Leave the repair and renovation of condominiums and apartments in Higashikurume City, Tokyo to Kakeru Koumuten Co., Ltd.!

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

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

Large-scale repairs are not just “exterior wall 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 of the following work in-house, ensuring clear responsibility and coordination of the process.

Scope of Major Repairs Determined by 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, we conduct a free on-site survey to confirm the following and summarize it in a deterioration diagnosis report with photos, after which we will propose the scope of work.

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

The reason why we can be entrusted with large-scale renovations in Higashi Kurume City is our “initiatives that cannot be imitated by other companies in large-scale renovation work”, which has 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 own scaffolding materials for approximately 100 detached houses!

Storage of Materials in Our Large 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, since we always have stock available, we can provide speedy responses even in emergencies!

In-house Waste Separation

In large-scale renovations, various waste materials such as leftover paint, metal, and wood are generated. By sorting and recycling waste materials in-house, Kakeru Koumuten Co., Ltd. contributes to cost reduction of waste disposal fees.

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 ensuring 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’s sales or construction management, smooth communication is possible.

We can handle everything from temporary scaffolding installation to exterior wall painting, substrate repairs, waterproofing work, 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 also handle large-scale roofing work for factories! We have qualified personnel for asbestos work supervisors and building material asbestos investigators, so we can handle and conduct preliminary investigations of asbestos-containing roofing materials.

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 annually, 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 checked from high places using drones! During rain leak investigations, we can use a thermal imaging camera to help identify the cause of the leaks!

We will respond according to your wishes. We also accept emergency measures for sudden rain leaks! We will promptly respond to urgent requests or emergencies!

6. Staff Development

Our staff create various models for skill improvement and conduct practical training. Since different sites require various processing and techniques, we regularly provide skill enhancement education to ensure each staff member can respond appropriately. We also educate on points to be careful about 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 bulletin board at the entrance to display the construction schedule and notices! Additionally, we will thoroughly educate visitors on proper manners to minimize 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 there are no oversights in the inspections. During exterior wall painting and waterproofing work, we will check the quantity of used paint cans to confirm that the specified amount of paint is being used, and we will order paint in-house to prevent construction defects. 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 actual photos of your apartment or building!You can also perform the simulation on your smartphone or computer. By simulating and then applying a two-tone color or changing the image, we hope to enhance the stylish appearance and contribute to an increase in occupancy rates! Of course, we can also arrange paint samples for actual color confirmation.

* Higashikurume 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 30 days prior. In the areas of the 10 district plans within the city, a separate notification may be required. Whether 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 community association or management committee meetings.

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

You can order samples of the paint you are considering and conduct a sample paint application on your exterior wall. By performing a sample 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 changes! We hope that renovating the appearance of your apartment or condominium will help increase occupancy rates.

Cost Estimates for Major Repairs in Higashikurume City

The cost of major 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 construction.

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 aggregated 818 construction cases (FY 2021), approximately 70% of the costs for major repairs are concentrated in the range of 750,000 to 1,500,000 yen per unit, with the most common price range being 1,000,000 to 1,250,000 yen. 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 Large-Scale Renovation Work for Condominiums in FY2021” (200 companies, 818 cases) *Amounts do not include consumption tax or common temporary costs. Percentages do 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 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 equipment-related work, exterior works, and others are included. This is an average value and not a criterion for judging the appropriateness of individual estimates.

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

*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.

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

The estimate for large-scale repairs is broadly divided into “Temporary Work,” “Substrate Repair,” “Sealing,” “Exterior Wall Painting,” “Waterproofing,” and “Miscellaneous Expenses.” Before comparing total amounts, please check what is included in each item, how much, and at what cost.

Unit Price Examples 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 minimize waste.

*The estimated lifespan is a general guideline and may vary depending on sunlight, location, and substrate condition. Choosing paints with anti-algae and anti-mold properties can improve durability in shaded and humid areas.

Guidelines for Repair Reserve Funds and Options When Insufficient

The Ministry of Land, Infrastructure, Transport and Tourism guidelines indicate the estimated repair reserve fund on a monthly basis per unit area. Additional charges are necessary 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 (Reiwa 5 Fiscal Year Comprehensive Survey of Condominiums)

In the Reiwa 5 Fiscal Year Comprehensive Survey of Condominiums, 36.6% of management associations responded that “the repair reserve fund is insufficient compared to the plan.” There are four main options when insufficient.

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

In Higashikurume City, Tokyo, there are no subsidies confirmed that cover the entire construction cost of large-scale renovations. Potential options include the Tokyo Metropolitan Government’s condominium improvement construction subsidy (interest subsidy), the Tokyo “Stay in Tokyo” condominium subsidy, national energy-saving subsidies, and reductions in fixed asset tax. The available options can be broadly categorized into the following four types. The eligibility and application status of these systems may change even during the fiscal year, so please be sure to confirm with our company or the respective offices before contracting or starting construction. (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 qualifying condominiums are carried out, the property tax amount for the building in the following fiscal 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 Higashi-Kurume City is one-third (up to the tax amount equivalent to 100㎡ per unit), and urban planning tax is not included.

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

The contact point for the certification of management plans and reporting of management status for condominiums is Higashikurume City Urban Construction Department, Urban Planning Division, Planning Coordination Section (Phone 042-470-7762). Reporting of management status is a Tokyo Metropolitan system, applicable to condominiums with six or more units built before Showa 58.

Source: Higashikurume City “Condominium Management Plan Certification System”／Higashikurume City “Condominium Management Status Reporting System”／Higashikurume City “Condominium” Policy List／Higashikurume City “Reduction Measures for Newly Built Houses” (including longevity reduction)／Tokyo Metropolitan Government “Condominium Comprehensive Consultation Desk”／Tokyo Metropolitan Government “Condominium Management Advisor System” *Please note that the status of the systems and their reception may change.

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

This is a national system certified by cities that have established management optimization promotion plans. By receiving certification, you can meet one of the requirements for lower interest rates on the Housing Finance Agency’s “Flat 35” and condominium common area renovation loans, as well as the longevity promotion tax system (certification alone does not guarantee tax reduction). The certification criteria consist of 17 items in accordance with national guidelines. Main criteria include holding general meetings at least once a year, establishing management regulations, segregated accounting for management fees and repair reserves, ensuring that arrears do not exceed 10% of the total, and “having a long-term repair plan that includes two or more large-scale repair works and is created or reviewed within 7 years, with a planning period of over 30 years.”

*Certification is subject to renewal every 5 years, and approval from the general meeting is required for application. For the longevity promotion tax system, certification must be valid on both the assessment date (January 1) and at the time of declaration. The city’s contact point is the Urban Planning Division, Planning Coordination Section. Please check the city’s website for details on procedures and certification criteria.

④ National Energy Conservation Support | Housing Energy Conservation 2026 Campaign

Changes for Fiscal Year 2026The “Child-Rearing Green Housing Support Project” for Fiscal Year 2025 has been abolished and reorganized into the successor “Mirai Eco Housing 2026 Project.” Additionally, the “Long-Term Excellent Housing Renovation Promotion Project” will end in Fiscal Year 7 and will not be implemented in Fiscal Year 8. Please be careful not to base your financial plans on outdated information.

Mirai Eco Housing 2026 Project

Advanced Window Renovation 2026 Project

⑤ Subsidies and Support in Tokyo and Higashikurume City

* In Higashikurume City, there appears to be no subsidies specifically targeting the costs of large-scale repairs such as exterior painting or waterproofing. The city’s condominium policy page does not mention advisor dispatch, subsidies, or seminars. The city’s construction page lists subsidies for seismic diagnosis and retrofitting of wooden houses, as well as for the seismic reinforcement of buildings along designated emergency transport routes, but it is unclear whether the common areas of condominiums are included, as well as the amounts and requirements. There is also no confirmation of subsidies for asbestos investigation and removal. The Tokyo “Rental Housing Insulation and Renewable Energy Promotion Project” targets owners of entire rental housing buildings, and condominium management associations are not mentioned as eligible. 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 Higashikurume City

Higashikurume City is located in the central part of the Musashino Plateau, with an elevation of approximately 40 to 70 meters, on mostly flat land. The Kurokawa River and the Ochiai River flow east through the center of the city, and the Minamisawa Spring Group is the only one selected as “One of the Top 100 Waters of the Heisei Era” in Tokyo. According to Tokyo’s materials, the city is described as a “bedtown of Tokyo,” with many large housing complexes, primarily inhabited by families. The city was established in 1970. However, this information pertains to the entire city. Your building’s age and deterioration status will be individually confirmed through an on-site survey.

Source: Higashikurume City “Statistics Higashikurume (Reiwa 7 Edition)”／Tokyo “Higashikurume City” (Tama and Islands Introduction Page)　※Population and household numbers are based on the Basic Resident Register and differ from the census population.

Organizing the City and Buildings of Higashikurume from a Repair Perspective

The table below summarizes only the items that can be confirmed from public materials published by the city, the metropolitan government, and the UR Urban Development Corporation. Individual building circumstances cannot be determined from the overall city figures.

Four Factors to Consider for Large-Scale Repairs Unique to Higashikurume City

We have organized four factors to keep in mind for large-scale repairs based on the history of Higashikurume City and the city’s rules. The circumstances for each building vary, so individual confirmation will be made through on-site surveys.

Source: Higashikurume City “Statistics Higashikurume (Reiwa 7 Edition)”／Higashikurume City “Rivers and Spring Water”／UR Urban Development Corporation “Initiatives for Redevelopment in Hibarigaoka Housing Complex”／UR Rental Housing “Taki-yama”／Higashikurume City “Disaster Prevention Map / Flood Hazard Map”／Higashikurume City “District Plan”／Tokyo Metropolitan Police Department “Tanashi Police Station”／Tokyo Metropolitan Bureau of Construction “Northern Tama North Construction Office”

When landscape procedures may be required (for buildings)

When carrying out exterior wall repainting and other work within Higashikurume City, the notifications related to landscape and other matters are as follows, according to materials from the city and Tokyo Metropolitan Government.

Source: Tokyo Metropolitan Government “Landscape Formation through Notification System” / Higashikurume City “District Planning”　*The scale requirements of Tokyo’s 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 Tokyo Metropolitan Government’s page.

Points of Discussion When Advancing Construction in Higashikurume City

※Kakeru Koumuten Co., Ltd. has established five bases centered around Yokohama City and will visit Higashikurume City.

Signs of Deterioration and Timing for Major Repairs

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% of cases falling within 12 to 15 years, and the cycle tends to shorten with each occurrence. However, the actual judgment 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 Area (Ministry of Land, Infrastructure, Transport and Tourism Guidelines)

※The above are reference examples from the guidelines and are not uniform construction deadlines. Actual cycles are set according to the specifications, location conditions, and deterioration status of the building.

Source: Ministry of Land, Infrastructure, Transport and Tourism “Guidelines for Creating Long-Term Repair Plans” (Reiwa 6, June revision, PDF) / Ministry of Land, Infrastructure, Transport and Tourism “Survey on the Actual Conditions of Large-Scale Renovation Works 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 rooftop waterproofing 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 it is advisable to start the process 1 to 1.5 years before the desired start date to proceed with ample time.

1. Inquiry (Free) Please contact us via phone, form, or LINE. If you have estimates from other companies, just presenting those is also fine.
2. On-site Investigation & Building Diagnosis (Free) We will conduct a survey of the exterior walls, check for cracks, sealing, and the waterproof layer, and if necessary, investigate the rooftop, high places, and leak areas using drones or thermal imaging. For properties in Higashikurume City, we will also check the road width, distance from neighboring properties, delivery routes, parking, and drainage conditions of rooftops and balconies.
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. Multiple plans can also be proposed.
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 Higashikurume City, for buildings requiring notifications under Tokyo’s landscape plan or district plan, we will explain the procedures and color considerations as well.
5. Notification to Residents & Neighbors We will distribute construction notifications, conduct greetings to neighbors, and set up 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 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 each stage and take construction photos.
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 paint used, and a warranty certificate.
8. Aftercare 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 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 the repair committee) and the approximate amount that will require approval before signing 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 restrictions 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 Higashikurume City, and you may be unsure which contractor to choose. When requesting renovations for apartments, condominiums, or buildings, please confirm 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 offers reassurance as a reference when you actually request work.

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

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

Check for warranties and aftercare services

When choosing a large-scale repair company, check for the presence of 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 are often confident in their work, making this a key criterion for selecting a contractor.

Warranty periods vary by contractor and the nature of the work, but typically range from 1 to 10 years. Emergency repairs or partial fixes often do not come with a leak warranty. Some contractors also offer aftercare services separate from warranties, so be sure to check for warranties and aftercare services.

Kakeru Koumuten Co., Ltd. sends out annual direct mail for aftercare maintenance, allowing for yearly inspections. We also provide simple repairs such as partial sealing free of charge.

Obtain estimates from multiple contractors (at least 3 companies)

When requesting large-scale repairs, be sure to obtain estimates from multiple contractors. It is important to get estimates from at least 3 companies and compare their quotes and reports! Even for the same work, costs can vary between contractors, and warranties and aftercare services may differ. Additionally, obtaining multiple estimates makes price negotiations easier.

When comparing estimates, consider not only the cost but also the “items in the estimate,” “methods and materials for substrate repairs and exterior painting,” and “confirmation of the process.” Make detailed comparisons to make informed decisions! 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 methods are appropriate for the condition of the substrate!

Check this 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 details will change based on the actual deterioration condition and customer preferences.

If a contractor completely outsources to subcontractors, they may lack knowledge and experience, leading to proposals for repairs in irrelevant areas or unnecessary 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 can be performed at a reduced cost.

Moreover, contractors that outsource may also have delayed responses in case of any troubles 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 the approach.

Especially for management associations, it is necessary to decide “how to request” before “which company to hire.” The main ordering methods are the following three.

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).

※This content is based on the Japan Fair Trade Commission’s announcement (September 28, 2026).

Three Typical Methods

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 design management fees with the consultant
• Include a penalty clause in the contract for cases of collusion discovery
• Avoid concentrating information with a single consultant and verify specifications by the management association itself

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 also be effective. The main contact points available for management associations in Higashi Kurume City are as follows.

Source: Higashikurume City “Condominium Management Plan Certification System”／Higashikurume City “Condominium” Policy List／Tokyo Metropolitan Government “Comprehensive Consultation Desk for Condominiums”／Tokyo Metropolitan Government “Consultation Desk for Ordering Large-Scale Renovation Work”／Ministry of Land, Infrastructure, Transport and Tourism “Consultation Desk for Ordering Large-Scale Renovation Work”／Condominium Management Plan Certification System Consultation Dial

Frequently Asked Questions about Large-Scale Repairs in Higashikurume City

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

For condominiums, according to the Ministry of Land, Infrastructure, Transport and Tourism’s survey for the fiscal year 2021, about 70% of cases fall within the range of 750,000 to 1,500,000 yen (excluding consumption tax and common temporary construction costs), with the most common range being 1,000,000 to 1,250,000 yen. Based on our company’s construction records, the cost for a two-story wooden apartment is estimated at 2,000,000 to 4,000,000 yen, for a three-story steel or RC apartment at 4,000,000 to 9,000,000 yen, and for small condominiums or mixed-use buildings at 5,000,000 to 15,000,000 yen. The cost varies depending on the condition of the substrate and whether waterproofing 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 deterioration of sealing, lifting of tiles, or rupture of the waterproof layer is observed, it is advisable to carry out repairs without waiting for the cycle, as this can ultimately reduce costs. We will confirm and assess the age and condition of your building during the on-site survey.

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

For apartments, the estimated duration is 3 weeks to 2 months, for small condominiums or buildings 1.5 to 3 months, and for condominiums with over 50 units, about 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 advance notices, providing information on the schedule and laundry through bulletin boards, and strictly adhering to working hours.

How long should I expect from starting the planning to the completion of the construction?

For management associations, it typically takes about 1 to 1.5 years for the establishment of the repair committee, building diagnosis, contractor selection, and general meeting resolution, followed by 3 to 6 months for the construction. Overall, it is advisable to plan for about 2 years to proceed with some leeway. If you are using subsidies or tax incentives, please also factor in the time required for obtaining management plan certification (procedures for municipal certification).

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

As of now, there do not appear to be any subsidies for large-scale repair work for condominium buildings in Higashikurume City or Tokyo. Potential options include the Tokyo Metropolitan Government’s subsidy for condominium improvement work (interest subsidies for management associations using loans from the Japan Housing Finance Agency), the Tokyo “Stay in Tokyo” condominium subsidy, and reductions in fixed property tax (one-third in Higashikurume City). The city’s condominium policy page does not mention advisor dispatch or subsidies. If the work includes windows and insulation, there may also be eligibility for “Advanced Window Renovation 2026” and “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 contracting and starting construction.

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

It is true if the requirements are met. Under the Long-Term Condominium Promotion Tax System, if a condominium that meets certain criteria, such as being over 20 years old and having more than 10 units, conducts large-scale repairs that contribute to its 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 Higashikurume 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 applications must be submitted within three months of completion. The department to which applications should be submitted is not clearly stated on the city’s page, so please confirm with the Tax Division of the Citizens’ Department (phone 042-470-7727) before the construction. For certified management plan condominiums, raising the repair reserve fund to the certification standards is also a requirement, which may take 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?

There are four main options. ① Postpone low-urgency repairs based on a deterioration diagnosis for the next time, 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 renovation loans for common areas of condominiums 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 earthquake-resistant work. Please note that postponing waterproofing and tile peeling measures often ends up being more expensive, so please consult us for decisions on separating these issues.

What should I do if the repair reserve fund is insufficient?

Yes, it can be done. In Higashikurume City, there are sites with limited road widths and buildings that are close to neighboring properties. Kakeru Koumuten Co., Ltd. owns its own scaffolding materials and has its own scaffolding team, allowing us to plan the delivery route and scaffolding layout after checking the site. This is an area where additional costs can easily arise after seeing the site, so it is important to confirm the delivery route during the estimation stage.

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 where there is limited parking space on the premises, it may take time to secure an alternative parking location. Kakeru Koumuten Co., Ltd. will coordinate with you about the availability of nearby parking starting 2 to 3 months before construction begins.

Can I freely decide the color of the exterior walls?

Higashikurume City is not listed as a landscape administrative organization of Tokyo, and notifications regarding the landscape will be based on Tokyo’s landscape plan. Notifications must be submitted 30 days prior to applications for building confirmation (or 30 days prior to commencement if there are no related legal procedures), and whether repainting the exterior walls is subject to this depends on the location and scale of the building. The scale requirements can be confirmed with the Tokyo Metropolitan Bureau of Urban Development, Greenery and Landscape Division, Streetscape Landscape Section (Phone: 03-5388-3265). In the areas of the city’s 10 district plans, prior notification to the mayor is required, and the Urban Planning Division, Land Use Planning Section (Phone: 042-470-7782) is the contact point. We will also investigate this during our survey. Sharing a color simulation to visualize the completed image can facilitate discussions.

Why is the north-facing exterior wall particularly covered in moss and algae?

The north side receives less sunlight throughout the day, and when shadows from trees or neighboring buildings overlap, moisture can accumulate, making it easier for algae, moss, and mold to thrive. This is more likely to occur in locations close to trees. By thoroughly removing it with high-pressure washing and choosing paint with anti-algae and anti-mold properties, recurrence can be minimized. Additionally, we recommend checking for blockages in roof drains and gutters caused by fallen leaves, as these often lead to puddles on the roof and leaks.

Which method should I choose: responsibility construction method or design management method?

In smaller buildings, the burden of consulting fees tends to be heavier, so we believe that the responsibility construction method is often more suitable for small to medium-sized buildings. The design management method allows for comparison of construction companies under the same conditions since a third party creates the specifications; however, it incurs separate consulting fees and requires caution regarding conflicts of interest and collusion risks. Even with the responsibility construction method, verifying price, specifications, and construction status is essential. Kakeru Koumuten Co., Ltd. provides estimates that clearly outline quantities, methods, and materials for each construction item, allowing you to compare them on the same level as other companies.

How can I detect collusion in large-scale repairs?

There are three typical methods. ① Pre-selecting a contractor and having other companies submit only formal high estimates, known as “dummy estimates,” ② A consultant contracts at an extremely low design management fee and receives kickbacks from affiliated contractors, ③ Adding a portion of the contract amount as a back margin to the construction costs. Countermeasures include obtaining independent estimates, consulting a neutral third party, documenting the selection process in meeting minutes, and including penalty clauses in contracts.

How many companies should I get estimates from?

最低3社をおすすめします。多すぎると比較しきれず、少なすぎると競争が働きません。大切なのは社数よりも「同じ土俵を作ってから比べること」です。共通の仕様書や数量表を作って同一条件で依頼し、「一式」表記を認めず内訳明細を必須にすると、金額差が範囲の違いなのか単価の違いなのかがはっきりします。

What is the difference if we have our own scaffolding?

In large-scale repair work, temporary construction accounts for about 20% of the total cost (according to the Ministry of Land, Infrastructure, Transport and Tourism’s fiscal year 2021 survey). By not outsourcing scaffolding work, we can easily reduce 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 approximately 100 single-family homes and plans according to the site, even in areas with limited road width.

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

Of course, that’s 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 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 asbestos surveyors, and we 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 Higashikurume City. 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 from falling exterior wall tiles, structural deterioration due to corrosion of rebar, leaks, and a decrease in asset value. Furthermore, for buildings subject to periodic reporting under Article 12 of the Building Standards Act, investigations through full tapping and other methods are required under certain conditions, such as if more than 10 years have passed since completion or exterior wall renovations for tiled or mortar-finished walls. The scale of the joint housing subject to this requirement and the timing of the report can be confirmed in the list of “Buildings and Equipment Subject to Periodic Reporting and Reporting Timing” published by Tokyo. The applicable uses and scales may be revised, so please check with the Tama Building Guidance Office of Tokyo (phone 042-548-2029) for the latest information. Even if not subject to statutory inspections, 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 wooden two-story building with 6 to 10 units, the estimate is around 2 million to 4 million yen, and for a three-story steel or RC building 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 Higashikurume City, contact Kakeru Koumuten Co., Ltd.

We handle many exterior wall renovations and large-scale repairs for condominiums and apartments in Higashikurume 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 lose in terms of cost, quality, and scheduling compared to other companies, so we welcome multiple estimates!

Large-Scale Repair Work Service Area

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

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