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

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

Large-scale repair work that can be handled in Miura 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 by Building Diagnosis

It is not always necessary to perform all of the above works. 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 and compile them into a deterioration diagnosis report with photos, after which we will propose the scope of work.

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

The reason why we can take on large-scale repairs in Miura City is partly because “Kakeru Koumuten has a base in Yokohama City”, but also due to “our unique approach to large-scale repair work that cannot be imitated by other companies”, which has received high praise from many customers.

1. Equipment Specialized for Exterior Renovations

At Kakeru Koumuten, we have prepared the following warehouses and material storage areas to provide low-cost, high-quality exterior wall painting and waterproofing work for large-scale repairs. We have established five bases centered around Yokohama City for material storage and showrooms.

In-House Scaffolding Materials

We own the scaffolding materials necessary for temporary scaffolding required for large-scale repairs and can assemble 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!

Material Storage 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, we always have stock available, allowing for swift responses in emergencies!

In-House Waste Separation

Large-scale repairs generate various waste materials such as leftover paint, metal, and wood. At Kakeru Koumuten, we sort and recycle waste materials in-house, leading to cost reductions in waste disposal.

Showroom Dedicated to Exterior Renovations

In the showroom, 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 insulation tests using a heat insulation 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 repair, 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 on Staff

We have obtained permits for the construction industry and for the collection and transportation of industrial waste! We also have nationally certified sheet metal and painting skilled workers on staff, 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 materials containing asbestos investigators, so we can manage asbestos-containing roofing materials and conduct preliminary 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 a drone! During leak investigations, we can use 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 respond to urgent requests!

6. Staff Development

Our staff creates various models to enhance their skills and conducts practical training. Since different processing and techniques are required at the site, we regularly provide skill enhancement education to ensure each staff member can respond effectively. We also educate on points to be careful about and areas to check during each phase of large-scale repair work.

7. Consideration for Residents and Neighbors

During large-scale repair work, we not only notify residents and greet neighbors, but we also set up notice boards at entrances to display progress charts and announcements! Additionally, we ensure that the manners of visitors are thoroughly educated to minimize inconvenience to residents and neighbors.

8. Strict Quality Control

Each phase will undergo inspection by a responsible person, along with detailed photographs of the work. We use film thickness inspection equipment and check sheets to ensure that no inspections are overlooked. During exterior wall painting and waterproofing work, we check the quantity of used paint cans to confirm that the specified amount of paint is being used, and we prevent construction defects by ordering paint in-house. Of course, we will also photograph and report on the used paint.

9. Exterior Wall Painting Color Simulation

9-1 Self-Color Simulation

The simulations created by our company can be done using photos of your actual apartment or building!You can also perform simulations on your smartphone or computer. By 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 for paint samples to confirm the actual colors.

*Miura City has landscape regulations, and there are scenic areas and district planning zones. If you are changing the color of the exterior walls, you need to check the arrangements for each area in advance. Having a color simulation screen will make explanations at community meetings and general meetings proceed smoothly.

9-2 Confirm the actual color with a test paint!

You can order samples of the paint you are considering and perform 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

We can also perform the following exterior simulations for apartments and condominiums!
・Exterior wall color simulation (two-tone color is also possible)
・Simulation for when metal siding is applied
・Simulation for when accent materials such as cornices and louvers are used
・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.

Estimated costs for large-scale repairs in Miura City

The cost of large-scale repairs varies significantly depending on the size of the building, its deterioration status, the scope of work, and the materials used. First, please refer to the national market price 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 market price for condominiums is 750,000 to 1,500,000 yen per unit

According to a survey conducted by the Ministry of Land, Infrastructure, Transport and Tourism, which compiled 818 construction cases (FY 2021), approximately 70% of the costs for large-scale repairs are concentrated in the range of 750,000 to 1,500,000 yen per unit, with the most common price range being 1,000,000 to 1,250,000 yen. 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 “FY 2021 Survey on Large-Scale Repair Work for Condominiums” (200 companies, 818 cases) *The amounts do not include consumption tax and common temporary costs. The 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 “FY 2021 Survey on Large-Scale Repair Work for Condominiums” (Second survey of large-scale repair work. The overall average is 59.0% for construction-related work, 22.3% for temporary work, and 9.9% for miscellaneous expenses). *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 Repair, Exterior Painting, Waterproofing, Sealing)

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

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

The estimate for large-scale repairs is broadly divided into “temporary structures,” “substrate repair,” “sealing,” “exterior painting,” “waterproofing,” and “miscellaneous expenses.” Before comparing total amounts, please check what each item includes, how much, and at what cost.

Examples of Unit Prices for Repair Work

*Costs and warranty periods vary based on shape, quantity, substrate condition, and type of materials. For 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. The rate of deterioration differs for each side due to location, sunlight exposure, and ventilation, so confirming the condition of each side through an on-site survey and selecting paint suitable for the location can change durability.

Guidelines for Repair Reserve Funds and Options When Insufficient

The Ministry of Land, Infrastructure, Transport and Tourism’s guidelines indicate the estimated repair reserve fund 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 of condominiums 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 Miura City

In both Miura City and Kanagawa Prefecture, there was no publicly available information confirming subsidies specifically for large-scale renovation work (the city has a management plan certification system). The available options can be broadly categorized into four types. The eligibility and application status of these systems may change during the fiscal year, so please be sure to confirm with our company or the respective offices before contracting or commencing work.(As of October 8, 2026)

① Condominium Longevity Promotion Tax System (Reduction of Fixed Asset Tax)

For condominiums that meet certain requirements, conducting large-scale repairs (all three types: exterior painting, floor waterproofing, and roof waterproofing) that contribute to longevity will result in a reduction of the fixed asset tax for the residential portion (up to the equivalent of 100㎡ per unit). In Miura City, the fixed asset tax for the following year for eligible properties is reduced to one-third.

* The reporting destination is the Tax Division of Miura City (Property Tax Section – Phone 046-882-1111, Extension 243, 247, 248). For management plan certification and advice, please confirm with the Urban Planning Division (Phone 046-882-1111, Extension 272-274) before construction.

② Support for Condominium Management (Management Associations Start Here)

Both Miura City and Kanagawa Prefecture have not confirmed any subsidies for the construction costs of large-scale repairs. For consultations on the operation of management associations and long-term repair plans, you can utilize the prefecture’s advisor dispatch service.

Source: Kanagawa Prefecture “Advisor Dispatch to Condominium Management Associations”／Miura City “Guide to Housing Renovation Subsidy Program”

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

Based on the national system, this is a system certified by Miura City, with application acceptance starting in December of Reiwa 5. 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 Preservation Type), which is also one of the requirements for the Long Lifespan Promotion Tax System (certification alone does not guarantee tax reduction). The requirements for certification are to meet the “Miura City Condominium Management Appropriateness Guidelines” and to resolve the certification application at a meeting. According to national standards, this includes holding general meetings at least once a year, organizing management regulations, separating accounts for management fees and repair reserve funds, ensuring that the amount of arrears for more than three months is within 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 seven years, with a planning period of 30 years or more”. Certification is subject to renewal every five years. Applications cannot be made directly to the city; they must be submitted through the Japan Management Center for Condominiums’ “Management Plan Certification Procedure Support Service” after receiving prior confirmation from that system.

* Applications to the city are free of charge. The usage fee for the Condominium Management Center’s system is 10,000 yen (tax included) per application, and the prior confirmation review fee varies depending on the application content.

④ National Energy Saving Support | Housing Energy Saving 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 Quality Housing Renovation Promotion Project” will end in Fiscal Year 7, and there will be no implementation 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 Kanagawa Prefecture Subsidies (Application for Fiscal 2026 has ended)

※ The Existing Housing Energy Efficiency Renovation Subsidy does not cover common areas of rental apartments or units where the owner does not reside.

⑥ Financing System (Housing Finance Agency Condominium Sumairu Loan)

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

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 Miura City

Miura City is located at the southern tip of the Miura Peninsula, surrounded by the sea on three sides. The city has a fishing industry centered around Misaki Fishing Port, vegetable production taking advantage of the mild climate, and tourist spots such as Jogashima and Miura Coast. There are five scenic areas and four district plans within the city. Due to the presence of buildings in different environmental areas such as seaside structures exposed to sea breezes, residential areas on plateaus and valleys, and buildings around fishing ports and tourist spots, the way buildings deteriorate, the method of scaffolding, and the necessary procedures before construction vary depending on the location.

Source: Kanagawa Prefecture “Reiwa 7 National Census Results Summary (Population and Households in Kanagawa Prefecture)”／Miura City “Miura City Condominium Management Improvement Plan”／Same “About Scenic Areas”／Same “About District Plans”

Buildings in Miura City are divided into “four types”

In Miura City, the distance from the sea and the rules regarding appearance vary by location, so not only the age of the building but also the location of the building (coastal areas / areas around fishing ports / areas around stations with district plans / scenic areas / residential areas on plateaus and valleys) will affect the type of major repairs and procedures required in the next large-scale renovation. Please check which type your building falls under.

Source: Kanagawa Prefecture “Overview of Miura City” document／Miura City “About the Hazard Map”／Same “About District Planning”／Same “About Scenic Areas”／Same “Miura City Condominium Management Improvement Plan”

Four Factors Unique to Miura City That Damage Buildings

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

Source: Miura City “About Hazard Maps”／Same “Miura City Tsunami Hazard Map”／Town News “Miura City Landscape Ordinance Enforced” (July 10, 2015)／Miura City “About Scenic Areas”／Same “Miura City Condominium Management Improvement Plan”

Key Points to Consider When Proceeding with Construction in Miura City

*Kakeru Koumuten has five bases in Yokohama City and serves all areas of Miura City, including Misaki, Hatsuse, Minami-Shimoura, Jogashima, Moriso, and Matsuwa.

Deterioration Symptoms and Timing Requiring 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 the 12 to 15 year range, and the cycle tends to shorten with each occurrence. However, the actual judgment should be based on the condition of deterioration rather than the number of years, so if you observe symptoms like those listed below, we recommend an early on-site investigation.

Repair cycle guidelines by location (Ministry of Land, Infrastructure, Transport and Tourism guidelines)

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

Source: Ministry of Land, Infrastructure, Transport and Tourism “Guidelines for Long-Term Repair Planning” (Reiwa 6, June revision, 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 occurring in several places, and it was renovated by combining clear waterproofing for the tile exterior wall and waterproofing for the rooftop.

Exterior Renovation Work on a Mixed-Use Building (Tile Exterior Wall Waterproofing + Rooftop Waterproofing)

Customer Feedback

Flow from On-Site Investigation to Completion of Construction

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

1. Contact Us (Free) Please reach out 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 a survey of the exterior walls, check for cracks, sealing, and waterproof layers, and if necessary, use drones or thermal imaging to investigate the roof, high places, and leak areas. For properties in Miura City, we will check if they are along the coast or on a slope, whether they are along main roads or in residential areas, the distance to neighboring properties, the width of the road and delivery routes, pedestrian traffic, 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. Multiple plan proposals 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 color considerations.
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 own scaffold team will set up the scaffolding and proceed with high-pressure washing → substrate repair → sealing → exterior wall painting & tile repair → waterproofing → metal parts & ancillary work in that order. A supervisor will inspect each process 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 Maintenance We will send out annual DM notifications, and inspections can be conducted every year. Simple repairs such as partial sealing are provided free of charge.

Resident Communication, Additional Work Approval, Inspection Reports

Just as important as the construction itself is “when, what, and with what materials we will report”. At Kakeru Koumuten, we will 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 approximate 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 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 Miura City, and you may be unsure which one to choose. When requesting renovations for apartments, condominiums, or buildings, please check the following four points.

Extensive Experience in Large-Scale Repairs

Large-scale repair contractors often have websites that showcase their exterior renovation project achievements. If they provide detailed explanations of repair contents 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 repair contractors can be effective! 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 repair work involves not only the construction itself but also potential troubles with residents and nearby neighbors. 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, so we receive many requests for exterior renovations of apartments and condominiums.

Check for warranties and aftercare services

When choosing a large-scale repair company, make sure to check for warranties. If any issues such as leaks occur after the 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 be 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 offer aftercare services separate from warranties, so be sure to check for warranties and aftercare services.

At Kakeru Koumuten Co., Ltd., we send out annual direct mail for aftercare maintenance, allowing for yearly inspections. We also provide free assistance for simple repairs such as partial sealing.

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 type of work, costs can vary between contractors, and warranties and aftercare services may differ as well. 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! Lowering costs can be achieved by using lower-grade materials or skipping steps, 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 self-managed

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 state and customer preferences.

Contractors that completely outsource to subcontractors 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 at reduced costs becomes possible.

Furthermore, 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 with its own team, 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 payment orders for a total of 1.63788 billion yen 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).

*This content is 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 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 professionals or architects
• Document the contractor selection process in minutes to ensure transparency
• Confirm the reasons for unreasonably low consulting fees
• Include a penalty clause in the contract for cases of collusion
• Avoid concentrating information with a single consultant and verify specifications by the management association itself

Frequently Asked Questions about Large-Scale Repairs in Miura City

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

For condominiums, according to the Ministry of Land, Infrastructure, Transport and Tourism’s fiscal year 2021 survey, 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 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 it is 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 there are signs of deterioration in the sealing, lifting of tiles, or breaks in the waterproof layer, it is better 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 iron 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 1.5 to 3 months, and for condominiums with over 50 units, it is 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 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 a repair committee, building diagnosis, contractor selection, and general meeting resolutions, followed by 3 to 6 months for construction. Overall, it is advisable to plan for about 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 (which requires prior confirmation and general meeting resolution).

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

Neither Miura 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, it is possible to receive a reduction in fixed property tax under the “Condominium Longevity Promotion Tax System” (Miura City offers a one-third reduction for the following fiscal year). There are also free dispatch services for condominium advisors in Kanagawa Prefecture and a management plan certification system in the city. If the work includes windows and insulation, it may be eligible for “Advanced Window Renovation 2026” or “Mirai Eco Housing 2026.” The application timing and applicants differ by system, so please check the eligibility conditions and application procedures for each system before contracting or starting construction.

I heard that fixed property tax 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, if a condominium built for over 20 years and with more than 10 units conducts large-scale repairs that contribute to longevity (for the second or subsequent repairs), the fixed property tax for each unit can be reduced to one-third for the following fiscal year, up to an area equivalent to 100 square meters (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 Tax Division of Miura City Hall (Asset Tax Section, phone 046-882-1111, extensions 243, 247, 248). It is a requirement to be a condominium that has received management plan certification or a management association that has received advice and guidance, and since preparations such as raising repair reserve funds can take time, it is recommended to start the process more than a year before construction.

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

Yes, there are. The national “Child-Rearing Green Housing Support Project” has been abolished and reorganized into the successor “Mirai Eco Housing 2026 Project.” Management associations and management association corporations can also become joint project participants, allowing for insulation renovations in common areas. Additionally, the “Long-Term Excellent Housing Renovation Promotion Project” will end in fiscal year 2025, and it will not be implemented in fiscal year 2026. The “Advanced Window Renovation 2026 Project” began accepting bulk applications for apartment buildings starting May 29, 2026 (the application process is handled by registered contractors). Please be careful not to base your financial planning on outdated information.

相見積もりは、3社以上を目安に取得することをお勧めします。複数の業者から見積もりを取ることで、価格やサービス内容の比較が可能になり、より良い選択ができるようになります。また、相見積もりを通じて業者の信頼性や施工実績を確認することも重要です。翔工務店では、他社との比較がしやすいように、詳細な見積もりを提供していますので、ぜひご利用ください。

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

What is the difference if we have our own scaffolding?

In large-scale repair projects, temporary construction accounts for about 20% of the total cost (according to the Ministry of Land, Infrastructure, Transport and Tourism’s fiscal year 2021 survey). By not outsourcing scaffolding work, we can easily control costs in this area, and our in-house scaffolding team can respond flexibly to sudden changes in the schedule or additional work. Kakeru Koumuten Co., Ltd. owns scaffolding materials for approximately 100 single-family homes and plans scaffolding on-site according to the site conditions.

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

Of course, that’s possible. If you bring in estimates from other companies, we will check for free whether the items, quantities, methods, and materials are appropriate, and provide you with an estimate under the same conditions. We welcome competitive 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 who can conduct the legally required preliminary surveys, as well as cover methods and removal of asbestos-containing roofing materials. The availability of subsidies for investigation and removal costs in cases of sprayed asbestos may vary by year, so please check in advance with the municipal 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 reinforcing bars, 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 probing and other methods are required under certain conditions, such as if more than 10 years have passed since completion or exterior wall renovations. Miura City is an area under the jurisdiction of Kanagawa Prefecture, and the submission destination for periodic reports is Kanagawa Prefecture (Building Safety Division) or the Kanagawa Prefecture Building Safety Association. It is necessary to individually confirm whether complex buildings, including apartments and stores, are subject to this requirement (Kanagawa Prefecture Building Safety Division Phone: 045-210-1111, Extension 6259). 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 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 past performance (including scaffolding, substrate repairs, exterior wall painting, sealing, and waterproofing). It is common for apartments to undergo repairs every 10 to 15 years. For owners, there is an increasing trend to change the exterior appearance through color simulations at the same time as repairs, aiming to improve occupancy rates.

If you are looking for a large-scale repair contractor in Miura City, contact Kakeru Koumuten

Our company is based in Yokohama City and has handled many exterior wall renovations and large-scale repairs for condominiums and apartments in Miura 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 planning compared to other companies, so we welcome competitive estimates!

Large-Scale Repair Work Service Area

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

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