[Miura District, Hayama Town] Vacant House and Used Property Renovation | Costs, Subsidies, and Case Studies

For those considering renovation of used properties and vacant houses in Hayama Town

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, which has many achievements in Hayama Town, will clearly explain the points for a successful renovation.

Get estimates from at least 3 companies!

01Reasons for the Increase in Renovations of Used Properties and Vacant Houses in Hayama Town

Hayama Town is a popular area known for its imperial villa and yacht harbor, making it a desirable residential area overlooking Sagami Bay. Adjacent to Zushi, it boasts a calm living environment surrounded by the sea and greenery, maintaining strong popularity as a vacation home and relocation destination.

Old wooden houses and villas built on slopes or along the coast are at a stage where they require updates for seismic resistance, insulation, and salt damage. Therefore, the option of “buying a used detached house or villa and renovating (renovation) it to suit one’s lifestyle” is expanding in Hayama Town.

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. Interest in purchasing used homes for renovation and revitalization is growing. Here, we explain the typical reasons for renovating vacant houses and used properties.

Reason 1 To Live Comfortably as Your Own Home

One of the main reasons for purchasing and renovating a used property is “to live comfortably.” Older homes often have issues with roofs, exterior walls, and plumbing, making them less livable as they are. By renovating and upgrading facilities and interiors, you can create a comfortable living environment. Additionally, by changing the layout or refreshing the interior, you can finish a home that suits your family’s lifestyle while keeping costs lower than new construction depending on the renovation details.

Reason 2 To Increase Asset Value for Sale

More people are purchasing and renovating used properties with the aim of selling them. Used homes are often valued low as they are, but renovations can enhance their appearance and performance, increasing their value as properties.

Reason 3 To Utilize as an Investment or Business

When purchasing for investment or business purposes, renovations are essential. By transforming properties into stylish rentals or share houses, you can differentiate them from other properties, and depending on the location and planning, you can also expect an increase in profitability. Compared to new constructions, initial costs can be reduced, and depending on the use and conditions, there may be eligibility for subsidies and tax incentives, leading to an increase in the number of people utilizing vacant houses for business.

03Points to Consider When Renovating Vacant or 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 renovations. 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 that 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 are deteriorating and to what extent beforehand. Since there have been other occupants, the 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 performance.

Point 4 Check Subsidy Programs and Renovation Tax Deductions

To reduce construction costs, 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 resistance renovations, energy-saving construction, and barrier-free renovations. Tax deductions include the “housing loan tax deduction” when using a housing loan, and there are systems where part of the costs can be deducted 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 effectively as a key to successful renovation (for the latest information, see this subsidy section).

04Cost Estimates for Renovating Vacant and Used Properties

The renovation costs for used properties and vacant houses vary significantly depending on the level of damage and the scope of work. First, please understand the approximate market prices by area as a guideline for your financial planning (the table below provides general estimates for typical detached houses. 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 and Infrastructure

5. Waterproofing and Earthquake Resistance

6. Exterior Work

* 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.

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

05[Latest 2026] Subsidies and Grants Available in Hayama Town

* The following information is as of September 8, 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 necessary documents, but the applicant and application method may vary depending on the system.

National System: Housing Energy Saving 2026 Campaign

The government is implementing multiple subsidy projects targeting energy-saving renovations under the “Housing Energy Saving 2026 Campaign.” Insulation, windows, and water heater work may be eligible for these subsidies.

Hayama Town Programs

06Customer Voices

Roof Overlay Construction Case Studies in Hayama Town

07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Hayama Town

There are many renovation companies that serve Hayama Town, 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 construction 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 are unsure, 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 the construction achievements, estimates, and warranty details for a comprehensive judgment.

2. Check for Warranties and Aftercare Services

When choosing 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 depending on the contractor, the nature of the work, and the materials used, but it is often set between 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer aftercare services in addition to 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 notification 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 companies)

When requesting renovations, be sure to obtain estimates from multiple contractors. Even for the same work, warranties, after-sales services, and prices can vary significantly. Having multiple estimates makes price negotiations easier.

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

4. Confirm whether the company performs renovations in-house

Kakeru Koumuten Co., Ltd. conducts detailed hearings and investigations regarding the existing “condition,” “location,” “substrate,” “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 work details and clearly defines the responsibilities for quality control and warranties. If the work is done in-house, it is easier to coordinate with the site, and in case of any troubles, it becomes easier to respond quickly.

5. Check if they offer color simulations and perspective drawings

Choosing colors and visualizing the image after construction can be challenging for both exterior and interior work. With simulations, you can reduce the risk of the mistake of “it turned out differently than I imagined.” Since it is difficult to redo once the work is done, it is recommended to choose a company that can provide flexible simulations.

08Reasons why Kakeru Koumuten is chosen for renovations of used houses in Hayama Town

One reason is that Kakeru Koumuten Co., Ltd. also serves Hayama Town,
and our unique initiatives in “vacant house and used property renovations” that cannot be imitated by other companies
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 five bases within Yokohama City 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 cuts on scaffolding work. We own enough scaffolding materials for approximately 50 houses.

Storage of Materials in Our Large In-House Warehouse

We store roofing materials and paints. By ordering in bulk 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 that can handle different types of construction, such as 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 separating and recycling waste materials.

Exterior Renovation 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 verify thermal insulation properties using color simulation and thermal insulation testing equipment. The showroom is a 3-minute walk from Eda Station in Aoba Ward, Yokohama City.

2. Complete In-House Construction

A major strength of Kakeru Koumuten is 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 personnel for sales and construction management, allowing for smooth communication. From setting up temporary scaffolding to exterior wall painting and roof renovations, all work is performed by our own 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 and permits for industrial waste collection and transportation. We have nationally certified sheet metal workers and painting specialists on staff, and we are confident in our construction techniques. We are also 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 the image above for more information.

5. Flexible and Prompt Response

We are equipped to handle various exterior troubles and situations. If we 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 repairs for sudden leaks from exterior walls only.

6. Human Resource Development

To improve skills, we create various models 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 so 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

In addition to color simulations for exterior wall painting, we can also simulate 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 the 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 propose recommended simulations. We create realistic perspectives based on actual floor plans.

8. Solar Panel and Storage Battery Installation Work Also Available!

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.

09Used Properties and Vacant House Renovation in Hayama Town | Frequently Asked Questions

We answer the most frequently asked questions from those considering renovations of used properties and vacant houses in Hayama Town.

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

10Features of Hayama Town

Hayama Town is known for its imperial villa and yacht harbor, making it a popular area for vacation homes and residential areas overlooking Sagami Bay. Adjacent to Zushi, it boasts a calm living environment surrounded by the sea and greenery, maintaining its strong popularity as a vacation and relocation destination.

Old wooden houses and vacation homes on slopes and along the coast are reaching a generational transition, leading to increased demand for earthquake resistance, insulation, and salt damage countermeasures for used homes plus renovations. Kakeru Koumuten is headquartered in Aoba Ward, Yokohama City, and offers a wide range of exterior and interior renovations throughout Kanagawa Prefecture. We can perform all work in-house, including exterior wall overlay methods.

Areas Available for Renovation

Kakeru Koumuten accepts requests throughout Kanagawa Prefecture and Tokyo.

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