Leave the repairs and renovations of condominiums and apartments in Sumida-ku, Tokyo to Kakeru Koumuten Co., Ltd.!
If you are looking for
large-scale repair contractors in
Sumida-ku, Tokyo, come to Kakeru Koumuten
Kakeru Koumuten is a complete in-house construction company 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 Sumida-ku, Tokyo.
“Subsidies and costs available for large-scale repairs in Sumida-ku”
“How to choose a large-scale repair contractor in Sumida-ku”
“Reasons why Kakeru Koumuten is chosen in Sumida-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 large-scale repairs is
“multiple estimates”!
Let’s get at least three estimates from large-scale repair companies
serving Sumida-ku!
Reasons why Kakeru Koumuten is chosen for large-scale repairs in Sumida-ku, Tokyo
One reason why we are entrusted with large-scale repairs in Sumida-ku
is that “Kakeru Koumuten is based in Tokyo,” but
“Our unique approach to large-scale repair work that cannot be imitated by other companies”
has also received high praise from many customers.
“costs,” “quality,” and “plans” for exterior renovations of apartments, condominiums, and commercial facilities in Sumida-ku, Tokyo,
1. Equipment specialized for exterior renovations
At Kakeru Koumuten Co., Ltd., 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 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, enabling 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 them all together, by sorting and recycling waste materials, significant cost reductions on 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 in-house management and construction.
From inquiries 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 will be in charge, whether it’s sales or construction management, smooth communication is ensured.
We can handle everything from temporary scaffolding installation to exterior wall painting, substrate repair, waterproofing work, and tile repairs with complete in-house construction!
Qualified professionals with specialized knowledge and experience will conduct inspections and actual construction for each process!
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 technicians, 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 inspectors 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 cannot be checked from high places by utilizing drones!
During leak investigations, we can use a thermal imaging camera, which helps in identifying the cause of leaks!
We will respond according to your wishes.
We also accept emergency measures for sudden leaks!
In emergencies or urgent requests, we will respond promptly!
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 education to ensure each staff member can respond appropriately.
We also educate on points to be careful about and areas to check at each stage of large-scale repair work.
7. Consideration for Residents and Neighbors
During large-scale repair work, we not only notify residents and visit neighbors to explain the work, but we also install bulletin boards at entrances to display the work schedule and announcements!
Additionally, we ensure that the manners of all entrants are thoroughly educated to minimize any inconvenience to residents and neighbors.
8. Strict Quality Control
Each stage of work 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 overlooked.
When performing exterior wall painting or waterproofing work, we confirm the number of used paint cans to ensure 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 we create can be done using actual photos of your apartment or building!
You can also perform simulations on your smartphone or computer.
By doing a simulation and then opting for two-tone colors or a change in image, 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 conduct test painting on your exterior walls.
By performing 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 or roof replacement work is also possible
With exterior renovation simulations, you can significantly reduce the risk of failure in changing your image!
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 Sumida-ku, Tokyo
In Sumida-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 Longevity 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 is reduced when large-scale repairs are made to condominiums! (PDF)
Is your condominium being regularly repaired? (PDF)
Tokyo Condominium Improvement Construction Subsidy System
In Tokyo, to promote the proper maintenance and management of condominium buildings, subsidies (interest support) are provided 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 renovations.
Additionally, installation work for solar power generation systems is also eligible for financing.
◎ For more details, click here↓
Subsidies for Repairs of Condominiums
Japan Housing Finance Agency
FY 2028 Subsidy Project for Insulation and Renewable Energy Promotion in Rental Housing
Tokyo 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 supporting expenses for introducing renewable energy power by combining solar power generation and low-voltage bulk electricity reception.
◎ For more details, click here↓
Announcement of the Start of the Insulation and Renewable Energy Promotion Project for Rental Housing
FY 2028 Insulation and Renewable Energy Promotion Project for Rental Housing
FY 2028 Renovation Cost Subsidy System [Special Nursing Homes, etc.]
Tokyo provides support for renovations of facilities for the elderly.
◎ For more details, click here↓
Explanation Video on Renovation Cost Subsidies for Special Nursing Homes, etc.
[Sumida-ku] Subsidy System for Loan Guarantee Fees for Condominium Renovation
In Sumida-ku, when a condominium within the ward undertakes repair work on common areas and entrusts the (Public Interest Incorporated Foundation) Condominium Management Center with debt guarantees to borrow necessary funds from the (Independent Administrative Institution) Housing Finance Agency, there is a system in place to subsidize the guarantee fees incurred for the entrustment.
◎ For more details, click here↓
About the Subsidy System for Debt Guarantee Fees for Condominium Renovation Loans
Information on the Subsidy System for Debt Guarantee Fees for Condominium Renovation Loans (PDF)
[Sumida-ku] Condominium Planned Repair Survey Support System
In Sumida-ku, there is a system to subsidize the costs of surveys related to buildings and facilities to promote planned repairs of condominiums. To carry out timely and appropriate repairs, it is essential to regularly investigate the deterioration status of the building and review the long-term repair plan. We encourage you to take advantage of this system.
◎ For more details, click here↓
About the Condominium Planned Repair Survey Support System
Information on the Condominium Planned Repair Survey Support System (PDF)
[Sumida-ku] Condominium Renovation Loan Repayment Subsidy
In Sumida-ku, there is a system aimed at improving the living performance of condominiums and contributing to the formation of a good living environment by subsidizing a portion of the repayment of loans received from the Independent Administrative Institution Housing Finance Agency for repair work on common areas of condominiums located within the ward, carried out by management associations, etc.
◎ For more details, click here↓
About the Condominium Renovation Loan Repayment Subsidy
[Brochure] Sumida-ku Condominium Renovation Loan Repayment Subsidy System (PDF)
Examples of Costs for Large-Scale Repairs
These are examples of costs for each repair work!
（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 Feedback
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 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 Sumida-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 showcasing their exterior renovation project 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 properly, 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 requesting their services.
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 sharing information about laundry, etc., on bulletin boards.
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-service availability
When choosing a large-scale repair company, make sure to check for warranties.
If any issues such as leaks occur after the construction, 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 demonstrate confidence in their work, which can serve as a criterion for selecting a contractor!
Warranty periods vary by contractor and type of work, but typically range from 1 to 10 years.
Emergency repairs or partial fixes often do not come with a leak warranty.
Moreover, some contractors offer after-service in addition to warranties, so be sure to check if the contractor you are considering has warranties and after-service.
At Kakeru Koumuten Co., Ltd., we send out annual direct mail for after-service, allowing for yearly inspections.
We provide free support for simple repairs such as partial sealing.
Obtain estimates from multiple contractors (at least 3 companies)
When requesting large-scale repairs, obtain estimates from multiple contractors.
It is important to obtain estimates from at least three companies and compare their estimates and reports!
Even for the same type of work, repair costs and warranties or after-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
“the items in the estimate”
“the methods and materials for substrate repair and exterior wall painting”
“confirmation of the process”
and make detailed comparisons! If the quality of auxiliary materials is low or if processes are skipped, costs can be reduced, so avoid making decisions based solely on price!
Especially regarding substrate 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 substrate!
Confirm whether it is managed in-house
Large-scale renovation work includes various types of construction such as “substrate repair work,” “exterior wall painting,” “waterproofing work,” and “pipe replacement!”
The content of the plan 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 also result in additional time and costs as you will need to investigate and then request subcontractors.
By having knowledge and experience and managing in-house, responsible construction can be carried out while keeping costs down.
Moreover, one of the disadvantages of contractors that outsource is that if any trouble occurs during construction, their response may be delayed.
It is prudent to avoid having a company that has not actually met with the customer manage the construction.
Kakeru Koumuten Co., Ltd. conducts 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 Sumida-ku, Tokyo, please contact Kakeru Koumuten
Our company has handled many exterior wall renovations for condominiums and apartments in Sumida-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 be able to provide emergency measures, so please feel free to consult with us!
“I want it to last a long time 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 completely in-house.
We are confident that we will not be outdone in terms of cost, quality, and organization compared to other companies for exterior work!
We welcome competitive estimates as we are confident in our services!
Kakeru Koumuten Co., Ltd. accepts requests throughout Kanagawa Prefecture and all of Tokyo.
List of areas in Sumida-ku, Tokyo
Azumabashi, Sumida-ku / Ishihara, Sumida-ku / Oshiage, Sumida-ku / Kamezawa, Sumida-ku / Kikukawa, Sumida-ku / Kyoshima, Sumida-ku / Kinshi, Sumida-ku / Koto-bashi, Sumida-ku / Sumida, Sumida-ku / Taihei, Sumida-ku / Tachibana, Sumida-ku / Tachikawa, Sumida-ku / Chitose, Sumida-ku / Tsutsumi-dori, Sumida-ku / Narihira, Sumida-ku / Higashi-Komagata, Sumida-ku / Higashi-Sumida, Sumida-ku / Higashi-Mukojima, Sumida-ku / Bunka, Sumida-ku / Honjo, Sumida-ku / Midori, Sumida-ku / Mukojima, Sumida-ku / Yahiro, Sumida-ku / Yokoami, Sumida-ku / Yokokawa, Sumida-ku / Ryogoku, Sumida-ku
・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!
・Insufficient 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 its necessity, 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 mistakes!
・What is the important tile repair in large-scale renovations? An explanation of signs of deterioration, types of work, and cost averages!
・What is the important exterior wall painting in large-scale renovations? A thorough explanation of its necessity, signs of deterioration, and cost averages!
・For exterior renovations in Sumida-ku, Tokyo, trust Kakeru Koumuten!
・For roof renovations in Sumida-ku, Tokyo, trust Kakeru Koumuten!
・Leave your exterior wall painting in Sumida-ku, Tokyo to Kakeru Koumuten Co., Ltd.!
Consultations via LINE are also very welcome◎
We are also updating our Instagram regularly◎ Please follow us◎
株式会社翔工務店へ
株式会社翔工務店は平均年齢２０代後半の若い会社ですが、技術はどこにも負けていません。
いちばんの強みは、足場工事、屋根工事、塗装工事とすべて自社で行えること。一般には分業されるこの業界にあって、一式で頼めるので管理に手間がかからず、コストも抑えることが出来ます。何より、トラブルがあればすぐにかけつけます！
自信をもって、宣言できます。私たちは、神奈川で一番若くて親切なリフォーム屋です！
