[Hamura City, Tokyo] Renovation of Vacant Houses and Used Properties | Cost Estimates, Subsidies, and Case Studies

For those considering renovations of used properties and vacant houses in Hamura 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 these concerns, Kakeru Koumuten Co., Ltd., which has numerous achievements in Hamura 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 Hamura City

Hamura City in Tokyo is known for the Tamagawa Water Intake Weir (the starting point of the Tamagawa Josui), and is a compact town in Nishi-Tama. The balance between industrial areas and residential neighborhoods, along with the natural beauty of the Tamagawa River, makes it an attractive place to live.

Houses developed during the Showa era are now entering a generation change period, reaching 40 to 50 years old. This is why the option of “buying a used house and renovating (or refurbishing) it to fit one’s lifestyle” is expanding in Hamura City.

02Reasons for Renovating Vacant Houses and Used Properties

In recent years, the Japanese housing market has expanded options not only for new builds 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 and updating the facilities and interiors, you can create a comfortable living environment. Additionally, by changing the layout and refreshing the interiors, 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 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 them into stylish rentals or share houses, you can differentiate them from other properties, and depending on the location and plan, you may also expect improved profitability. Initial costs can be lower than new construction, and depending on the use and conditions, there may be cases where subsidies or tax incentives apply, leading to an increase in those utilizing vacant houses for business.

03Precautions When Renovating Vacant Houses and Used Properties

Point 1 Choose a Reliable Construction Company

First and foremost, it is essential to select a contractor that you can trust to handle your renovation with peace of mind. 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 thoroughly in accordance with your wishes, the structure of your home, and the surrounding environment, and also provides aftercare following the construction.

Point 2 Always Check the Deterioration 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, internal damage is often not apparent without investigation. Conduct a current condition survey before starting construction to understand 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. Additionally, 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 the earthquake resistance and insulation performance.

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, supporting part of the costs for earthquake retrofitting, energy-saving construction, and barrier-free renovations. Tax deductions include the “housing loan tax deduction” when using a mortgage, and there are 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 essential to check in advance and plan to utilize them strategically for a successful renovation (for the latest information, see this subsidy section).

04 Cost 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 market rates 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 indicated 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 of rooftops and updates to plumbing and wiring throughout the 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 Hamura City

*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 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 several 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 when used in combination.

Tokyo Metropolitan Government Program

Hamura City Program

06Customer Voices

Roof Overlay Construction Examples in Hamura City

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

There are many renovation companies that serve Hamura City, and it can be confusing to decide which one to choose. When requesting renovations, be sure to check the following 5 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 what to expect 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’s important to check the content of low ratings, the company’s responses, and the timing of posts. Google reviews are particularly useful, but don’t make your decision based solely on reviews; consider project achievements, estimates, and warranty details for a comprehensive judgment.

2. Check for warranties and after-sales maintenance

When selecting 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 type, but typically ranges from 1 to 10 years (emergency repairs or 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 and send out annual notification DM, making annual inspections possible.
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 can also make 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 judge solely by the amount.
Learn more about the points to compare 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 best 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 responsibilities 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 outcome after construction can be challenging for both exterior and interior work. Having simulations can reduce the risk of the outcome being “different from what you imagined.” Once the work is done, it’s difficult to redo, so it’s recommended to choose a company that can provide flexible simulations.

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

One reason is that Kakeru Koumuten also serves Hamura City, but
our unique approach to “renovations of vacant houses and used properties” that cannot be imitated by other companies
has received high praise from many customers.

1. Equipment Specialized for In-House Renovations

Kakeru Koumuten Co., Ltd. has organized warehouses and material storage to provide high-quality renovations at low cost. We have 5 bases centered around Aoba-ku, Yokohama for material storage and showrooms.

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 have 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 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. While many contractors dispose of them all together, our company significantly reduces waste disposal costs by sorting and recycling waste materials.

Exterior Renovation Dedicated Showroom

In the showroom, you can not only have meetings but also check the actual paint colors and a wide variety 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 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. Since one representative handles everything from the estimate to project completion, there is no change in the contact person for sales and construction management, allowing for smooth communication. All work, from temporary scaffolding setup to exterior wall 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 on Staff

We have obtained licenses for the construction industry and industrial waste collection and transportation. 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 on 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 places, 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 only.

6. Human Resource Development

We create various models for skill enhancement and conduct practical training. Since exterior renovations vary in construction methods and materials depending 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!

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 can provide color simulations for exterior wall painting, as well as simulations for metal siding and roof overlays. We can create simulations based on actual photos of your building and suggest several color patterns using our recommended color schemes. We also accommodate “test painting” and “sample board arrangements” to check the actual colors.

7-2. Interior Renovation Simulation

We also support simulations and perspective drawings for interior renovations. We suggest recommended simulations based on your preferred style, such as modern designs. Realistic perspectives are created from 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 available. Kakeru Koumuten Co., Ltd. also handles solar power system installations and can recommend solar panels tailored to the shape of your roof. We can also provide estimates and create power generation simulations upon request.

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

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

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

10Features of Hamura City

Hamura City in Tokyo is known for the Tamagawa Water Intake Weir (the starting point of the Tamagawa Josui), and is a compact town in the western Tama area. It has a balanced spread of industrial and residential areas, with the charm of nature along the Tamagawa River and livability.

Houses developed during the Showa era are now undergoing generational transitions, and the choice of living on through used homes + renovations has taken root. Kakeru Koumuten is headquartered in Aoba-ku, Yokohama, and we handle exterior and interior renovations across a wide area in Kanagawa Prefecture and Tokyo. We can perform all work in-house, including wall covering methods.

Areas We Can Serve for Renovations

Kakeru Koumuten accepts requests from a wide area in Kanagawa Prefecture and Tokyo.

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