “when, what, and with what documents will we report”. At Kakeru Koumuten, we provide materials and reports in the following four situations.

* For management associations, it is smooth to decide in advance who will approve additional work (such as the chairman or repair committee) and the estimated amount that will require approval before the contract.

How Will Life Be During Construction? Impact on Residents

Large-scale repairs are principally conducted while residents remain in their homes. However, there will be limitations on daily life while scaffolding is in place. Most troubles can be prevented by providing prior notice, so Kakeru Koumuten Co., Ltd. thoroughly explains and posts information before construction begins.

How to Choose a Large-Scale Repair Contractor and Ordering Method

There are many large-scale repair contractors that cover Fujisawa City, and you may be unsure which one to choose. When requesting renovations for apartments, condominiums, or buildings, please confirm the following four points.

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 work with photos, it offers reassurance as a reference when you actually request their services.

Using ratings from Google and review sites as a reference when comparing large-scale renovation contractors can be effective!Be cautious if there are many negative reviews. If there are few reviews, also check the contractor’s track record, the content of their explanations, and their management system.

Large-scale renovation work involves not only the construction itself but also the potential for troubles with residents and nearby neighbors. Therefore, it is necessary to post updates on the progress of the work and information about laundry on bulletin boards to prevent issues before they arise. Kakeru Koumuten specializes in exterior work, and we receive many requests for exterior renovations of apartments and condominiums.

Check for warranties and aftercare services

When choosing a large-scale renovation company, make sure to check for warranties. If any issues such as leaks occur after construction, having a leak warranty from the contractor ensures that repairs can be made at no cost, providing peace of mind! Companies that offer warranty periods can be seen as having confidence in their work, which can serve as a 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, we send out annual direct mail for aftercare maintenance, allowing for yearly inspections. We also provide free responses for simple repairs such as partial sealing.

Obtain estimates from multiple contractors (at least 3 companies)

When requesting large-scale renovations, 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 by contractor, 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 points on the estimate (checklist)

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 conducting an investigation, it may incur additional time and costs. By managing in-house with knowledge and experience, responsible construction can be carried out at a reduced cost.

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 met 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 as follows:

Collusion and Improper Consulting Issues in Large-Scale Renovations and Self-Defense Measures

Latest 2026 In the large-scale renovation industry, improper orders linked to 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 in the Kanto region to design consulting firms (two design consulting firms were also subject to exclusion orders).

*Based on the announcement by the Japan Fair Trade Commission (September 28, 2026).

Three Typical Methods

Source: Ministry of Land, Infrastructure, Transport and Tourism “On the Proper Ordering of Large-Scale Renovation Work for Condominiums” (Notification dated April 3, Reiwa 5, PDF)

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 fees from consultants
• Include a penalty clause in the contract for cases of collusion
• Avoid concentrating information with a single consultant and verify specifications yourself

Frequently Asked Questions about Large-Scale Repairs in Fujisawa City

How much does large-scale repair in Fujisawa 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 between 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 company’s construction records, the cost for a two-story wooden apartment is around 2,000,000 to 4,000,000 yen, for a three-story steel or RC apartment it is about 4,000,000 to 9,000,000 yen, and for small condominiums or mixed-use buildings, it ranges from 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 needed, 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 signs of deterioration such as sealing degradation, tile lifting, or waterproof layer breakage 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 greater 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 approximately 4 to 6 months. Residents can remain in their homes during the construction. However, while scaffolding is in place, there may be restrictions on drying laundry outside and opening windows, so we take thorough measures to minimize the impact on daily life, including distributing pre-construction notices, providing information on the schedule and laundry through bulletin boards, and strictly adhering to working hours.

How long should we 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 an additional 3 to 6 months for construction. Overall, it is advisable to plan for around 2 years to proceed comfortably. 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 general meeting resolution).

Are there any subsidies available for large-scale repairs in Fujisawa City?

Neither Fujisawa City nor Kanagawa Prefecture has confirmed any subsidies specifically for large-scale repair work based on publicly available information. However, for condominium owners, if certain requirements are met, a reduction in fixed property tax can be obtained through the “Condominium Longevity Promotion Tax System” (Fujisawa City offers a 50% reduction for the following fiscal year). Fujisawa City also provides support for application costs for management plan certification and the creation of long-term repair plans, as well as free advisory services from condominium management consultants. If the work includes windows and insulation, it may qualify for “Advanced Window Renovation 2026” or “Future Eco Housing 2026.” The application timing and applicants vary by program, so please check the eligibility conditions and application procedures for each program before signing a contract or starting construction.

I heard that fixed property taxes can be reduced through large-scale repairs. Is that true?

Yes, it is true if the requirements are met. Under the Condominium Longevity Promotion Tax System, condominiums that are over 20 years old and have more than 10 units can receive a 50% reduction in fixed property tax for the following fiscal year, up to the equivalent of 100 square meters per unit, if they conduct large-scale repairs that contribute to longevity (for the second and subsequent repairs) (urban planning tax is not included). This applies to work completed between April 1, 2023, and March 31, 2027, and a declaration must be made within three months of completion. The declaration should be submitted to the Fujisawa City Asset Tax Division (direct line 0466-50-3511). The requirements include being a condominium that has received management plan certification or a management association that has received advice or guidance, and preparations such as raising repair reserve funds may take time, so it is recommended to start the process more than a year before construction.

Are there any changes to subsidies starting from the fiscal year 2026?

Yes, there are changes. The national “Child-Rearing Green Housing Support Project” has been abolished and restructured into the successor “Future 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” has started accepting bulk applications for collective housing from May 29, 2026 (the application process is 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?

There are mainly four options: ① Postpone low-urgency repairs based on a deterioration diagnosis, ② Review the scope and specifications of the work, ③ Check for support systems such as subsidies, ④ Consider increasing the repair reserve fund or financing from the Japan Housing Finance Agency. The Agency’s condominium common area renovation loans do not require collateral, and interest rates can be reduced by up to 0.6% per year by obtaining management plan certification and implementing energy-saving or seismic work. Please consult us regarding the decision to postpone waterproofing and tile peeling measures, as this often ends up being more costly.

Can you handle large-scale repairs for complexes or large condominiums with many buildings and units?

We can discuss this. We also accept inquiries for properties with many buildings and units. For properties with many buildings, it is important to conduct deterioration diagnoses for each building, plan the process for whether to do it all at once or divide it by building or year, and achieve consensus at the general meeting. Kakeru Koumuten Co., Ltd. considers condominiums with over 100 units as targets for cost estimates and will propose multiple process plans for comparison.

What happens to the 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, it may take time to secure alternative parking. Kakeru Koumuten Co., Ltd. will coordinate with you about nearby coin parking and monthly parking availability starting 2 to 3 months before construction begins.

Can I freely decide the color of the exterior walls?

The color of the building is generally determined by the management association or the owner; however, buildings that fall under the landscape planning notification requirements, as well as areas designated as landscape formation districts, scenic districts, or scenic areas, have specific procedures and standards. In Fujisawa City, outside of landscape formation districts and scenic districts, buildings over 10 meters in height, buildings with three or more stories excluding basements and a total floor area of over 1,000㎡, or buildings with a total floor area of over 1,500㎡ require notification for changes to the exterior or color, which must be submitted at least 30 days before construction begins. In landscape formation districts, all buildings are subject to this requirement regardless of size, and certification is needed in the scenic districts of Enoshima and Shonan C-X. In scenic areas (five locations in the city), the mayor’s permission is required for changes to the color of buildings. The city provides information on landscape and scenic areas through the Streetscape and Landscape Division (phone 0466-50-3508). We will also investigate what applies to your property during our survey. Sharing a color simulation to visualize the completed image can facilitate discussions with neighbors and the management association.

Are there differences in construction depending on the location, such as by the sea, near stations, residential areas, or complexes?

Fujisawa City has areas with different environments, including the coastline of Enoshima and Shonan Beach, around stations like Fujisawa, Shonandai, and Tsujido, residential areas like Kugenuma and Kataseyama, as well as large complexes and development sites. Depending on the location, there may be differences in road width, distance to neighboring properties, pedestrian traffic flow, and types of buildings (mixed-use buildings, wooden apartments, condominiums, complexes, etc.), which may require ingenuity in setting up scaffolding and transporting materials. Kakeru Koumuten Co., Ltd. has its own scaffolding team that will check the site and plan the transportation route and scaffolding layout. Additionally, the city publishes hazard maps for tsunamis, floods, and internal water, and buildings close to the sea focus on inspecting rust on metal parts, sealing, waterproof layers, and drainage from rooftops and properties in river areas or lowlands. The degree of deterioration varies by building, so we conduct individual diagnoses during on-site surveys.

Which should I choose, the responsibility construction method or the design supervision method?

For smaller numbers of units, 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, verification of price, specifications, and construction status is essential. Kakeru Koumuten Co., Ltd. provides detailed estimates that specify quantities, methods, and materials for each construction item, allowing you to compare with other companies on the same basis.

How can I detect collusion in large-scale repairs?

There are three typical methods: ① Pre-selecting the 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 collusion, 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, keeping minutes of the selection process, and including penalty clauses in contracts.

How many companies should I get estimates from?

We recommend at least three companies. If there are too many, it becomes difficult to compare, and if there are too few, competition does not occur. What is important is not the number of companies, but “comparing after creating the same playing field.” By creating a common specification sheet and quantity table and requesting under the same conditions, while making detailed breakdowns mandatory instead of accepting “one set” notation, it becomes clear whether the price difference is due to differences in range or unit price.

What is the difference if you have your own scaffolding?

Temporary construction accounts for about 20% of the costs of large-scale repairs (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 own scaffolding team can flexibly respond to sudden changes in the schedule or additional work. Kakeru Koumuten Co., Ltd. owns scaffolding materials for about 100 single-family homes and plans scaffolding on-site according to site conditions.

I’m in the middle of getting multiple estimates, but can I just have a look at the estimate?

Of course, that’s possible. If you bring in estimates from other companies, we will check for free whether the items, quantities, construction methods, and materials are appropriate, and we will provide 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 such as asbestos work supervisors and building material surveyors for asbestos-containing materials, and we handle everything from the legally required preliminary surveys to the roof overlay method and removal of asbestos-containing roofing materials. The availability of subsidies for investigation and removal costs in cases where sprayed asbestos is present may vary by year, so please check in advance with the city’s responsible office. We will also provide guidance from the investigation stage.

What happens if large-scale repairs are not done?

There are risks such as personal injury accidents due to falling exterior wall tiles, structural deterioration due to corrosion of rebar, leaks, and a decrease in asset value. Furthermore, for buildings subject to regular reporting under Article 12 of the Building Standards Act, investigations through comprehensive tapping and other methods 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. The submission destination for regular reports in Fujisawa City is the city’s Building Guidance Division or the Kanagawa Prefecture Building Safety Association, and according to the city’s guidance, certain sizes of “service-equipped housing for the elderly” in apartment buildings are targeted. Complex buildings including stores require individual confirmation (Fujisawa City Building Guidance Division Regular Report Section Phone 0466-50-3539). Even if not subject to statutory investigations, regular inspections and maintenance are essential, so please consult us if you are unsure about your judgment.

How much does large-scale repair for an apartment (about 10 units) cost?

For a two-story wooden 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 appearance through color simulations during repairs to improve occupancy rates.

If you are looking for a large-scale repair contractor in Fujisawa City, contact Kakeru Koumuten Co., Ltd.

Our company is based in Yokohama City and has handled many exterior wall renovations and large-scale repairs for condominiums and apartments in Fujisawa City. We are happy to respond not only to large-scale repair work but also to 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 scheduling compared to other companies, so we welcome multiple estimates!

Service Area for Large-Scale Repair Work

Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.

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