[Tokyo, Komae City] Renovation of Vacant Houses and Used Properties | Costs, Subsidies, and Case Studies

Our Services

At Kakeru Koumuten Co., Ltd., we specialize in a variety of exterior services to enhance and protect your home. Our offerings include:

Roof Overlay (Cover Method)

Our roof overlay method is designed to provide a durable and effective solution for your roofing needs. This technique allows us to install a new roof over your existing one, saving time and reducing waste.

Rain Gutter Installation

Proper rain gutter installation is crucial for protecting your home from water damage. We ensure that your rain gutters are installed correctly to direct water away from your foundation.

Exterior Painting

Give your home a fresh look with our professional exterior painting services. We use high-quality paints that withstand the elements and enhance your home’s curb appeal.

Contact us today to learn more about our services and how we can help you maintain your home.

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Welcome to Kakeru Koumuten Co., Ltd., your trusted partner for roofing, rain gutters, and exterior painting services.

We specialize in providing high-quality construction services tailored to meet your needs.

Our team of experts is dedicated to ensuring your home is protected and looks its best.

Contact us today for a consultation!

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For those considering renovations of used properties and vacant houses in Komae City

I bought a used property, but I’m not sure if the renovation estimate I received is reasonable

This is my first full renovation, and I’m worried about making mistakes

I want to make the most of subsidies and grants

For such concerns, Kakeru Koumuten Co., Ltd., which has numerous achievements in Komae City, will clearly explain the key points for a successful renovation.

Obtain estimates from at least 3 companies!

01Reasons for the Increase in Renovations of Used Properties and Vacant Houses in Komae City

Komae City, Tokyo, faces the Tamagawa River and is a compact and livable residential city served by the Odakyu Line. Adjacent to Setagaya Ward and Kawasaki City, it boasts excellent access to the city center and the natural beauty along the riverside, resulting in a densely populated residential area despite its small size.

Houses developed during the Showa era are now entering a period of generational change, reaching 40 to 50 years old. This is why the option of “buying used houses or apartments and renovating (rehabilitating) them to suit one’s lifestyle” is expanding in Komae City.

02Reasons for Renovating Vacant Houses and Used Properties

In recent years, the Japanese housing market has expanded options not only for new constructions but also for utilizing renovated used properties. Interest in purchasing used homes for renovation and revitalization has been growing. Here, we explain the typical reasons for renovating vacant houses and used properties.

Reason 1 To Live Comfortably as Your Own Home

The most common reason for purchasing and renovating a used property is “to live comfortably.” Older homes often have issues with the roof, exterior walls, and plumbing, making them difficult to live in as they are. By renovating and updating the facilities and interiors, you can create a comfortable living environment. Additionally, by changing the layout and refreshing the interior, you can achieve a home that suits your family’s lifestyle while keeping costs lower than new construction.

Reason 2 To Increase Asset Value for Sale

More people are purchasing and renovating used properties with the intention of selling them. Used homes are often valued low as they are, but renovations can enhance their appearance and performance, increasing their value as properties.

Reason 3 To Utilize as Investment or Business

For purchases made for investment or business purposes, renovations are essential. By transforming properties into stylish rentals or share houses, you can differentiate them from other properties, and depending on the location and planning, you can also expect improved profitability. Initial costs can be lower than new constructions, and depending on the use and conditions, there may be opportunities for subsidies and tax incentives, leading to an increase in those utilizing vacant houses for business.

03Points to Consider When Renovating Vacant Houses and Used Properties

Point 1 Choose a Reliable Construction Company

First and foremost, it is essential to select a contractor you can trust to handle your renovation. Since used properties have had previous occupants, the internal structure and condition are often not clear until you see them in person. Choose a contractor who can carry out the work thoroughly according to your wishes, the structure of the house, and the surrounding environment, and who also provides aftercare following the construction.

Point 2 Always Check the Condition of the Building

For used properties and vacant houses, it is crucial to check which parts have deteriorated and to what extent beforehand. Since the property has been lived in by someone else, internal damage is often not apparent without investigation. Conduct a current condition survey before starting work to identify any hidden deterioration.

Point 3 Review Earthquake Resistance and Insulation Performance

Particularly important in the renovation of used and vacant houses is the review of earthquake resistance and insulation. The earthquake resistance standards were significantly revised in 1981, and homes built before that may not meet current standards. Furthermore, in 2000, regulations regarding joints and foundations were strengthened, making older buildings more likely to lack earthquake resistance. Check the condition of the building before starting work and be sure to check earthquake resistance and insulation.

Point 4 Check Subsidy Programs and Renovation Tax Deductions

To keep construction costs down, it is important to check for subsidies and renovation tax deductions. Subsidies are provided by the national and local governments and can support part of the costs for earthquake renovations, energy-saving construction, and barrier-free renovations. Tax deductions include the “housing loan tax deduction” when using a housing loan, as well as systems that allow for deductions on certain costs even with personal funds. These can sometimes be used in combination, so it is crucial to check in advance and plan to utilize them strategically for a successful renovation (for the latest information, see this subsidy section).

04Cost Estimates for Renovating Vacant Houses and Used Properties

The renovation costs for used properties and vacant houses vary significantly depending on the extent of damage and the scope of work. First, please understand the approximate costs by area as a guideline for your financial planning (the table below provides general estimates for single-family homes. The interior is based on a room of about 6 tatami mats, and the exterior is based on the indicated scope of work. Actual estimates will be provided after a site survey).

1. Roof and Exterior Walls

2. Interior (Interior Finishing)

3. Water Facilities

4. Equipment & Infrastructure

5. Waterproofing & Earthquake Resistance

6. Exterior Works

*The above are general estimates. Costs may vary depending on the presence of scaffolding, the condition, grade, and area of the building. Waterproofing for rooftops and updates to plumbing and wiring for the entire house may exceed the above estimates depending on the area and method. Please confirm the exact costs through a free on-site survey and estimate.

Please see the construction menu and price list for more details!

05[Latest 2026] Subsidies and Grants Available in Komae City

*The following information is as of September 2, 2026. The content, duration, and budget of the systems change each fiscal year, and many will end once the budget limit is reached. Please check with our company or each contact point for the latest information before applying. Kakeru Koumuten can assist with confirming the systems and providing necessary documents, but the applicant and application method may vary depending on the system.

National Program: Housing Energy Saving 2026 Campaign

The government is implementing multiple subsidy projects targeting energy-saving renovations under the “Housing Energy Saving 2026 Campaign.” Construction for insulation, windows, and water heaters may be eligible for combined use of these subsidies.

Tokyo Metropolitan Program

Komae City Programs

06Customer Voices

Exterior Renovation Case Studies in Komae City

07How to Choose a Remodeling Contractor for Used Properties and Vacant Houses in Komae City

There are many remodeling companies that serve Komae City, and it can be confusing to decide which one to choose. When requesting a remodel, be sure to check the following 5 points.

1. Experience in Remodeling Work

Many remodeling contractors publish their construction achievements on their websites. If a contractor provides detailed explanations of the process with photos, it can help you visualize the outcome after the request, giving you peace of mind. If you’re unsure, choose a contractor with extensive experience.

Google and review sites can also be helpful. It’s important to check the content of low ratings, the company’s responses, and the timing of posts. While Google reviews are particularly useful, don’t make your decision based solely on reviews; consider construction achievements, estimates, and warranty details for a comprehensive judgment.

2. Check for Warranties and After-Sales Maintenance

When choosing a contractor, be sure to check for warranties. If repairs are needed within the warranty period, they may be done for free. The duration varies by contractor and paint, but typically ranges from 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer after-sales services in addition to warranties, so be sure to check that as well.

Kakeru Koumuten Co., Ltd. provides a warranty for all exterior renovations and sealing work. We also conduct aftercare maintenance and send out annual notification DM, making annual inspections possible.
Click here for more details on Kakeru Koumuten’s warranty and aftercare maintenance

3. Obtain estimates from multiple contractors (at least 3 companies)

When requesting renovations, be sure to obtain estimates from multiple contractors. Even for the same construction work, warranties, after-sales services, and prices can vary significantly. Having multiple estimates makes it easier to negotiate prices.

When comparing estimates, it is important to look closely at not just the costs but also the “items in the estimate,” “verification of undercoating materials, sealing materials, and paint for auxiliary parts,” and “confirmation of the process.” Lowering the rank of auxiliary parts or skipping processes can reduce costs, so it is essential to not judge solely based on price.
Learn more about points to compare estimates

4. Confirm if the company conducts renovations in-house

At Kakeru Koumuten, we conduct detailed hearings and investigations regarding the existing “condition,” “location,” “base materials,” “desired durability,” and “design” to propose the optimal plan. While there is nothing inherently wrong with a system where partner companies perform the work, it is important to confirm whether the contracting company understands the construction details and clearly defines the responsibilities for quality control and warranty. If the work is done in-house, it is easier to coordinate with the site, making it quicker to respond in case of any issues.

5. Check if they offer color simulations and perspective drawings

Choosing colors and visualizing the image after construction can be challenging for both exterior and interior work. Having simulations can reduce the risk of mistakes like “it turned out differently than I imagined.” Since it is difficult to redo once the work is done, it is advisable to choose a company that can provide flexible simulations.

08Reasons why Kakeru Koumuten is chosen for renovations of used houses in Komae City

One reason is that Kakeru Koumuten Co., Ltd. serves Komae City,
and our unique approach to “renovating vacant houses and used properties”
has received high praise from many customers.

1. Equipment Specialized for In-House Renovations

At Kakeru Koumuten, we have organized warehouses and material storage to provide high-quality renovations at low cost. We have 5 bases in Kanagawa and Tokyo, including Aoba-ku, Yokohama, and Machida City, Tokyo.

In-House Scaffolding Materials

We can construct temporary scaffolding, which is essential for exterior renovations, using our own scaffolding materials and in-house scaffolding team. By not outsourcing, we can achieve cost reductions on scaffolding work. We own scaffolding materials for approximately 50 houses.

Storage of Materials in Our Large Warehouse

We store roofing materials and paints. By placing large orders at once, we can procure materials at a lower cost, and since we always have stock available, we can respond quickly in emergencies. We are also equipped with various tools to handle different types of construction, including compressors and cleaning machines.

In-house waste separation

In exterior renovations, various types of waste such as paint, wood, and metal are generated. Our company strives to properly separate waste and recycle materials that can be repurposed, thereby reducing environmental impact and disposal costs.

Exterior renovation dedicated showroom

In the showroom, you can not only have meetings but also check the actual paint colors and a wide range of catalogs. Color simulations and tests for heat-reflective paints can also be conducted. The showroom is a 3-minute walk from Eda Station in Aoba-ku, Yokohama, and is accessible from Tokyo as well.

2. In-house construction system for exterior work

Kakeru Koumuten Co., Ltd.’s strength lies in its in-house construction system focused on exterior work such as roofs and walls. From inquiries to project completion, we manage everything consistently, with a single representative handling everything from estimates to completion. We can easily coordinate temporary scaffolding, exterior wall painting, and roof renovations, and if interior or equipment work is included, we will establish a system tailored to the project requirements. We are confident in our plans and costs, so we welcome competitive estimates.

3. Various Permits and Skilled Workers

We have obtained permits for the construction industry and for the collection and transportation of industrial waste. We also have nationally certified sheet metal workers and painting specialists on staff, ensuring confidence in our construction techniques. We are capable of handling large-scale painting projects for factories and apartment complexes.

4. Warranty and Aftercare

Exterior wall painting and joint sealing work come with a warranty. Aftercare is available annually, and we send out notification DM each year. If you have concerns about the warranty, please click the image above for more information.

5. Flexible and Prompt Response

We are equipped to handle various exterior troubles and situations. If you cannot access the roof at high altitudes, we can respond using a drone. For leak investigations, we also use a thermal imaging camera. We respond according to our customers’ wishes and can also provide emergency measures for sudden leaks.

6. Human Resource Development

We create various models to improve our skills and conduct practical training. Since the construction methods and materials used for exterior renovations differ based on the existing materials and shapes, we conduct regular technical training to ensure that each staff member can respond to various sites.
Click here for company information

7. Flexible simulations for both exterior and interior renovations!

Kakeru Koumuten Co., Ltd. is dedicated to helping our customers choose colors and designs for their important building renovations, both exterior and interior, to ensure their satisfaction.

7-1. Exterior Renovation Simulation

We can create color simulations for exterior wall painting, as well as simulations for metal siding and roof overlays. We can generate simulations from actual photos of your building and propose several patterns with our recommended color schemes. We also accommodate “test painting” and “sample board arrangements” to confirm the actual color tones.

7-2. Interior Renovation Simulation

We also support simulations and perspective drawings for interior renovations. Based on your preferred style, such as modern, we can suggest recommended simulations. We create realistic perspectives from actual floor plans.

8. We also handle solar panel and battery installation work!

As part of renovations for used properties, more customers are introducing solar power systems, which have substantial subsidies available. Kakeru Koumuten Co., Ltd. also handles solar power system installations and can propose solar panels tailored to the shape of your roof. We can also accept requests for estimates and power generation simulations only.

09Renovation of Used Properties and Vacant Houses in Komae City | Frequently Asked Questions

We answer the most frequently asked questions from those considering renovations for used properties and vacant houses in Komae City.

See Kakeru Koumuten’s project examples
View our service menu and price list

10Features of Komae City

Komae City, Tokyo, faces the Tamagawa River and is a compact and livable residential city served by the Odakyu Line. Adjacent to Setagaya-ku and Kawasaki City, it boasts excellent access to the city center and the natural beauty along the riverside, with a high population density in its small area.

Houses developed during the Showa era are now reaching a generational transition, and the choice of buying used homes and renovating them is becoming established. Kakeru Koumuten Co., Ltd. has five bases in Kanagawa Prefecture and Tokyo, offering a wide range of exterior and interior renovations. We handle exterior work such as roofs and walls with a in-house construction system.

Areas where we can provide renovation services

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

Consultations via LINE are also very welcome◎

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