[Tokyo, Nishitama-gun] Vacant House and Used Property Renovation | Costs, Subsidies, and Case Studies

For those considering renovations of used properties and vacant houses in Nishitama District

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 Nishitama-gun, will clearly explain the key points for a successful renovation.

Get estimates from at least 3 companies!

01Reasons for the Increase in Renovation of Used Properties and Vacant Houses in Nishitama-gun

Nishitama-gun in Tokyo is a mountainous area rich in nature, consisting of four towns and villages: Mizuho Town, Hinode Town, Hinohara Village, and Okutama Town. Surrounded by clear streams, satoyama, and forests, it is becoming increasingly popular as a place to relocate for a natural lifestyle close to the city center or for dual residence.

There are many old wooden houses, vacant houses, and traditional houses, and it is now a time when reviewing seismic resistance and insulation, as well as revitalizing vacant houses, is necessary. For this reason, the option of “buying used single-family homes, traditional houses, or vacant houses and renovating (renovating) them to fit a lifestyle in nature” is expanding in Nishitama-gun.

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 used properties through renovations. There is a growing interest in living in renovated and refurbished 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.” Old houses often have issues with roofs, 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 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 are often valued low as they are, but renovations can improve 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 into stylish rentals or share houses, you can differentiate 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 purpose and conditions, there may also be subsidies or tax incentives, leading to an increase in people 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 actually see them. Choose a contractor who can carry out the work properly 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 confirm which parts have deteriorated and to what extent beforehand. Since the property has been lived in by someone else, many internal damages are often not apparent without investigation. Conduct a current condition survey before starting construction to identify any hidden deterioration.

Point 3 Review Earthquake Resistance and Insulation Performance

In the renovation of used and vacant houses, it is particularly important to review 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 construction 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 part of the costs for earthquake retrofitting, energy-saving construction, and barrier-free renovations may be supported. Tax deductions include the “housing loan tax deduction” when using a housing loan, as well as systems that allow for partial deductions of costs for certain works 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 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 familiarize yourself with the approximate costs by area to serve as a guideline for your financial planning (the table below provides general estimates for typical single-family homes. The interior is based on a single 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 of rooftops and updating plumbing and wiring for the entire house may exceed the above estimates based on area and method. Please confirm the exact costs through a free on-site survey and estimate.

For more details, please check the construction menu and price list!

05[Latest 2026] Subsidies and Grants Available in Nishitama-gun

*The following information is as of September 3, 2026. The content, duration, and budget of the systems change annually, and many will end once the budget limit is reached. Please check for the latest information with our company or the respective offices 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 Efficiency 2026 Campaign

The government is implementing multiple subsidy projects targeting energy-efficient renovations under the “Housing Energy Efficiency 2026 Campaign.” Construction related to insulation, windows, and water heaters may be eligible for these subsidies.

Tokyo Metropolitan Program

Programs in Nishitama-gun (Mizuho Town, Hinode Town, Hinokigahara Village, Okutama Town)

06Customer Feedback

Exterior Renovation Case Studies in Nishitama-gun

07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Nishitama-gun

There are many renovation companies that serve Nishitama-gun, 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 work 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 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. In particular, Google reviews can be informative, but do not make your decision based solely on reviews; consider the work achievements, estimates, and warranty details comprehensively.

2. Check for warranties and after-sales maintenance

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

Kakeru Koumuten Co., Ltd. provides warranties for exterior renovations and sealing work. We also conduct after-sales maintenance, sending out annual notification DM for annual inspections.
Click here for more details on Kakeru Koumuten’s warranties and after-sales 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 scope of work, warranties, after-sales services, and prices can vary significantly. Having multiple estimates makes price negotiations easier.

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

4. Confirm whether the company performs renovations in-house

Kakeru Koumuten Co., Ltd. conducts 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 contracted company understands the construction details and has clear responsibility for quality control and guarantees. If the work is done in-house, it becomes easier to coordinate with the site and respond quickly in case of any troubles.

5. Check if they offer color simulations and perspective drawings

Choosing colors and envisioning the appearance after construction can be challenging for both exterior and interior work. Having a simulation 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 Nishitama-gun

One reason is that “Kakeru Koumuten also serves Nishitama-gun,” but
we have initiatives in “vacant house and used property renovations that cannot be imitated by other companies”
which have received high praise from many customers.

1. Equipment Specialized for In-House Renovations

Kakeru Koumuten Co., Ltd. has organized warehouses and material storage areas to provide high-quality renovations at low cost. We have 5 bases located in Kanagawa Prefecture and Tokyo, including Aoba-ku, Yokohama and Machida City, Tokyo.

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, we achieve cost savings on scaffolding construction. We own scaffolding materials for approximately 50 single-family homes.

Storage of Materials in Our Large Warehouse

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

In-House Waste Separation

In exterior renovations, various waste materials such as paint, wood, and metal are generated. Our company is committed to sorting and recycling waste materials to reduce waste disposal costs.

Showroom Dedicated to Exterior Renovations

In our showroom, you can not only hold meetings but also check actual paint colors and a wide range of catalogs. You can also confirm heat resistance using color simulation and heat-resistant 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. In-house Construction Focused on Exterior Work

A major strength of Kakeru Koumuten is our in-house construction focused on exterior work. By maintaining a consistent system from inquiry to project completion, we can provide high-quality renovations at reduced costs. A single representative handles everything from the estimate to project completion, ensuring smooth communication without changes in sales or construction management. From the installation of temporary scaffolding to exterior wall painting and roof renovations, our skilled craftsmen carry out the work. We are confident in our plans and costs, so we welcome competitive estimates.

3. Various Permits Obtained & Skilled Workers on Staff

We have obtained licenses 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 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.

6. Human Resource Development

To improve skills, we create various models and conduct practical training. Since the construction methods and materials used differ based on the existing materials and shapes for exterior renovations, we conduct regular skill enhancement 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!

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

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 color patterns based on our recommendations. We also accommodate requests for “test painting” and “paint board arrangements” to confirm 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 based on actual floor plans.

8. Solar Panel and Storage Battery Installation Work Available!

As part of renovations for used properties, more customers are introducing solar power systems, which have generous subsidies. Kakeru Koumuten Co., Ltd. also handles solar power installation work 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 Nishitama District | Frequently Asked Questions

We answer some of the most frequently asked questions from those considering renovations for used properties and vacant houses in Nishitama District.

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

10Features of Nishitama-gun

Nishitama-gun in Tokyo is a nature-rich area consisting of four towns and villages: Mizuho Town, Hinode Town, Hinohara Village, and Okutama Town. Surrounded by clear streams, satoyama, and forests, it is becoming increasingly popular as a place for natural living and dual residence close to the city center.

There are many old wooden houses, vacant homes, and traditional houses, leading to a growing demand for seismic and insulation improvements, as well as the renovation and revitalization of vacant homes. Kakeru Koumuten is headquartered in Aoba-ku, Yokohama, and offers a wide range of exterior and interior renovations throughout Kanagawa and Tokyo. We can handle exterior work such as temporary scaffolding, roofing, and painting with in-house construction.

Areas We Can Renovate

Kakeru Koumuten accepts requests throughout Kanagawa and Tokyo.

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