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

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Welcome to Kakeru Koumuten Co., Ltd.

Are you worried about your roof or exterior painting? We are here to help!

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01Reasons for the Increase in Renovation of Used Properties and Vacant Houses in Minamiashigara City

Minamiashigara City is a nature-rich town known for the Kintaro legend and Daiyuuzan Saijouji Temple. With the Daiyuuzan Line running through it, and its proximity to Hakone and Odawara, it boasts a residential area that combines greenery and livability.

Residential areas developed during the Showa era are now entering a generational transition period, reaching 40 to 50 years of age. This is why the option of “buying a used house and renovating it to fit one’s lifestyle” is expanding in Minamiashigara 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 in renovated 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 less livable 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 evaluated at a low asset value as they are, but renovations can improve their appearance and performance, enhancing their value as properties.

Reason 3 To Utilize as Investment or Business

When purchasing 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 constructions, and depending on the use and conditions, there may also be subsidies or tax incentives available, 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 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 according to your wishes, the structure of the house, 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 work 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 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 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, and there are systems that allow for deductions on certain costs 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).

04Cost Estimates for Renovating Vacant Houses and Used Properties

The renovation costs for used properties and vacant houses vary significantly depending on the degree 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 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 for rooftops and updating 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.

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

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

*The following information is as of September 4, 2026. The contents, periods, and budgets 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 application methods and applicants may differ 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 these subsidies when used in combination.

Minamiashigara City Program

View information on renovation tax reductions and other systems

• Housing Loan Tax Reduction: If you use a housing loan for renovations that meet certain requirements, income tax and other deductions will be based on the year-end balance.
• Renovation Promotion Tax System (Investment-type Tax Reduction): For construction related to seismic retrofitting, energy conservation, barrier-free design, 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 seismic retrofitting, energy conservation retrofitting, and barrier-free retrofitting.
• Kanagawa Prefecture Existing Housing Energy Conservation Renovation Subsidy: For the fiscal year 2026, the subsidy rate is 1/3, with a maximum of 150,000 yen. The first phase has ended, but additional applications are planned from September 7 to September 30, 2026, available only through electronic application on a first-come, first-served basis (approximately 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 reductions can sometimes be combined, there are restrictions on duplication for the same construction. “Which system can be used for my construction” will be organized and proposed by Kakeru Koumuten after a site survey.

06Customer Feedback

Exterior Renovation Case Studies in Minamiashigara City

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

There are many renovation companies that serve Aoba-ku, and it can be confusing to decide which one to choose. When requesting renovations, check the following 5 points.

1. Experience in Renovation Work

Many remodeling contractors publish their construction results 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, which brings peace of mind. For those who are uncertain, it is advisable to 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 are useful, but do not make a decision based solely on reviews; assess the overall situation by considering construction results, estimates, and warranty details.

2. Confirm 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 typically ranges from 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer aftercare services separate from warranties, so be sure to check for those 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. Obtain estimates from multiple contractors (at least 3)

When requesting remodeling, be sure to obtain estimates from multiple contractors. Even for the same construction content, warranties, aftercare services, and prices can vary significantly. Having multiple estimates makes price negotiations easier.

When comparing estimates, it is important to look at not just the costs, 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 is essential to not judge solely based on price.
Click here for detailed points on comparing estimates

4. Confirm whether the contractor performs the remodeling in-house

At Kakeru Koumuten Co., Ltd., we conduct detailed hearings and surveys regarding the existing “condition,” “location,” “materials,” “desired durability,” and “design” to propose the optimal plan. While there is nothing inherently wrong with the system where partner companies carry out the construction, it is essential to confirm whether the contracted company understands the construction details and clearly defines the responsibilities for quality control and guarantees. If we handle the construction ourselves, it becomes easier to coordinate with the site, allowing for quick responses in case of any troubles.

5. Do they support color simulations and perspective drawings?

Whether for exterior or interior, deciding on the image and colors after construction can be challenging. With simulations, you can reduce the risk of mistakes like “it turned out differently than I imagined.” Since it is difficult to redo once construction is done, it is recommended to choose a company that can provide flexible simulations.

08Reasons why Kakeru Koumuten is chosen for remodeling used houses in Minamiashigara City

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

1. Equipment specialized for in-house remodeling

At Kakeru Koumuten, we have set up warehouses and material storage to provide remodeling work at low cost and high quality. We have five bases for material storage and showrooms located within Yokohama City.

In-house scaffolding materials

For exterior renovations, we can construct temporary scaffolding using our own scaffolding materials and in-house scaffolding team. By not outsourcing, this leads to cost savings on scaffolding work. We own scaffolding materials sufficient for approximately 50 houses.

Materials stored 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 are also equipped with various tools that can 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. While many contractors dispose of them together, our company separates and recycles waste, significantly cutting down on waste disposal costs.

Showroom dedicated to exterior renovations

In our 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 resistance using color simulation 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 Co., Ltd. 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. A single representative handles everything from the estimate to project completion, ensuring smooth communication without changes in sales or construction management. 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

We have obtained construction industry licenses as well as permits for industrial waste collection and transportation. 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 every year. If you have concerns about the warranty, please click on the image above for confirmation.

5. Flexible and Prompt Response

We are equipped to handle various exterior troubles and situations. Even if you 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 our customers’ wishes and also accept emergency measures for sudden leaks from the exterior walls only.

6. Human Resource Development

We create various models for skill enhancement and conduct practical training. Since exterior renovations differ in construction methods and materials based on existing materials and shapes, we regularly conduct technical improvement 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 is dedicated to helping you choose colors and designs for your important building renovations, both exterior and interior, to ensure your 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 create simulations from actual photos of your building and propose several patterns with our recommended color schemes. We also accommodate “test painting” and “arranging paint boards” 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 image, such as a modern style, we will suggest recommended simulations. We create realistic perspectives from actual floor plans.

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

More customers are introducing solar equipment, which has generous subsidies, in conjunction with renovations of used properties. Kakeru Koumuten Co., Ltd. also handles solar equipment installation and will 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 Minamiashigara City | Frequently Asked Questions

We will answer the most frequently asked questions from those considering renovations of used properties and vacant houses in Minamiashigara City.

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

If possible, please consult us before making a purchase decision. Used properties often have deterioration that is not visible, and it is not uncommon to encounter cases where “unexpected construction costs arose” after purchase. By having Kakeru Koumuten check the condition of the property you are considering in advance and providing an estimate for necessary renovations, you can establish a feasible financial plan.

What renovations should be prioritized for a used detached house in Minamiashigara City?

It depends on the condition of the building, but we prioritize areas that, if neglected, could lead to further damage, such as leaks, termites, structural issues, and seismic resistance. After that, we will decide the order of renovations for roof and exterior walls, water areas (kitchen, bathroom, toilet), and insulation according to your budget and impact on daily life. In the nature-rich residential area spreading at the foot of the Ashigara mountains, roofs and exterior walls often reach the end of their lifespan first, so we recommend starting with a comprehensive inspection of the building, including the exterior.

I bought a used detached house in Minamiashigara City. What should I look at first?

Minamiashigara City is located at the foot of the Ashigara Mountains, where there are temperature differences. Insulation renovations (such as windows and inner windows) are effective for countering the cold and condensation in winter. First, we recommend checking the exterior such as roofs and walls, water areas, and seismic and insulation. For residential properties in hilly areas, it’s also important to check retaining walls and drainage. We will provide cost-effective proposals, including the Minamiashigara City wooden house seismic renovation subsidy (1/2, up to 400,000 yen) and insulation renovation subsidies based on national and prefectural assistance (up to 75,000 yen), which are expected to be available even for contractors outside the city.

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

The cost of a full renovation for a detached house varies greatly depending on the scope and grade. If focusing on partial renovations, it typically starts from around 5 million yen, while large-scale renovations that include interior and exterior work, water areas, insulation, and seismic upgrades can exceed 10 million to 20 million yen. We will first conduct a site survey to assess the condition 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 system. For example, the national “Mirai Eco Housing 2026 Project” requires registered contractors (construction companies) to apply. For seismic renovations or housing modifications under nursing care insurance in your city or ward, the application is generally made by the individual, but we will guide you through the necessary documents and process. We will organize and inform you about “which systems can be used,” so please feel free to consult with us first.

What risks are there if I leave a vacant house as it is?

Risks include the progression of leaks and termite damage, depreciation of asset value due to deterioration of exterior walls and roofs, 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 fixed asset tax exemption for residential land will be revoked. Early inspections and necessary renovations according to your plans to live in, rent out, sell, or utilize the property can ultimately help reduce costs.

I am worried about seismic resistance. How can I assess the seismic resistance of a used detached house?

The construction date 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 of joint and foundation regulations). For wooden detached houses built before that, we recommend a seismic diagnosis. There are also seismic renovation subsidies for wooden houses in your city or ward, which can significantly reduce costs if eligible (for details, see the subsidy section above). Kakeru Koumuten Co., Ltd. will assist you from diagnosis to renovation.

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

This depends on the scope of the work. Exterior renovations and partial interior work can often be done while you remain in your home, but 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 Minamiashigara City within your service area? Will there be travel expenses?

Yes, Minamiashigara City is within the service area of Kakeru Koumuten Co., Ltd. Our headquarters is located in Aoba-ku, Yokohama, and we primarily operate from five bases 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.

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

10Features of Minamiashigara City

Minamiashigara City is a nature-rich town at the foot of the Ashigara Mountains, known for the Kintaro legend and Daiyuuzan Saijouji Temple. The Daiyuuzan Line runs through the area, and it is close to Hakone and Odawara, making it a residential area that combines greenery and livability.

As the post-war single-family home areas reach a generational transition, the choice of living on through used homes plus renovations has taken root. Kakeru Koumuten, headquartered in Aoba-ku, Yokohama, widely accepts exterior and interior renovations throughout Kanagawa and Tokyo. We can handle everything from exterior wall overlay methods with in-house construction.

Renovation Service Areas

Kakeru Koumuten accepts requests primarily in Kanagawa and Tokyo.

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