目次
- 1 If you are looking for a large-scale renovation contractor in Bunkyo-ku, Tokyo, come to Kakeru Koumuten Co., Ltd.
- 2 Reasons why Kakeru Koumuten is chosen for large-scale renovations in Bunkyo-ku, Tokyo
- 2.1 1. Equipment specialized for exterior renovations
- 2.2 2. Cost Reduction through In-House Management and Construction
- 2.3 3. Various Permits and Skilled Workers
- 2.4 4. Warranty and Aftercare
- 2.5 5. Flexible and Prompt Response
- 2.6 6. Human Resource Development
- 2.7 7. Consideration for Residents and Neighbors
- 2.8 8. Strict Quality Control
- 2.9 9. Exterior Wall Painting Color Simulation
- 3 Subsidies and Grants That May Be Applicable for Large-Scale Repairs in Bunkyo-ku, Tokyo
- 3.1 Condominium Long-Term Maintenance Promotion Tax System (Special Measures for Property Tax)
- 3.2 Tokyo Metropolitan Condominium Improvement Grant System
- 3.3 FY 2026 Subsidy Project for Insulation and Renewable Energy Promotion in Rental Housing
- 3.4 FY 2026 Renovation Cost Subsidy System [Special Nursing Homes, etc.]
- 4 Examples of Costs for Major Repairs
- 5 Customer Testimonials
- 6 Case Study of Exterior Renovation Work for a Mixed-Use Building
- 7 How to Choose a Large-Scale Renovation Contractor
- 8 If you are looking for a large-scale renovation contractor in Bunkyo-ku, Tokyo, please contact Kakeru Koumuten
If you are looking for
a large-scale renovation contractor in Bunkyo-ku, Tokyo,
come to Kakeru Koumuten Co., Ltd.
Kakeru Koumuten Co., Ltd. is a company capable of complete in-house construction for
temporary scaffolding installation, roof work, waterproofing, and exterior painting.
We have handled numerous large-scale renovations and exterior reforms for apartments, condominiums, and commercial facilities in Bunkyo-ku, Tokyo.
“Subsidies and costs available for large-scale renovations in Bunkyo-ku”
“How to choose a large-scale renovation contractor in Bunkyo-ku”
“Reasons why Kakeru Koumuten is chosen in Bunkyo-ku”
These topics will definitely be helpful for owners and management associations
considering repairs or exterior renovations for their apartments and condominiums, so please take a look!
To conclude, the most important thing when considering a large-scale renovation is
“multiple estimates”!
Let’s obtain at least three estimates from large-scale renovation companies that serve Bunkyo-ku!
Reasons why Kakeru Koumuten is chosen for large-scale renovations in Bunkyo-ku, Tokyo
One reason why we are entrusted with large-scale renovations in Bunkyo-ku is that
Kakeru Koumuten Co., Ltd. is based in Tokyo, but
“our unique approach to large-scale renovation work that cannot be imitated by other companies”
has received high praise from many customers.
“cost, quality, and plans” for exterior renovations of apartments, condominiums, and commercial facilities in Bunkyo-ku, Tokyo,
1. Equipment specialized for exterior renovations
At Kakeru Koumuten Co., Ltd., we have organized 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 5 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, allowing us to assemble scaffolding in-house.
By conducting scaffolding work with our own scaffolding team instead of outsourcing, we can cut costs on scaffolding work and provide quick and flexible responses.
We have approximately enough scaffolding materials for 100 single-family homes!
Storage of Materials in Our Large Warehouse
We store paints and base repair materials used for exterior renovations.
By ordering a large quantity of materials at once, we can purchase materials at a lower cost!
Additionally, we always have stock available, allowing us to provide swift responses in emergencies!
In-house Waste Separation
In large-scale renovations, various waste materials such as leftover paint, metal, and wood are generated.
While most contractors dispose of these materials together, separating and recycling waste materials can significantly cut waste disposal costs.
Exterior Renovation Dedicated Showroom
In the showroom, not only can you have meetings, but you can also
check actual exterior material samples and colors.
You can also perform color simulations for exterior wall painting and check thermal insulation properties using a heat insulation testing machine!
2. Cost Reduction through In-House Management and Construction
One of Kakeru Koumuten’s major strengths is our in-house management and construction.
From inquiries to project completion, everything is managed by Kakeru Koumuten in a consistent system, allowing us to keep costs down while delivering high-quality large-scale repairs.
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 entirely in-house!
Qualified professionals with specialized knowledge and experience will conduct inspections and actual construction at each stage!
3. Various Permits and Skilled Workers
We have obtained construction industry permits and permits for industrial waste collection and transportation!
We also have nationally certified sheet metal and painting technicians on staff, giving us confidence in our construction techniques.
We are capable of handling large-scale roofing projects for factories and other facilities!
We have qualified asbestos supervisors and asbestos surveyors on staff, allowing us to handle asbestos-containing roofing materials and conduct preliminary surveys.
4. Warranty and Aftercare
Most large-scale repair works come with a guarantee for almost all types of work, including “painting work,” “substrate repair work,” and “waterproofing work”!
Aftercare maintenance is available every year, and we send out notification DM each 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 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 respond quickly to emergency situations and urgent requests!
6. Human Resource Development
Our staff creates various models to improve their skills and conducts practical training.
Since different processing and techniques are required depending on the site, we regularly provide skill enhancement training to ensure that each staff member can respond appropriately.
We also educate on points to pay attention to and areas to check during each stage 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 also install bulletin boards at entrances to display project schedules and announcements!
Additionally, we ensure that the manners of those entering the site are thoroughly educated to minimize inconvenience to residents and neighbors.
8. Strict Quality Control
Each stage is inspected by a responsible person, and detailed construction photos are taken.
We use film thickness testing equipment and check sheets during inspections to prevent any oversight.
When performing exterior wall painting or waterproofing work, we confirm the quantity of used paint cans to ensure that the specified amount of paint is used, and we order paint in-house to prevent construction defects.
Of course, we will also take photos of the used paint and report them accordingly.
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 applying two-tone colors or making image changes, 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.
9-2 Confirm Actual Colors with Test Painting!
You can order samples of the paint you are considering and perform test painting on your exterior walls.
By conducting a test painting, you can confirm the actual color and sheen!
9-3 Exterior Renovation Simulation
We can also provide exterior simulations for apartments and condominiums as follows!
・Exterior wall color simulation (two-tone colors are also possible)
・Simulation for when metal siding is applied
・Simulation using accent materials like cornices and louvers
・Simulation for roof painting and roof replacement work is also possible
With the exterior renovation simulation, you can significantly reduce the risk of failure in image changes!
We hope that renovating the appearance of your apartment or condominium will help increase occupancy rates.
Subsidies and Grants That May Be Applicable for Large-Scale Repairs in Bunkyo-ku, Tokyo
In Bunkyo-ku, Tokyo, there are potential subsidies available when carrying out renovation work on apartments and condominiums!
For details, please contact our company or your local municipality! (As of June 2026)
Condominium Long-Term Maintenance Promotion Tax System (Special Measures for Property Tax)
There is a system that reduces property tax when large-scale repairs are made to condominiums.
◎ For more details, click here↓
Property tax reductions for large-scale repairs of condominiums! (PDF)
Is your condominium being regularly maintained? (PDF)
Tokyo Metropolitan Condominium Improvement Grant System
The Tokyo Metropolitan Government promotes proper maintenance and management of condominiums by providing grants (interest subsidies) in collaboration with the Japan Housing Finance Agency for management associations that plan improvements and repairs, such as exterior wall painting of common areas, rooftop waterproofing, and barrier-free modifications.
Additionally, installation work for solar power generation systems is also eligible for financing.
◎ For more details, click here↓
Grants for Repairs of Condominiums
Japan Housing Finance Agency
FY 2026 Subsidy Project for Insulation and Renewable Energy Promotion in Rental Housing
The Tokyo Metropolitan Government is promoting a project that intensively supports rental housing owners who implement insulation renovations that contribute to tenant health, soundproofing, and security, as well as providing support for expenses when introducing renewable energy power by combining solar power generation and low-voltage bulk electricity receiving.
◎ For more details, click here↓
Announcement of the Start of the Insulation and Renewable Energy Promotion Project for Rental Housing
FY 2026 Insulation and Renewable Energy Promotion Project for Rental Housing
FY 2026 Renovation Cost Subsidy System [Special Nursing Homes, etc.]
The Tokyo Metropolitan Government provides support for renovations of elderly care facilities.
◎ For more details, click here↓
Explainer Video on Renovation Cost Subsidies for Special Nursing Homes, etc.
[Bunkyo-ku] Subsidy for Creating Long-Term Repair Plans for Condominiums
In Bunkyo-ku, there is a subsidy for the costs of creating a long-term repair plan to carry out planned repairs.
◎For more details, click here↓
Subsidy for Creating Long-Term Repair Plans for Condominiums
【Brochure】Subsidy for Creating Long-Term Repair Plans for Condominiums (PDF)
Bunkyo-ku Long-Term Repair Plan Creation Subsidy Guidelines (PDF)
Examples of Costs for Major Repairs
This is an example of costs for each repair work!
| Repair Method | Materials Used | Cost |
| Tile Replacement | Existing Similar Tiles | per piece/2,000 yen to 4,000 yen |
| Repair of Floating Tiles and Mortar Areas | Epoxy Resin Injection | per square meter/3,000 yen to 5,000 yen (Varies depending on the degree) |
| Tile Joint Mortar Repair | Mortar for Tile Joints | per square meter/1,000 yen to 2,000 yen (Varies depending on the degree) |
| Concrete Spalling Repair | Reinforcement Rust Prevention Resin Mortar |
Per Location/1,000 yen～2,000 yen (Varies depending on the degree) |
| Crack Repair | Filler or Polymer Cement | m/100 yen～2,500 yen (Varies depending on the degree) |
※Costs and warranty periods vary depending on the 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 of charge.
Customer Testimonials
Case Study of Exterior Renovation Work for a Mixed-Use Building
| Construction Details |
| Partial replacement of damaged tiles Painting of auxiliary parts (pipes, water cut-off) Roof waterproofing work (urethane waterproofing) Exterior wall tile waterproofing (Seven S) Sealing work around sashes Repair of exterior wall tile mortar joints Removal of ivy |
| New Materials Used |
| Exterior wall tiles: Kunishiro tiles Painting of auxiliary parts: Radical silicone paint Roof waterproofing: High-strength urethane (Sarasene A) Exterior wall tile waterproofing: Seven S |
| Price Range |
| 4,000,000 – 4,100,000 yen |
| Construction Period |
| 45 days |
| Process Leading to Construction |
| Due to leaks occurring from several areas such as the exterior walls and the rooftop, we proposed waterproofing for the entire exterior wall. Seven S is a clear waterproofing material for tile exterior walls, and while it is somewhat expensive, its high waterproofing capability makes it a recommended material when leaks are occurring from multiple areas of the exterior wall. |
How to Choose a Large-Scale Renovation Contractor
There are many large-scale renovation contractors that cover Bunkyo-ku, Tokyo, and it can be confusing to decide which contractor to choose.
Therefore, when requesting renovations for apartments, condominiums, and buildings, make sure to check the following four points:
● Extensive experience in large-scale renovations
● Confirm the presence of warranties and aftercare services
● Obtain estimates from multiple contractors (at least three)
● Verify if they are self-managed
By checking the above four points, you will be able to choose a reliable contractor.
Extensive Experience in Large-Scale Renovations
Large-scale renovation contractors often have websites that showcase their exterior remodeling achievements.
Additionally, if they provide detailed explanations of the repair work with photos, it can give you peace of mind as a reference when you actually request repairs.
If you are concerned about whether the contractor you are about to hire will respond properly, choose one with extensive experience in large-scale renovations.
It is also effective to refer to reviews on Google and review sites when looking at skylight installation contractors!
If there are many negative reviews or no reviews at all, it may be wise to refrain from making a request.
Large-scale repair work involves not only the construction itself but also the potential for troubles with residents and neighbors. Therefore, it is necessary to prevent issues in advance by reporting the progress of the work and providing information about laundry through bulletin boards and other means.
Kakeru Koumuten Co., Ltd. specializes in exterior work, and we receive many requests for exterior renovations of apartments and condominiums.
Check for warranties and after-sales maintenance
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!
Additionally, companies that offer warranty periods demonstrate confidence in their work, serving as a criterion for selecting a contractor!
Warranty periods vary by contractor and the nature of the work, but typically range from 1 to 10 years.
Emergency repairs or partial fixes often do not come with a leak warranty.
Furthermore, some contractors offer after-sales services in addition to warranties, so be sure to check if the contractor you are considering has warranties and after-sales services.
Kakeru Koumuten Co., Ltd. sends out annual direct mail as part of our after-sales maintenance, allowing for inspections every year.
We also provide simple repairs such as partial sealing at no charge.
Obtain estimates from multiple contractors (at least three)
When requesting large-scale repairs, obtain estimates from multiple contractors.
It is important to obtain estimates from at least three companies and compare their reports and estimates!
Even for the same work, repair costs, warranties, and after-sales services may differ between contractors.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired repair contractor at the best price, obtaining estimates from multiple contractors is essential.
When comparing estimates, consider not only the cost but also
“Items in the estimate”
“Methods and materials for base repairs and exterior wall painting”
“Confirmation of the process”
and make detailed comparisons for your judgment! If the rank of auxiliary materials is low or if processes are skipped, costs can be reduced, so avoid making decisions based solely on price!
Especially regarding base repair work, since it may not be obvious from the exterior, be sure to check whether the repair method is appropriate for the condition of the base!
Check if it is managed in-house
Large-scale renovation work includes various tasks such as “substrate repair work,” “exterior wall painting,” “waterproofing work,” and “pipe replacement”!
The plan details will vary depending on the actual state of deterioration and the customer’s wishes.
If a contractor completely outsources to subcontractors, they may lack knowledge and experience, leading to proposals for repairs in the wrong areas or unnecessary work.
This can also result in additional time and costs as you need to investigate before requesting subcontractors.
By having knowledge and experience and managing in-house, responsible construction can be carried out while keeping costs down.
Moreover, if a contractor is outsourcing, one of the disadvantages is that their response may be slow in case of any trouble during construction.
It is safer to avoid having a company that has not actually met with the customer manage the construction.
Kakeru Koumuten Co., Ltd. is a company that carries out everything from temporary scaffolding installation to exterior wall painting and waterproofing work in-house.
Knowledgeable and experienced personnel will manage the construction!
If you are looking for a large-scale renovation contractor in Bunkyo-ku, Tokyo, please contact Kakeru Koumuten
Our company has handled many exterior wall renovations for condominiums and apartments in Bunkyo-ku, Tokyo. We are happy to assist not only with large-scale renovation work but also with partial repairs and leak repairs.
In urgent cases such as leaks, we may also be able to provide emergency measures, so please feel free to consult with 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 provide optimal solutions for your specific requests and future repair plans.
We carry out everything from temporary scaffolding work to roofing and exterior wall painting work completely in-house.
We are confident that we will not be outdone in terms of cost, quality, and efficiency compared to other companies in exterior work!
We welcome competitive estimates as we are confident in our work!
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and Tokyo.
List of Areas in Bunkyo-ku, Tokyo
Otsuka, Bunkyo-ku / Otowa, Bunkyo-ku / Kasuga, Bunkyo-ku / Koishikawa, Bunkyo-ku / Korakuen, Bunkyo-ku / Kohinata, Bunkyo-ku / Suidō, Bunkyo-ku / Sekiguchi, Bunkyo-ku / Sengoku, Bunkyo-ku / Sendagi, Bunkyo-ku / Nishikata, Bunkyo-ku / Nezu, Bunkyo-ku / Hakusan, Bunkyo-ku / Honkomagome, Bunkyo-ku / Hongo, Bunkyo-ku / Mukogaoka, Bunkyo-ku / Mejirodai, Bunkyo-ku / Yayoigaoka, Bunkyo-ku / Yushima
・When should large-scale renovations be carried out? An explanation of the optimal timing and the risks of postponement!
・Estimates are essential when conducting large-scale renovations! Key points for comparison and precautions!
・5 common troubles in large-scale renovations of condominiums! Thorough explanation of causes and prevention measures!
・What is waterproofing work in large-scale renovations? Thorough explanation of roles, signs of deterioration, and precautions!
・Insufficient funds for large-scale renovations… Explanation of how to deal with funding shortages and preparations you can do right now!
・What is surface repair, which is important in large-scale renovations? Thorough explanation of necessary reasons, signs of deterioration, and types of work!
・What is sealing work in large-scale renovations? Introduction to roles, methods, and tips for avoiding mistakes!
・What is tile repair, which is important in large-scale renovations? Explanation of signs of deterioration, types of work, and cost averages!
・What is exterior wall painting, which is important in large-scale renovations? Thorough explanation of necessity, signs of deterioration, and cost averages!
・For exterior renovations in Bunkyo-ku, Tokyo, trust Kakeru Koumuten Co., Ltd.!
・For roof renovations in Bunkyo-ku, Tokyo, trust Kakeru Koumuten Co., Ltd.!
・Leave your exterior wall painting in Bunkyo-ku, Tokyo to Kakeru Koumuten Co., Ltd.!
Consultations via LINE are also very welcome◎
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AAA is a young company with an average age in the early 20s, but our technology is second to none.
One of our greatest strengths is that we can do all of our own scaffolding, roofing, and painting work. In this industry, where work is generally divided, we are able to provide a complete set of services, which saves time and effort in management and reduces costs. Above all, if there is any trouble, we will come to you right away!
We can confidently declare this. We are the youngest and most friendly renovator in Kanagawa!
