[Miura-gun Hayama-cho] Renovation of Vacant Houses and Used Properties | 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 such concerns, Kakeru Koumuten Co., Ltd., which has numerous achievements in Hayama Town, will clearly explain the key points for a successful renovation.

Obtain at least 3 estimates!

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 villas and yacht harbor, offering a resort-like residential environment overlooking Sagami Bay. Adjacent to Zushi, it boasts a tranquil living environment surrounded by the sea and greenery, making it a favored choice for vacation homes and relocation.

Old wooden houses and villas built on slopes or by the sea are at a stage where they require upgrades for earthquake resistance, insulation, and salt damage. This is why the option of “buying a used single-family home or villa and renovating it to suit your 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 constructions but also for renovating used properties. There is a growing interest in living in renovated or 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

One of the main reasons 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 upgrading the facilities and interiors, you can create a comfortable living environment. Additionally, with changes to the layout and refreshing the interior, you can achieve a home that suits your family’s lifestyle while potentially keeping costs lower than new construction, depending on the scope of work.

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 in their current state, but renovations can enhance their appearance and performance, thereby 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 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 those utilizing vacant houses for business.

03Points to Note When Renovating Vacant Houses and Used Properties

Point 1　Choose a Reliable Contractor

First and foremost, it is essential to select a contractor you can trust to handle your renovation with peace of mind. For used properties, since there were previous occupants, the internal structure and condition are often not clear until you actually see them. Choose a contractor who can perform the work thoroughly according to your wishes, the structure of your home, and the surrounding environment, and who 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 other people have lived there before, internal damage is often not apparent without investigation. Conduct a current condition survey before starting work to identify 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 homes 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 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 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 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 degree of damage and the scope of work. First, please understand the approximate market prices 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 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 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 our 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 each contact point for the latest information before applying. Kakeru Koumuten can assist with confirming the systems and providing necessary documents, but the applicant and application method may vary by system.

National System: Housing Energy Saving 2026 Campaign

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

Hayama Town Programs

06Customer Voices

Roof Overlay Construction Examples in Hayama Town

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

There are many renovation companies that serve Hayama, 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 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 have concerns, choose a contractor with extensive 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 construction achievements, estimates, and warranty details for a comprehensive judgment.

2. Confirming the presence of warranties and after-sales maintenance

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 type of work, and the materials used, but it is often set between 1 to 10 years (emergency repairs or partial repairs are often not covered). Some contractors also offer after-sales services in addition to 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. Obtaining estimates from multiple contractors (at least 3 companies)

When requesting renovations, be sure to obtain estimates from multiple contractors. Even for the same construction 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 primer 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 is essential to not judge solely by the amount.
Learn more about the points to compare in estimates

4. Confirm whether the company performs renovations in-house

Kakeru Koumuten Co., Ltd. carefully listens to and investigates 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 has clear responsibilities for quality control and guarantees. If the work is done in-house, it is easier to coordinate with the site, allowing for quicker responses in case of any issues.

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 projects. With simulations, you 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 Hayama Town

One reason is that “Kakeru Koumuten also serves Hayama Town,” but
we have initiatives in “renovating vacant houses and used properties that other companies cannot replicate,”
which has 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 costs. We have 5 bases within Yokohama City for our material storage and showrooms.

In-House Scaffolding Materials

We can construct temporary scaffolding, which is essential for exterior renovations, using our in-house scaffolding materials and team. By not outsourcing, we can achieve cost reductions on scaffolding work. We have scaffolding materials sufficient for approximately 50 houses.

Storage of Materials in Our Large In-House 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 ready 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 our 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 insulation 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 skilled craftsmen. We are confident in our plans and costs, so we welcome competitive estimates.

3. Obtaining Various Permits and 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 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 we also accept emergency repairs for sudden leaks from exterior walls.

6. Human Resource Development

To improve skills, we create various models and conduct practical training. Since exterior renovations vary in construction methods and materials based on existing materials and shapes, we regularly conduct skill enhancement training to ensure each staff member can handle 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, ensuring your satisfaction with both exterior and interior work.

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 based on actual photos of your building and propose several patterns with our recommended color schemes. We also accommodate requests for “test painting” and “arranging paint boards” to confirm actual color tones.

7-2. Interior Renovation Simulation

We also support simulations and perspective drawings for interior renovations. We propose recommended simulations based on your preferred style, such as modern aesthetics. Realistic perspectives are created from actual floor plans.

8. Solar Panel and Battery Installation Work Available!

More customers are introducing solar equipment, which has abundant 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.

09Renovation of Used Properties and Vacant Houses 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.

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

10Features of Hayama Town

Hayama Town is known for its imperial villa and yacht harbor, making it a popular area as a resort and 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 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 properties + renovations. Kakeru Koumuten is headquartered in Aoba-ku, Yokohama, 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.

Service Areas for Renovations

Kakeru Koumuten accepts requests throughout Kanagawa and Tokyo.

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