目次
- 1 If you are looking for a large-scale repair contractor in Shinjuku-ku, Tokyo, come to Kakeru Koumuten
- 2 Reasons why Kakeru Koumuten is chosen for large-scale repairs in Shinjuku-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 Possible Subsidies and Grants for Large-Scale Renovations in Shinjuku-ku, Tokyo
- 3.1 Condominium Long-Term Life Promotion Tax System (Special Measures for Property Tax)
- 3.2 Tokyo Condominium Improvement Construction Subsidy System
- 3.3 FY 2026 Subsidy Project: Promotion of Insulation and Renewable Energy in Rental Housing
- 3.4 FY 2026 Renovation Cost Subsidy System [Special Nursing Homes, etc.]
- 4 Examples of Costs for Large-Scale Renovations
- 5 Customer Testimonials
- 6 Case Study of Exterior Renovation Work on 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 Shinjuku-ku, Tokyo, please contact Kakeru Koumuten
If you are looking for
a large-scale repair contractor in
Shinjuku-ku, Tokyo, come to Kakeru Koumuten
Kakeru Koumuten is a complete in-house contractor capable of handling
everything from temporary scaffolding installation to roof work, waterproofing, and exterior painting.
We have undertaken numerous large-scale repairs and exterior renovations for apartments, condominiums, and commercial facilities in
Shinjuku-ku, Tokyo.
“Subsidies and costs available for large-scale repairs in Shinjuku-ku”
“How to choose a large-scale repair contractor in Shinjuku-ku”
“Reasons why Kakeru Koumuten is chosen in Shinjuku-ku”
These topics will definitely be useful 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 large-scale repairs is
“multiple estimates”!
Let’s obtain at least 3 estimates from large-scale repair companies that cover Shinjuku-ku!
Reasons why Kakeru Koumuten is chosen for large-scale repairs in Shinjuku-ku, Tokyo
One reason why we are entrusted with large-scale repairs in Shinjuku-ku is that
“the fact that Kakeru Koumuten is based in Tokyo” is one reason, but
“our unique approach to large-scale repair work that cannot be imitated by other companies”
has received high praise from many customers.
“costs,” “quality,” and “plans” for exterior renovations of apartments, condominiums, and commercial facilities in Shinjuku-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 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, 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 procure materials at a lower cost!
Additionally, we always have stock available, allowing us to provide swift responses even in emergencies!
In-house Waste Separation
In large-scale renovations, various types of waste materials such as leftover paint, metal, and wood are generated.
While most contractors dispose of these materials together, by sorting and recycling waste materials, significant cost reductions in waste disposal can be achieved.
Exterior Renovation Dedicated Showroom
In the showroom, not only can you have meetings, but you can also
check actual samples and colors of exterior materials.
You can also perform color simulations for exterior wall painting and check heat 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 will be in charge, 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, and tile repairs with complete in-house construction!
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 as well as permits for industrial waste collection and transportation!
We also have nationally certified sheet metal workers and painting specialists on staff, giving us confidence in our construction techniques.
We are capable of handling large-scale roofing projects for factories and more!
We also 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 guarantees 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 are difficult to check from high places by utilizing drones!
During rain 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 rain leaks!
In emergencies or urgent requests, we will respond promptly!
6. Human Resource Development
Our staff creates various models to enhance their skills and conducts practical training.
Since different processing and techniques are required at each site, we regularly provide skill enhancement training to ensure that each staff member can respond appropriately.
We also educate our team on points to pay attention to 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 install bulletin boards at entrances to display project schedules and announcements!
Additionally, we ensure that the manners of those entering the site are taught thoroughly to minimize any inconvenience to residents and neighbors.
8. Strict Quality Control
Each phase of the project is inspected by a responsible person, and detailed construction photos are taken.
We use film thickness testing equipment and check sheets during inspections to ensure that no inspections are missed.
When performing exterior wall painting or waterproofing work, we check the number of used paint cans to confirm that the specified amount of paint has been used, and we order paint directly from our company 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 the simulation 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 doing a test paint, 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 such as cornices and louvers
・Simulation for roof painting or roof replacement work is also possible
The risk of failure in image changes can be greatly reduced with exterior renovation simulations!
We hope that renovating the appearance of your apartment or condominium will help increase occupancy rates.
Possible Subsidies and Grants for Large-Scale Renovations in Shinjuku-ku, Tokyo
In Shinjuku-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 government! (As of June 2026)
Condominium Long-Term Life Promotion Tax System (Special Measures for Property Tax)
There is a system that reduces property tax when large-scale renovations are performed on condominiums.
◎ For more details, click here↓
Property tax is reduced when large-scale renovations are performed on condominiums! (PDF)
Is your condominium being regularly maintained? (PDF)
Tokyo Condominium Improvement Construction Subsidy System
The Tokyo Metropolitan Government promotes proper maintenance and management of condominiums by providing subsidies (interest subsidies) in collaboration with the Japan Housing Finance Agency for management associations that plan and carry out improvements and repairs, such as exterior wall painting of common areas, rooftop waterproofing, and barrier-free modifications.
Additionally, installation work for solar power generation equipment is also eligible for financing.
◎ For more details, click here↓
Subsidies for condominium repairs
Japan Housing Finance Agency
FY 2026 Subsidy Project: Promotion of Insulation and Renewable Energy in Rental Housing
The Tokyo Metropolitan Government is promoting a project to intensively support rental housing owners who implement insulation renovations that contribute to tenant health, soundproofing, and crime prevention, as well as supporting expenses for introducing renewable energy power by combining solar power generation and low-voltage bulk electricity procurement.
◎ For more details, click here↓
Announcement of the start of the insulation and renewable energy promotion project for rental housing
FY 2026 Rental Housing Insulation and Renewable Energy Promotion Project
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↓
Explanation video on renovation cost subsidies for special nursing homes, etc.
Examples of Costs for Large-Scale Renovations
These are examples of costs for each renovation project!
（度合いにより変動します）
（度合いにより変動します）
Resin Mortar
(Varies depending on the degree)
(Varies depending on the degree)
※Costs and warranty periods may vary depending on the shape, quantity, condition of the substrate, 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 on a Mixed-Use Building
| Construction Details |
| Partial replacement of damaged tiles Painting of ancillary 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 tile: Kunishiro Tile Painting of ancillary 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 rooftop, we proposed waterproofing for the entire exterior wall. Seven S is a clear waterproofing material for tile exterior walls, and while the cost is somewhat high, 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 Shinjuku-ku, Tokyo, and it can be confusing to decide which one 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 manage their own projects
By confirming 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 renovation achievements.
Additionally, if they provide detailed explanations of repair work with photos, it offers reassurance as a reference when you actually request repairs.
If you are concerned about whether the contractor you are about to hire will respond adequately, choose one with extensive experience in large-scale renovations.
It can also be effective to refer to reviews on Google and review sites to look 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 neighboring residents. Therefore, it is necessary to prevent issues in advance by reporting the progress of the work and sharing 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 done at no cost, providing peace of mind!
Additionally, companies that offer warranty periods are often confident in their work, which can serve as a criterion for selecting a contractor!
Warranty periods vary by contractor and type of work, but typically range from 1 to 10 years.
Emergency repairs or partial repairs 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.
At Kakeru Koumuten Co., Ltd., we send out annual direct mail as part of our after-sales maintenance, allowing for yearly inspections.
For simple repairs such as partial sealing, we provide services free of charge.
Obtain estimates from multiple contractors (at least three)
When requesting large-scale repairs, obtain estimates from multiple contractors.
It is important to get estimates from at least three companies and compare their estimates and reports!
Even for the same type of work, repair costs, warranties, and after-sales services may vary by contractor.
Additionally, obtaining multiple estimates makes it easier to negotiate prices.
To request your desired repair contractor at the lowest possible price, obtaining estimates from multiple contractors is essential.
When comparing estimates, consider not only the cost but also
“the items in the estimate”
“the methods and materials for substrate repair and exterior wall painting”
“confirmation of the process”
and make detailed comparisons for your judgment! If the quality of the auxiliary materials is low or if steps are skipped, costs can be reduced, so avoid making decisions based solely on price!
Especially regarding substrate repair work, since it is not easily visible from the outside, be sure to check whether the repair method is appropriate for the condition of the substrate!
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 change 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 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 performed while keeping costs down.
Moreover, if a contractor is outsourcing to subcontractors, 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 performs 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 Shinjuku-ku, Tokyo, please contact Kakeru Koumuten
Our company has handled many exterior wall renovations for condominiums and apartments in Shinjuku-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!
Whether you want to “make it last long with one renovation,” “keep costs down as much as possible,” or “improve insulation performance because the indoors are hot,” we will provide optimal solutions for your specific requests and future repair plans.
We perform everything from temporary scaffolding work to roofing and exterior wall painting completely in-house.
We are confident that we will not be outdone in terms of cost, quality, and organization 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 Shinjuku-ku, Tokyo
Aizumicho, Shinjuku-ku / Akagishitamachi, Shinjuku-ku / Akagimotomachi, Shinjuku-ku / Agemachi, Shinjuku-ku / Arakicho, Shinjuku-ku / Ichigaya Kagacho, Shinjuku-ku / Ichigaya Kouramachi, Shinjuku-ku / Ichigaya Sadobara-machi, Shinjuku-ku / Ichigaya Sunaichomachi, Shinjuku-ku / Ichigaya Takashomachi, Shinjuku-ku / Ichigaya Tamachi, Shinjuku-ku / Ichigaya Daimachi, Shinjuku-ku / Ichigaya Chonenji-machi, Shinjuku-ku / Ichigaya Nakanomachi, Shinjuku-ku / Ichigaya Hachimancho, Shinjuku-ku / Ichigaya Funakawaramachi, Shinjuku-ku / Ichigaya Motomuramachi, Shinjuku-ku / Ichigaya Yakuoji-machi, Shinjuku-ku / Ichigaya Yanagimachi, Shinjuku-ku / Ichigaya Yamanobori-machi, Shinjuku-ku / Iwatomachi, Shinjuku-ku / Enokimachi, Shinjuku-ku / Okubo, Shinjuku-ku / Kaidai-machi, Shinjuku-ku / Kagurakawagashi, Shinjuku-ku / Kagurazaka, Shinjuku-ku / Kasumigaokamachi, Shinjuku-ku / Katamachi, Shinjuku-ku / Kabukicho, Shinjuku-ku / Kamiochiai, Shinjuku-ku / Kawadacho, Shinjuku-ku / Kikui-machi, Shinjuku-ku / Kitashinjuku, Shinjuku-ku / Kitamachi, Shinjuku-ku / Kitayamanobori-machi, Shinjuku-ku / Saikucho, Shinjuku-ku / Samoncho, Shinjuku-ku / Shinanomachi, Shinjuku-ku / Shimoochiai, Shinjuku-ku / Shimomiyahicho, Shinjuku-ku / Shirogane-machi, Shinjuku-ku / Shinogawamachi, Shinjuku-ku / Shinjuku, Shinjuku-ku / Suidocho, Shinjuku-ku / Sugacho, Shinjuku-ku / Sumiyoshicho, Shinjuku-ku / Daikyo-machi, Shinjuku-ku / Takadanobaba, Shinjuku-ku / Tansu-machi, Shinjuku-ku / Tsukijimachi, Shinjuku-ku / Tsukudocho, Shinjuku-ku / Chikudo Hachimancho, Shinjuku-ku / Tenjincho, Shinjuku-ku / Tozuka-machi, Shinjuku-ku / Fukucho, Shinjuku-ku / Bentencho, Shinjuku-ku / Minami Enokimachi, Shinjuku-ku / Minamimachi, Shinjuku-ku / Minamimotomachi, Shinjuku-ku / Minamiyamanobori-machi, Shinjuku-ku / Yamabukicho, Shinjuku-ku / Yaraimachi, Shinjuku-ku / Yokodera-machi, Shinjuku-ku / Yochomachi, Shinjuku-ku / Yotsuya, Shinjuku-ku / Yotsuya Sakamachi, Shinjuku-ku / Yotsuya San’eimachi, Shinjuku-ku / Yotsuya Honshio-machi, Shinjuku-ku / Wakaba, Shinjuku-ku / Wakamatsucho, Shinjuku-ku / Wakamiya-machi, Shinjuku-ku / Waseda Tsurumaki-machi, Shinjuku-ku / Waseda Minamimachi, Shinjuku-ku / Waseda-machi
・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! A thorough explanation of causes and prevention measures!
・What is waterproofing work in large-scale renovations? A thorough explanation of its role, signs of deterioration, and precautions!
・Not enough funds for large-scale renovations… An explanation of how to deal with funding shortages and preparations you can do right now!
・What is the important surface repair in large-scale renovations? A thorough explanation of the reasons needed, signs of deterioration, and types of work!
・What is sealing work in large-scale renovations? An introduction to its role, methods, and tips to avoid failures!
・What is the important tile repair in large-scale renovations? We explain the signs of deterioration, types of construction, and cost estimates!
・What is the important exterior wall painting in large-scale renovations? A thorough explanation of its necessity, signs of deterioration, and cost estimates!
・For exterior renovations in Aoba-ku, Tokyo, trust Kakeru Koumuten Co., Ltd.!
・For roof renovations in Aoba-ku, Tokyo, trust Kakeru Koumuten Co., Ltd.!
・For exterior wall painting in Aoba-ku, Tokyo, trust Kakeru Koumuten Co., Ltd.!
We welcome consultations via LINE◎
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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!
