[Midori-ku, Sagamihara] Renovation of Vacant Houses and Used Properties | Costs, Subsidies, and Case Studies

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01Reasons for the Increase in Renovations of Used Properties and Vacant Houses in Midori-ku

Midori-ku in Sagamihara City is the largest ward in terms of area, located in the northwestern part of the city. From the urban area around Hashimoto Station, which is undergoing redevelopment, to the lush rural areas of Shiroyama, Tsukui, Sagamiko, and Fujino, both urban and natural environments coexist within this ward.

While urban development is progressing around Hashimoto Station with the anticipation of a new station for the Linear Chuo Shinkansen, there are areas in the Tsukui region where old houses and vacant properties can be utilized. Therefore, in Midori-ku, there is the option to purchase a used detached house and renovate (rehabilitate) it to suit your lifestyle.

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. There is growing interest in living in renovated or refurbished used homes. 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 less livable as they are. By renovating and upgrading 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 homes are often valued low in their current state, 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 others, 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, they may also qualify for subsidies or tax incentives, leading to an increase in the number of 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 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 confirm which parts are deteriorating and to what extent beforehand. Since there have been other occupants, 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 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, supporting part of the costs for earthquake retrofitting, energy-saving renovations, and barrier-free modifications. Tax deductions include the “housing loan tax deduction” when using a housing loan, and there are systems that allow for deductions on 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 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 as a guideline for your financial planning (the table below provides general estimates for single-family homes. The interior is based on one 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 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 updates to plumbing and wiring for the entire house may exceed the above estimates depending on 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 Midori Ward

*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 each office for the latest information before applying. Kakeru Koumuten can assist with confirming the systems and necessary documents, but the applicant 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.

Sagamihara City Program

View information on renovation tax deductions and other systems

• Housing Loan Tax Deduction: If you use a housing loan for renovations that meet certain requirements, income tax and other deductions will be applied based on the year-end balance.
• Renovation Promotion Tax System (Investment-type Tax Deduction): For construction such as earthquake resistance, energy saving, barrier-free, and long-term excellent housing, there may be cases where income tax deductions can be received even with personal funds.
• Reduction of Fixed Asset Tax: There is a system that reduces fixed asset tax for a certain period for earthquake-resistant renovations, energy-saving renovations, and barrier-free renovations.
• Kanagawa Prefecture’s Existing Housing Energy-Saving Renovation Subsidy: For the 2026 fiscal year, the subsidy rate is 1/3 with a maximum of 150,000 yen. The first phase has ended, but additional recruitment is planned from September 7 to September 30, 2026, only for electronic applications on a first-come, first-served basis (about 25 cases). Applications must be submitted by the applicant themselves, and construction before the grant decision is not eligible. Please check the official page of Kanagawa Prefecture.

While subsidies and tax deductions can sometimes be combined, there are restrictions on duplication for the same construction. Kakeru Koumuten will organize and propose “which systems can be used for your construction” after conducting a site survey.

06Customer Voices

Exterior Renovation Case Studies in Midori Ward

07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Midori-ku

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

1. Having extensive 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 project, 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 the posts. In particular, Google reviews can be informative, but don’t decide solely based on reviews; assess the overall picture by considering their work achievements, estimates, and warranty details.

2. Confirming the presence of warranties and aftercare services

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 generally ranges from 1 to 10 years (emergency repairs or partial repairs are often not covered). Some contractors also offer aftercare services separately, so be sure to check that as well.

Kakeru Koumuten Co., Ltd. provides warranties for exterior renovations and sealing work. We also conduct aftercare services and send out annual reminder DM, making annual inspections possible.
Click here for more details on Kakeru Koumuten’s warranties and aftercare services

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

When requesting renovations, be sure to obtain estimates from multiple contractors. Even for the same work, warranties, aftercare 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 steps can reduce costs, so it’s crucial 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 contracting company understands the construction details and clearly defines the responsibilities for quality control and guarantees. If the work is done in-house, it becomes easier to coordinate with the site, allowing for quick responses in case of any troubles.

5. Check if they offer color simulations and perspective drawings

Choosing colors and envisioning the look after construction can be challenging for both exterior and interior work. With simulations, you can reduce the risk of the outcome being “different from your image.” Since it is difficult to redo once the work is done, it is recommended to choose a company that can accommodate flexible simulations.

08Reasons why Kakeru Koumuten is chosen for renovations of used houses in Midori-ku

One reason is that “Kakeru Koumuten also serves Midori-ku,” but
there are also “initiatives in renovating vacant houses and used properties 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. is equipped with warehouses and material storage to provide high-quality renovations at low cost. We have 5 bases, including our Machida store in Tokyo, centered around Aoba-ku, Yokohama.

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. This eliminates outsourcing, leading to cost savings on scaffolding work. We possess scaffolding materials for approximately 50 detached houses.

Storage of Materials in Our Large In-House Warehouse

We store roofing materials and paints. By ordering in bulk, we can procure materials at lower prices, 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 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 range of catalogs. You can also confirm heat insulation properties using color simulations and heat-resistant paint testing equipment. The showroom is a 3-minute walk from Eda Station in Aoba-ku, Yokohama.

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 providing high-quality renovations. Since one representative handles everything from the estimate to project completion, there is no change in the person responsible 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 craftsmen. We are confident in our plans and costs, so we welcome competitive estimates.

3. Various Permits Obtained & Skilled Workers on Staff

We have obtained permits for construction work 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 the image above for more information.

5. Flexible and Prompt Response

We are equipped to handle various exterior troubles and situations. Even if we cannot access the roof at high places, we can respond using a drone. For leak investigations, we also use a thermal imaging camera. We respond according to customer requests and can also provide emergency measures for sudden leaks from exterior walls.

6. Human Resource Development

We create various models for skill enhancement and conduct practical training. Since exterior renovations vary in construction methods and materials based on existing materials and shapes, we regularly implement technical improvement education to ensure each staff member can adapt 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 based on actual photos of your building and propose several color patterns using our recommended color schemes. We also accommodate requests for “test painting” and “paint 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 based on actual floor plans.

8. Solar Panel and Storage Battery Installation Work Available!

More customers are introducing solar power systems, which have generous subsidies, in conjunction with renovations of used properties. 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 Midori-ku | Frequently Asked Questions

We answer the most frequently asked questions from those considering renovations of used properties and vacant houses in Midori-ku.

Is it better to consult before buying a used property or after purchasing it for renovation?

We recommend that you consult with us before making a purchase decision. Used properties often have deterioration that is not visible, and it is not uncommon to encounter unexpected construction costs after purchase. By having Kakeru Koumuten check the condition of the property you are considering in advance and provide an estimate for necessary renovations, you can establish a feasible financial plan.

What renovations should be prioritized for a used house in Midori-ku?

Depending on the condition of the building, we prioritize areas that, if left unattended, could lead to damage, such as leaks, termites, structural issues, and seismic safety. After that, we will determine the order of work for exteriors such as roofs and walls, water areas (kitchen, bathroom, toilet), and insulation, based on your budget and the impact on your daily life. For older homes, we recommend starting with a comprehensive inspection of the entire building, including the condition of the roof and exterior walls.

Is the situation in Midori-ku different between urban and mountainous areas? What should I be aware of when buying a used house?

Yes, in Midori-ku, the housing situation varies significantly between urban areas like Hashimoto and the mountainous regions of Tsukui, Sagamiko, and Fujino. In urban areas, inspections focus on exteriors, water areas, and seismic safety, while for old houses and vacant homes in the mountains, checking insulation, seismic safety, leaks, and termites is particularly important. In locations with significant elevation changes, checking retaining walls and drainage is also necessary. We also offer information on the Sagamihara City wooden house seismic retrofitting subsidy (1/2, up to 1.15 million yen, with additional support for elderly households) and subsidies for purchasing and renovating used homes.

How much does a full renovation (full remodeling) cost?

The cost of a full renovation for a detached house varies greatly depending on the scope and grade. If focusing on partial renovations, costs start from around 5 million yen, while large-scale renovations that include interior and exterior work, water areas, insulation, and seismic safety can exceed 10 million to 20 million yen. We will first assess the condition through an on-site survey and propose a prioritized plan that fits your budget.

Do I need to apply for subsidies myself? Is the process difficult?

The applicant varies depending on the program. For example, the national “Mirai Eco Housing 2026 Project” is a system where registered contractors (construction companies) apply. For seismic retrofitting and housing renovations under the nursing care insurance in your city, the application is generally made by the homeowner, but we will guide you through the necessary documents and process. We will organize and inform you about “which programs are available,” so please feel free to consult with us first.

What risks are there if I leave a vacant house unattended?

Risks include the progression of leaks and termite damage, depreciation of asset value due to deterioration of the exterior walls and roof, and neglect of garden trees and equipment. Additionally, if you receive a recommendation from the municipality as a “poorly managed vacant house” or “designated vacant house,” there is a possibility that the special tax exemption for residential land will be revoked. Conducting an inspection early and performing necessary work according to your plan to live in, rent, sell, or utilize the property can ultimately help reduce costs.

I am concerned about seismic safety. How can I assess the seismic safety of a used detached house?

The construction period is a significant indicator. Check if it was built after June 1981 (new seismic standards), and further, if it was built after June 2000 (strengthening regulations for joints and foundations). For wooden detached houses built before this, we recommend a seismic assessment. Your city also offers subsidies for seismic retrofitting of wooden houses, which can significantly reduce costs if eligible (for details, see the subsidy section above). Kakeru Koumuten Co., Ltd. can assist you from diagnosis to renovation.

Will I need temporary housing during construction? How long will it take?

The scope of work depends on the project. For exterior renovations and partial interior work, it is often possible to carry out the construction while you remain in your home. However, for large-scale full renovations that include water areas, we may recommend temporary housing. The estimated duration is about 2 to 4 weeks for exterior work and approximately 1 to 3 months or more for full renovations. We will provide a schedule in advance and propose a plan that minimizes the impact on your daily life.

Is Midori-ku within your service area? Will there be any travel fees?

Yes, Midori-ku is within the service area of Kakeru Koumuten. We have five locations, including our Machida branch in Tokyo, centered around Aoba-ku, Yokohama, and we cover a wide range of areas in Kanagawa and Tokyo. Estimates are completely free, and we do not engage in aggressive sales tactics. Please feel free to consult with us first.

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10Features of Midori-ku

Midori-ku in Sagamihara City is the largest ward in terms of area, located in the northwestern part of the city. It encompasses a city area undergoing redevelopment around Hashimoto Station and lush mountainous regions such as Shiroyama, Tsukui, Sagamiko, and Fujino, where urban and natural environments coexist.

It is a ward that combines the urban area around Hashimoto Station with the mountainous regions of Tsukui, Sagamiko, and Fujino. Kakeru Koumuten serves Midori-ku from five locations, including our Machida branch in Tokyo, centered around Aoba-ku, Yokohama. We are capable of in-house construction even for exterior wall overlay methods.

Areas We Can Renovate

Kakeru Koumuten accepts requests from a wide range of areas in Kanagawa and Tokyo. The availability of our services may vary depending on the type of work and location, so please contact us for more details.

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