[Kodaira City, Tokyo] Vacant & Used Homes: Renovation Costs, Grants & Projects

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

I bought a used property, but I’m unsure 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 available.

For such concerns, Kakeru Koumuten Co., Ltd., serving the area of Kodaira 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 Kodaira City

Kodaira City, Tokyo, is a flat and livable town with the Seibu Line running through it, featuring the Tamagawa Josui Green Road and residential areas of apartment complexes and detached houses. It is also known as the birthplace of blueberry cultivation, making it an attractive living environment close to nature.

Detached houses and apartment complexes developed during the Showa era are now entering a period of generational change, reaching 40 to 50 years of age. This is why the option of “buying used detached houses or apartment units and renovating (renovating) them to suit one’s lifestyle” is expanding in Kodaira 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 renovating used properties. There is a growing interest in living by purchasing and renovating used houses. 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 houses often have issues with the roof, exterior walls, and plumbing, making them difficult to live in as they are. By renovating the facilities and interior, you can create a comfortable living environment. Additionally, by changing the layout and refreshing the interior, you can finish 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 houses tend to be evaluated at a low asset value as they are, but renovations can enhance their appearance and performance, thereby 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 them 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 construction, and depending on the purpose and conditions, there may also be subsidies or tax incentives available, 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 the renovation. Since used properties have had previous occupants, the internal structure and condition are often not clear until you actually see them. Choose a contractor that can carry out the work properly according to your wishes, the structure of the house, and the surrounding environment, and that 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 are deteriorating and to what extent in advance. 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 houses 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 the earthquake resistance and insulation.

Point 4 Check Subsidy Programs and Renovation Tax Reductions

To keep construction costs down, it is important to check for subsidies and renovation tax reductions. Subsidies are provided by the national and local governments, and part of the costs for earthquake retrofitting, energy-saving construction, and barrier-free renovations can be supported. There are tax reduction programs such as “housing loan tax reduction” when using a housing loan, and systems that allow for deductions on part of the costs for certain works even with personal funds. These can sometimes be used in combination, so it is essential to check in advance and use them strategically as a key to 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 to use 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 stated scope of work. Actual estimates will be provided after a site survey).

1. Roof and Exterior Walls

2. Interior (Interior Finishing)

3. Water-related Equipment

4. Equipment and Infrastructure

5. Waterproofing and 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 used. Please confirm the exact costs through a free on-site survey and estimate.

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

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

*The following information is as of September 2, 2026. The details, 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 the respective offices for the latest information before applying. Kakeru Koumuten can assist with confirming the systems and providing necessary documents, but the applicants and application methods vary by 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 these subsidies.

Tokyo Metropolitan Program

Kodaira City Programs

06Customer Voices

Exterior Renovation Case Study in Kodaira City

07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Kodaira City

There are many renovation companies that serve Kodaira City, and it can be confusing to decide which one to choose. When requesting renovations, be sure to check the following five points.

1. Experience in Renovation Work

Many renovation contractors publish their project achievements on their websites. If a contractor provides detailed explanations of the process with photos, it makes it easier to visualize the outcome after the request, giving you peace of mind. If you have concerns, choose a contractor with ample experience.

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

2. Check for Warranties and After-Sales Maintenance

When choosing a contractor, be sure to check for the presence of a warranty. If repairs are needed within the warranty period, they may be done for free. The duration varies by contractor and paint type, but generally ranges from 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer after-service separate from the warranty, 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 after-maintenance, sending out annual notification DM to ensure annual inspections are possible.
Click here for more details on Kakeru Koumuten’s warranty and after-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-services, and prices can vary significantly. Having multiple estimates makes it easier to negotiate prices.

When comparing estimates, it is important to look at not just the costs, but also the “items in the estimate,” “verification of primer materials, sealing materials, and additional paint,” and “confirmation of the process.” Lowering the rank of additional parts or skipping processes can reduce costs, so it is essential to not judge solely based on price.
Click here for detailed points on comparing estimates

4. Confirm whether they perform renovations in-house

At Kakeru Koumuten Co., Ltd., we conduct detailed hearings and investigations regarding the existing “condition,” “location,” “base materials,” “desired durability,” and “design” to propose the most suitable plan. While there is nothing inherently wrong with a system where partner companies perform the work, it is important to check whether the contracting company understands the construction details and has clear responsibilities for quality control and warranty. If they perform in-house work, 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 images for both exterior and interior can be quite challenging after construction. With simulations, you can reduce the risk of mistakes like “it looks different than I imagined.” Since it’s difficult to redo once the work is done, it’s recommended to choose a company that can provide flexible simulations.

08Reasons Why Kakeru Koumuten is Chosen for Renovations of Used Houses in Kodaira City

One reason is that “Kakeru Koumuten also serves Kodaira City,” but
“Our unique approach to renovating vacant and used properties that cannot be replicated by other companies”
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 costs. We have five bases centered around Aoba-ku, Yokohama for material storage and showrooms.

In-House Scaffolding Materials

We can construct the temporary scaffolding required for exterior renovations using our own scaffolding materials and in-house scaffolding team. By not outsourcing, this leads to cost reductions in 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, such as compressors and cleaning machines.

In-house waste separation

In exterior renovations, various types of waste such as paint, wood, and metal are generated. While many contractors dispose of them all together, our company significantly reduces waste disposal costs by separating and recycling waste.

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. You can also confirm heat insulation properties using color simulation and heat insulation paint testing equipment. The showroom is a 3-minute walk from Eda Station in Aoba-ku, Yokohama, and is accessible from Tokyo as well.

2. Complete in-house construction

A major strength of Kakeru Koumuten Co., Ltd. is our complete in-house construction. By maintaining a consistent system from inquiry to project completion, we can keep costs down while delivering high-quality renovations. A single representative handles everything from the estimate to the completion of the work, ensuring smooth communication without changes in sales or construction management. All work, from temporary scaffolding installation to exterior painting and roof renovations, is carried out by our own skilled craftsmen. 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, 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 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 access to the roof is not possible due to height, we can respond using a drone. We also use a thermal imaging camera for leak investigations. We respond according to our customers’ wishes and also accept emergency measures for sudden leaks from exterior walls.

6. Human Resource Development

We create various models to enhance skills and conduct practical training. Since the construction methods and materials used for exterior renovations differ based on 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 offer color simulations for exterior wall painting, as well as simulations for metal siding and roof overlays. We can create 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 actual color tones.

7-2. Interior Renovation Simulation

We also provide 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 can also handle solar panel and battery installation work!

As more customers are introducing solar equipment with generous subsidies in conjunction with renovations of used properties, Kakeru Koumuten Co., Ltd. also handles solar equipment installation and proposes solar panels tailored to the shape of your roof. We can also accept requests for estimates and power generation simulations only.

09Existing and Vacant Home Renovation in Kodaira City | Frequently Asked Questions

Here are answers to common questions from people considering renovation of existing or vacant homes in Kodaira City.

See Kakeru Koumuten’s construction examples
Services & Prices

10Features of Kodaira City

Kodaira City in Tokyo is a flat and livable town with the Seibu Line running through it, featuring the greenery of the Tamagawa Josui Green Road and a mix of apartment complexes and single-family homes. It is also known as the birthplace of blueberry cultivation, making it an attractive living environment close to nature.

Single-family homes and apartment complexes developed during the Showa era are now undergoing generational transitions, and the choice of continuing to live in these homes through renovation and remodeling is becoming established. Kakeru Koumuten Co., Ltd. is headquartered in Aoba-ku, Yokohama, and offers exterior and interior renovations across a wide area of Kanagawa and Tokyo. We can perform all work in-house, including exterior wall overlay methods.

Renovation Service Areas

Kakeru Koumuten Co., Ltd. accepts requests across a wide area of Kanagawa and Tokyo.

Consultations via LINE are also very welcome◎

We are regularly updating our Instagram ◎ Please follow us!