Leave the repairs and renovations of condominiums and apartments in Kodaira City, Tokyo to Kakeru Koumuten Co., Ltd.!

Large-Scale Renovations for Condominiums, Apartments, and Buildings in Kodaira City

Large-scale repair work that can be handled in Kodaira City

Large-scale repairs are not just “exterior wall painting” or “waterproofing,” but rather a project that addresses the overall deterioration of the building while scaffolding is in place. At Kakeru Koumuten, we can handle all of the following work in-house, ensuring clear responsibility and coordination of the process.

Scope of Major Repairs Determined from Building Diagnosis

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

Reasons Kakeru Koumuten is Chosen for Large-Scale Renovations in Kodaira City

The reason why we can be entrusted with large-scale renovations in Kodaira City is our “initiatives that cannot be imitated by other companies in large-scale renovation work”, which have received high praise from many customers.

1. Equipment Specialized for Exterior Renovations

Kakeru Koumuten Co., Ltd. has 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 material storage and showrooms.

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 for 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 canprocure materials at a lower cost! Additionally, since we always have stock available, we can provide swift responses even in emergencies!

In-house Waste Separation

During large-scale renovations, various waste materials such as waste paint, metal, and wood are generated. Kakeru Koumuten reduces waste disposal costs by sorting and recycling waste materials in-house.

Showroom Dedicated to Exterior Renovations

In the showroom, you can not only have meetings but also check actual samples and colors of exterior materials. You can also perform color simulations for exterior wall painting and check thermal insulation properties using a thermal insulation testing machine!

2. Cost Reduction through In-House Management and Construction

One of Kakeru Koumuten’s major strengths is in-house management and construction.

By managing everything from inquiries to project completion in a unified system, we can keep costs down while providing high-quality large-scale repairs. Additionally, one representative will handle everything from the estimate to project completion. Since the person in charge does not change, whether it be sales or construction management, smooth communication is possible.

We can fully handle everything from temporary scaffolding installation to exterior wall painting, substrate repairs, waterproofing work, and tile repairs with our own team! 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 national 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 material asbestos surveyors, so we can handle asbestos-containing roofing materials and pre-investigations as well.

4. Warranty and Aftercare

Most large-scale repair works, including “painting work,” “substrate repair work,” and “waterproofing work,” come with a warranty!
Aftercare maintenance is available every year, and we send out notification DM annually.

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 promptly attend to urgent requests and emergencies!

6. Staff Development

Our staff create various models for skill enhancement and conduct practical training. Since different sites require various processing and techniques, we regularly provide skill improvement education to ensure each staff member can respond effectively. We also educate on points to be careful of and areas to check during each stage of large-scale repair work.

7. Consideration for Residents and Neighbors

During large-scale renovation work, we will not only notify residents and greet nearby residents, but also install a notice board at the entrance to display the construction schedule and announcements! Additionally, we will thoroughly educate visitors on proper manners to minimize any inconvenience to residents and neighbors.

8. Strict Quality Control

Each process will be inspected by a responsible person, and detailed construction photos will be taken. We will use film thickness inspection devices and check sheets to ensure that there are no oversights in the inspections. During exterior wall painting and waterproofing work, we will check the number of used paint cans to confirm that the specified amount of paint is being used, and we will prevent construction defects by ordering paint directly from our company. Of course, we will also take photos of the used paint and report them.

9. Exterior Wall Painting Color Simulation

9-1 Self Color Simulation

The simulations we create can be done using photos of your actual apartment or building!Simulations can also be done on your smartphone or computer. By simulating and then applying a two-tone color or making a change in image, we hope to enhance the stylish appearance and increase occupancy rates! Of course, we can also arrange paint samples for actual color confirmation.

*Kodaira City is not included in the list of landscape administrative organizations in Tokyo, and notifications based on Tokyo’s landscape plan (such as building confirmation applications) are involved up to 30 days prior. Furthermore, in the scenic areas within the city, changes to the exterior wall color also require permission under the Kodaira City Scenic Area Ordinance. Whether the exterior wall repainting is subject to this depends on the location and scale of the building, so prior confirmation is necessary. Having a color simulation screen will help facilitate explanations at the residents’ association or management committee meetings.

9-2 Confirm the Actual Color with a Test Paint!

You can order samples of the paint you are considering and conduct a test paint 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 colors are 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 change! We hope that renovating the appearance of your apartment or condominium will help increase occupancy rates.

Cost Estimates for Large-Scale Repairs in Kodaira City

The cost of large-scale repairs varies significantly depending on the size of the building, the degree of deterioration, the scope of work, and the materials used. First, please refer to the national average based on public statistics, then to our company’s estimates based on construction performance by scale, and finally to 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 collected 818 construction cases (FY 2021), the construction costs for large-scale repairs are concentrated at approximately 70% 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 construction costs, so the conditions differ from the current total construction costs including tax.

Source: Ministry of Land, Infrastructure, Transport and Tourism “Survey on Actual Conditions of Large-Scale Renovation Work for Condominiums in FY2021” (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 “Survey on Actual Conditions of Large-Scale Renovation Work for Condominiums in FY2021” (Second survey of large-scale renovation work. Overall average is construction-related 59.0%, temporary work 22.3%, miscellaneous expenses 9.9%). *The total does not equal 100% because it includes equipment-related work, exterior work, 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 Repairs, Exterior Wall Painting, Waterproofing, Sealing as a Whole)

*The above estimates are based on Kakeru Koumuten’s construction records and may vary depending on the presence of roofing work, steel work, plumbing, etc. For condominiums, please also consider the amount calculated by multiplying the national statistics (750,000 – 1,500,000 JPY per unit) by the number of units as a guideline.

Breakdown of Costs for Temporary Works, Substrate Repairs, Exterior Walls, and Waterproofing

The estimate for large-scale repairs is broadly divided into “Temporary Works,” “Substrate Repairs,” “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 the next major repair will be 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. For shaded and humid surfaces, choosing paints with anti-algae and anti-mold properties can change durability.

Guidelines for Repair Reserve Funds and Options When Insufficient

The Ministry of Land, Infrastructure, Transport and Tourism guidelines indicate the standard 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 Reiwa 5 Fiscal Year Comprehensive Survey of Condominiums, 36.6% of management associations reported that “the repair reserve fund is insufficient compared to the plan.” There are four main options when there is a shortfall.

Subsidies, Tax Systems, and Loans to Check for Large-Scale Renovations in Kodaira City

In Kodaira City, Tokyo, there are no subsidies confirmed that cover the entire construction costs for large-scale renovations. The possibilities include the Tokyo Metropolitan Government’s condominium improvement work subsidy (interest subsidies), specific projects, national energy-saving subsidies, and reductions in fixed asset tax. The main types available are broadly divided into four categories. The eligibility and application status of these systems may change 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 15, 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 certain condominium units meeting specific requirements are carried out, the property tax amount for the following year will be reduced. The reduction rate is determined by the municipality within the national range (one-sixth to one-half). The reduction rate in Kodaira City is one-third (up to the tax amount equivalent to 100㎡ per unit), and urban planning tax is not included.

② City and Prefectural Contact Points (Management Associations should start here)

The contact point for the certification of management plans for condominium developments is Kodaira City Urban Development Department, Urban Planning Division, Planning Section (Phone 042-346-9554). The reporting of management status is based on Tokyo Metropolitan Ordinance and applies to residential condominiums with more than six units built before December 31, 1983. The reporting destination is the municipality where the building is located.

Source: Kodaira City “About the Condominium Management Plan Certification System”／Kodaira City “The Condominium Management Status Reporting System has Started”／Kodaira City “Property Tax Reduction System for Condominiums that Undergo Large-Scale Repairs”／Tokyo Metropolitan Government “Comprehensive Consultation Desk for Condominiums”／Tokyo Metropolitan Government “Condominium Management Advisor System”　*The contact points and reception status of the systems may change. The page for management plan certification cannot be read, and the fees and standards have not been confirmed.

③ Management Plan Certification System (Entry for Tax and Interest Rate Benefits)

This is a system certified by Kodaira City, and upon receiving certification, you can meet one of the requirements for the Japan Housing Finance Agency’s “Flat 35” and the interest rate reduction for condominium common area renovation loans, as well as the long-term durability promotion tax system (certification alone does not guarantee tax reduction). The certification standards are based on national guidelines, and it has not been confirmed whether there are any unique city standards. The main criteria include holding a general meeting at least once a year, maintaining management regulations, separate accounting for management fees and repair reserves, overdue amounts within 10% of the total, and “having a long-term repair plan that includes two or more large-scale repair works, created or reviewed within seven years, with a planning period of 30 years or more”.

*Certification is subject to renewal every five years, and approval from the general meeting is required for application. For the long-term durability promotion tax system, certification must be valid both at the assessment date (January 1) and at the time of declaration. Please check the city’s website for details on procedures and certification standards.

④ National Energy Saving Support | Housing Energy Saving 2026 Campaign

Changes for FY 2026The “Child-Rearing Green Housing Support Project” for FY 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 FY 2027 and will not be implemented in FY 2028. Please be careful not to establish financial plans based on outdated information.

Mirai Eco Housing 2026 Project

Advanced Window Renovation 2026 Project

⑤ Subsidies and Support in Tokyo and Kodaira City

* In Kodaira City, there are no confirmed subsidies for asbestos investigation and removal, heat insulation painting, insulation, or loan mediation and interest subsidies for management associations (the city’s page on asbestos only provides information on regulations for demolition work, and no mention of subsidies could be found). The reduction of fixed asset tax associated with seismic and energy-saving renovations for residential properties is directed at individual homes. The Tokyo Metropolitan “Rental Housing Insulation and Renewable Energy Concentration Promotion Project” targets owners of entire rental housing buildings, and condominium management associations are not included. There are no confirmed city subsidies specifically for exterior painting. Please be sure to check the conditions before signing a contract.

⑥ Financing System (Housing Finance Agency Condominium Sumairu Loan)

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

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

Cases where fire insurance can be used and cases where it should not be used

Building conditions and repair points in Kodaira City

Kodaira City is located in the northeastern part of the Tama region of Tokyo, on the Musashino Plateau, approximately 26 km west of the city center. It opened as a rural area near Edo with the completion of the Tamagawa Josui (in the 3rd year of the Shoō era, 1654), securing irrigation water, and in the early Showa period, residential land development progressed in the Gakuen area. After the war, the population surged due to the construction of public housing and the influx of factories, according to city documents. However, this is general information about the city. Your building’s age and deterioration condition will be individually confirmed through a site survey.

Source: Kodaira City “Summary of Results of the 2020 National Census”／Kodaira City “Designation of Landslide Hazard Areas by Tokyo”／Kodaira City “City Profile”　*The latest population from the basic resident register could not be confirmed as the city page could not be loaded. The update of the landslide hazard area page was on October 20, 2020.

Organizing the city and buildings of Kodaira from a repair perspective

The table below summarizes only the items that could be confirmed from public documents of the city and the prefecture. Individual building circumstances cannot be determined from the overall city figures.

Four Key Factors to Consider for Large-Scale Repairs Unique to Kodaira City

We have organized four factors to keep in mind for large-scale repairs based on the development of Kodaira City and its rules. Each building has its own circumstances, so individual confirmation will be made through on-site investigations.

Source: Kodaira City “City Profile”／Kodaira City “Old Kodaira”／Kodaira City “Overview of Kodaira City”／Kodaira City “Hazard Map”／Kodaira City “Permit Application Based on Scenic District Regulations”／Kodaira City “Road Occupancy Permit Application”

When Scenic Procedures Are Required (Buildings)

When performing exterior wall repainting and other related activities in Kodaira City, the notifications and permits regarding scenery are as follows according to materials from the city and Tokyo Metropolitan Government.

Source: Tokyo Metropolitan Government “Landscape Formation by Notification System”／Kodaira City “Permit Application Based on Scenic District Regulations”／Kodaira City “Notification of District Planning”／Kodaira City “Overview of Procedures and Standards for Development Projects”　*The scale requirements for the Tokyo Metropolitan Landscape Plan have not been confirmed, so numerical values are not included in the text. The list of landscape administrative organizations is based on the information on the Tokyo Metropolitan Government’s page.

Points of Discussion When Advancing Construction in Kodaira City

* Kakeru Koumuten has established five bases centered around Yokohama City and will visit Kodaira City.

Signs of Deterioration and Timing for Major Repairs

Generally, major repairs are estimated to occur 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 12 to 15 years, and the cycle tends to shorten with repeated occurrences. However, the actual judgment should be based on the deterioration condition rather than the number of years, so if you observe symptoms like those listed below, an early on-site inspection is recommended.

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

* The above are reference examples from the guidelines and are not uniform construction deadlines. The actual cycle will be set according to the building’s specifications, location conditions, and deterioration status.

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 Large-Scale Renovation 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 Co., Ltd. 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 for Mixed-Use Building (Tile Wall Waterproofing + Roof Waterproofing)

Customer Feedback

Flow from On-Site Survey to Completion of Work

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

1. Inquiry (Free) Please contact us via phone, form, or LINE. If you have estimates from other companies, just presenting them is fine.
2. On-site Investigation & Building Diagnosis (Free) We will conduct an exterior wall survey, check for cracks, sealing, and waterproof layers, and if necessary, investigate the rooftop, high places, and leak areas using drones or thermal imaging. For properties in Kodaira City, we will also check the road width, distance to neighboring properties, delivery routes, parking, and drainage conditions for rooftops and balconies.
3. 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 plan proposals are also possible.
4. Plan Decision & Contract Confirm colors through color simulations, paint samples, and trial painting. For management associations, we will assist in preparing materials for the general meeting. In Kodaira City, for buildings requiring notifications under Tokyo’s landscape plan or permits in scenic districts, we will explain the procedures and color considerations as well.
5. 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 schedule and laundry information). If temporary relocation of parking is necessary, we will coordinate this at this stage.
6. Temporary Scaffold Installation & Various Works Our in-house scaffold 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 at each stage.
7. Completion Inspection, Scaffold Dismantling & Handover We will confirm the finish in the presence of the customer and provide construction photos, a report on the paints used, and a warranty certificate.
8. Aftercare We will send annual DM notifications, and inspections can be conducted every year. 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 materials we report”. At Kakeru Koumuten, we will provide materials and reports in the following four scenarios.

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

How will life be during construction? Impact on residents

Large-scale repairs are principally carried out 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 is thorough in its pre-construction explanations and postings.

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

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

Have 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 gives peace of mind as a reference when actually making a request.

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

Large-scale renovation work involves not only the construction itself but also the potential for troubles with residents and neighboring residents. Therefore, it is necessary to post updates on the progress of the work and information about laundry on bulletin boards to prevent troubles before they occur. 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 the work is completed, 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 type of work, but typically range from 1 to 10 years. Emergency repairs or partial fixes often do not come with leak warranties. Some contractors also provide aftercare services separate from warranties, so be sure to check for warranties and aftercare services.

Kakeru Koumuten sends 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 renovations, be sure to obtain estimates from multiple contractors. It is important to get estimates from at least 3 companies and compare the estimates and reports from each! Even for the same type of work, costs can vary between contractors, as can warranties and aftercare services. 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.” Make detailed comparisons to make informed decisions! If the rank 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 this on the estimate (checklist)

Confirm whether 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.

Contractors that completely outsource to subcontractors may lack knowledge and experience, leading to proposals for repairs in inappropriate areas or meaningless work. If you investigate and then request a subcontractor, it may incur additional time and costs. By having knowledge and experience and managing in-house, responsible construction that keeps costs down becomes possible.

Moreover, contractors that outsource may also be slow to respond if any troubles occur 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 installation to exterior wall painting and waterproofing work in-house, managed by knowledgeable and experienced personnel!

There are three ordering methods. The choice affects how the process proceeds.

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.

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 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).

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

Three Typical Schemes

Source: Yokohama City “What is collusion in large-scale repair work for condominiums?” / Ministry of Land, Infrastructure, Transport and Tourism “On the proper ordering of large-scale repair 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 specialists or architects
• Document the vendor selection process in meeting minutes to ensure transparency
• Confirm the reasons for unusually 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

Contact Points for Third-Party Consultation

If you are unsure about reading estimates or how to proceed with vendor selection, consulting a third party separate from the construction company can be effective. The main contact points available for management associations in Kodaira City are as follows:

Source: Kodaira City “About the Management Plan Certification System for Condominiums”／Kodaira City “Consultation at City Hall and Other Locations”／Tokyo Metropolitan Government “Comprehensive Consultation Desk for Condominiums”／Tokyo Metropolitan Government “Consultation Desk for Ordering Large-Scale Repair Work”／Ministry of Land, Infrastructure, Transport and Tourism “Consultation Desk for Ordering Large-Scale Repair Work”／Condominium Management Plan Certification System Consultation Dial

Frequently Asked Questions about Large-Scale Repairs in Kodaira City

How much does large-scale repair in Kodaira City cost?

For condominiums, according to the Ministry of Land, Infrastructure, Transport and Tourism’s survey for the fiscal year 2021, about 70% 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 estimated costs are 2,000,000 to 4,000,000 yen for a two-story wooden apartment, 4,000,000 to 9,000,000 yen for a three-story steel or RC apartment, and 5,000,000 to 15,000,000 yen for small condominiums or mixed-use buildings. The costs vary depending on the condition of the substrate and whether waterproofing and roofing work is required, so we will provide an estimate through a free on-site survey.

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 there are signs of deterioration in the sealing, lifting of tiles, or breakage of the waterproof layer, it is better to carry out repairs without waiting for the cycle, as this can ultimately reduce costs. We will check the age and condition of your building during the on-site survey to make a judgment.

How long does the construction period take? Can residents stay during the work?

For apartments, the period is approximately 3 weeks to 2 months, for small condominiums and buildings it is about 1.5 to 3 months, and for condominiums with more than 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 take thorough measures to minimize the impact on daily life, such as distributing notifications before construction, providing information on the schedule and laundry on 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 the establishment of the repair committee, building diagnosis, selection of contractors, and resolution at the general meeting, followed by 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 required to obtain management plan certification (procedures for municipal certification).

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

As of now, there do not appear to be any subsidies available for large-scale repair work for condominiums in Kodaira City or Tokyo. Possible options include the Tokyo Metropolitan Government’s subsidy for condominium improvement work (interest subsidies for management associations utilizing loans from the Japan Housing Finance Agency), the Tokyo “Stay in Tokyo Condominium” subsidy, and reductions in fixed property tax (one-third in Kodaira City). The city’s earthquake resistance subsidy covers costs for seismic diagnosis of wooden houses and guidelines for buildings along specific emergency transportation routes. The city’s energy-saving equipment subsidies apply to the installation of equipment. If your work includes windows and insulation, you may also qualify for “Advanced Window Renovation 2026” or “Future Eco Housing 2026.” The timing of applications and applicants varies 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 with large-scale repairs. Is that true?

If the requirements are met, it is true. 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 amount for the following year will be reduced. The reduction rate in Kodaira City is one-third, applicable to tax amounts for up to 100 square meters per unit (in the 23 wards of Tokyo, it is one-half). The eligible work must be completed between April 1, 2023, and March 31, 2027, and a declaration must be made to the Kodaira City Tax Division, Building and Depreciable Assets Section (phone 042-346-9525) within three months of the completion date. Before declaring, it is advisable to first contact the Tax Division to confirm the requirements, and the representative of the management association can declare on behalf of the owners. For certified management plan condominiums, it is also a requirement to raise the repair reserve fund to the certification standard, which takes time to prepare, so we recommend starting the process more than a year before construction.

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

You should obtain estimates from at least three companies. This allows for a more comprehensive comparison of prices and services, ensuring you make an informed decision. It’s important to consider not only the cost but also the quality of work and the reputation of the contractors. Gathering multiple estimates can help you identify any discrepancies and ensure transparency in the bidding process.I 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 “to create the same playing field before comparing.” By creating a common specification and quantity table and requesting estimates under the same conditions, while requiring detailed breakdowns instead of a lump sum, the differences in amounts will clearly indicate whether they are due to differences in range or unit prices.

What is the difference if we own 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, it is easier to control costs in this area, and our in-house 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 according to the site, even in areas with limited road width.

Can I just have the estimate looked at while in the middle of comparing estimates?

Of course, that is possible. If you bring 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 comparative 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, including asbestos work supervisors and investigators of buildings containing asbestos, who can handle everything from the legally required preliminary surveys to the cover method and removal of asbestos-containing roofing materials. We have not confirmed any municipal subsidies for asbestos surveys and removals in Kodaira City (the city’s page provides information on regulations for demolition and other construction). The availability of subsidies may change from year to year, so please check with the municipal office. We will also provide guidance based on the survey results.

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 periodic reporting under Article 12 of the Building Standards Act, investigations through full 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 tiles or mortar finishes. The scale of apartment buildings subject to this requirement and the timing of reports can be confirmed on the city’s page, which lists “buildings and building equipment subject to periodic reporting and reporting timing.” The applicable uses and scales may be revised, so please check with the Structural Equipment Division of the Kodaira City Building Guidance Section (phone 042-312-1145) for the latest information. 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 wooden two-story buildings with 6 to 10 units, the estimate is around 2 million to 4 million yen, and for three-story steel or RC buildings with 10 to 20 units, it is around 4 million to 9 million yen based on our company’s track record (including scaffolding, substrate repairs, exterior wall painting, sealing, and waterproofing). It is common to carry out repairs for apartments 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 Kodaira City, contact Kakeru Koumuten Co., Ltd.

We handle many exterior wall renovations and large-scale repairs for condominiums and apartments in Kodaira City. We are happy to assist not only with large-scale repair work but also with partial repairs and leak repairs. “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 be outdone by others in terms of cost, quality, and planning, so we welcome comparative estimates!

Large-scale Repair Work Service Area

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

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