[Miyamae-ku, Kawasaki] Used Detached House / Vacant House | About Subsidies, Costs, and Choosing Contractors

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For those considering renovation of used properties and vacant houses in Miyamae-ku

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 close to Miyamae Ward, will clearly explain the 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 Miyamae Ward

Miyamae Ward in Kawasaki City is a green area where residential areas developed taking advantage of the undulations of the Tama Hills spread around Miyamaedaira and Saginuma on the Tokyu Den-en-toshi Line. Due to its good access to the city center, it is popular, especially for single-family homes.

In residential areas developed from the late 1960s to the 1980s, there is an increasing number of buildings that are over 40 to 50 years old, reaching a time for generational change and renewal. This is why the option of “buying a used single-family home and renovating (renovating) it to fit our lifestyle” is expanding in Miyamae Ward.

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 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 in 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 upgrading the facilities and interiors, you can create a comfortable living environment. Additionally, depending on the property price and scope of renovations, it is possible to achieve a home that suits your family’s lifestyle while keeping costs lower than new construction through changes in layout and interior updates.

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 undervalued as they are, but renovations can enhance their appearance and performance, increasing their value as properties. However, it is important to note that the selling price may not necessarily increase by the amount spent on renovations, so it is crucial to determine the scope of work considering the surrounding market and the target buyer demographic.

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 also 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 Houses and Used Properties

Point 1 Choose a Reliable Construction Company

First and foremost, it is essential to choose a contractor that 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 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 check which parts have deteriorated and to what extent in advance. 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

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 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.

Point 4 Check Subsidy Programs and Renovation Tax Reductions

To keep construction costs down, checking for subsidies and renovation tax reductions is important. Subsidies are provided by the national and local governments, supporting part of the costs for earthquake-resistant renovations, energy-saving construction, and barrier-free renovations. Tax reductions include the “housing loan tax reduction” 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 crucial to check in advance and plan to utilize them effectively as a key to successful renovations (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 level of damage and the scope of work. First, please understand the approximate market prices by area to help with 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 Facilities

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. Please confirm the exact costs through a free on-site survey and estimate.

Please check the construction menu and price list for more details!

It is also possible to get a non-face-to-face estimate based on photos, blueprints, or quotes from other companies

05[Latest 2026] Subsidies and Grants Available in Miyamae-ku

*The following information is as of August 28, 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 application method and applicants 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.” Construction for insulation, windows, and water heaters may be eligible for these combined subsidies.

Kawasaki City Programs

06Customer Feedback

Interior Renovation Case Study | Wallpaper Replacement

This is a case study of replacing indoor wallpaper using mass-produced wallpaper. A blue accent was added to one wall against a white base, creating a bright and calm space.

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

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

1. Rich 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 helps you visualize the outcome after the request, giving you peace of mind. If you are unsure, choose a contractor with rich 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 your decision based solely on reviews; evaluate them comprehensively along with construction achievements, estimates, and warranty details.

2. Confirm 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 by contractor, type of work, and materials used, but typically ranges from 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer after-sales 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 after-sales maintenance, sending out annual notification DM to ensure annual inspections are possible.
Click here for more details on Kakeru Koumuten’s warranties and after-sales maintenance

3. Obtain estimates from multiple contractors (at least 3)

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, look closely at not only the cost but also the “scope of work,” “materials/products used,” “scope of construction,” “underlying repairs,” “waste disposal,” “process,” and “warranty.” Costs can decrease by changing the grade of materials or the scope of construction, so it is important not to judge solely by price.
Click here for detailed points on comparing estimates

4. Confirm whether the company performs renovations in-house

At Kakeru Koumuten Co., Ltd., we conduct detailed hearings and investigations regarding the existing “condition,” “location,” “materials,” “desired durability,” and “design” to propose the optimal plan. While there is nothing inherently wrong with a system where a partner company carries out the construction, it is essential to confirm whether the contracting company understands the construction details and has clearly defined responsibilities for quality control and guarantees. With in-house construction, it becomes easier to coordinate with the site, allowing for a quicker response in case of any troubles.

5. Do they support 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 construction is done, it is advisable to choose a company that can accommodate flexible simulations.

08Reasons Why Kakeru Koumuten is Chosen for Renovations of Used Houses in Miyamae-ku

One reason is that “Kakeru Koumuten has a base near Miyamae-ku,” but
our unique approach to “renovating vacant 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 established warehouses and material storage areas to provide high-quality renovations at low costs. We have five bases within Yokohama City for material storage and showrooms.

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 reductions on scaffolding work. We own scaffolding materials sufficient for approximately 50 detached houses.

Materials stored 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 also have various tools ready for 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 all together, we separate and recycle waste materials, significantly reducing 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 a heat-resistant paint testing machine and color simulation. It is a 3-minute walk from Eda Station (Aoba-ku, Yokohama), connected by the Den-en-toshi Line. Access from Miyamae-ku is also convenient.

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 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 permits for the construction industry and for the collection and transportation of industrial waste. We also have nationally certified sheet metal and painting technicians 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 painting and joint sealing work come with a warranty. Aftercare is available every year, and we send out notification DM annually. If you are concerned 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 education to ensure that 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, 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 style, such as modern, we will propose recommended simulations. We create realistic perspectives from actual floor plans.

8. Solar Panel and Storage Battery Installation Work is also available!

Some customers introduce solar equipment in conjunction with the renovation of used properties. Kakeru Koumuten Co., Ltd. also supports 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 Miyamae-ku | Frequently Asked Questions

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

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10Features of Miyamae-ku

Miyamae-ku, Kawasaki City, is located in the northwest part of Kawasaki City and is a lush residential area directly connected to Shibuya via the Tokyu Den-en-toshi Line. Centered around Miyamaedaira and Saginuma, it features a residential area developed utilizing the undulations of the Tama Hills.

The residential areas developed from the late 1960s to the 1980s are now facing generational changes and building updates, making the option of renovating used homes a viable choice. Kakeru Koumuten, headquartered in Aoba-ku, Yokohama, responds quickly to requests in Miyamae-ku, which is connected by the Den-en-toshi Line. We can perform all work in-house, including exterior wall overlay methods.

Areas We Serve for Renovations

Kakeru Koumuten accepts requests throughout Kanagawa Prefecture and Tokyo.

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