[Yokohama City] Leave the renovation of vacant houses and used single-family homes to Kakeru Koumuten Co., Ltd.!

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Welcome to Kakeru Koumuten Co., Ltd., your trusted partner for roofing, rain gutters, and exterior painting services.

We pride ourselves on our quality workmanship and customer satisfaction.

Contact us today to discuss your project needs!

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01Reasons for the Increase in Renovations of Used Properties and Vacant Houses in Yokohama City

Yokohama City is a designated city with a population of approximately 3.76 million and 18 administrative wards, making it the most populous designated city in Japan. The characteristics of Yokohama include a city center (Naka-ku, Nishi-ku, Minami-ku) that opens to the sea, suburban residential areas in hilly regions (Aoba-ku, Kohoku-ku, Totsuka-ku, etc.), and coastal areas (Kanazawa-ku, Isogo-ku), where the nature of housing varies significantly by ward.

Moreover, Yokohama City has many large-scale residential areas and complexes developed from the period of rapid economic growth to the late Showa era, many of which have buildings over 40 years old. This is why the option of “buying a used house or apartment and renovating it to suit our lifestyle” is becoming increasingly popular across all wards in Yokohama 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 utilizing renovated used properties. There is growing interest in the lifestyle of purchasing used homes and renovating or remodeling them. Here, we explain the typical reasons for renovating vacant houses and used properties.

Reason 1 To Live Comfortably as Your Own Home

A typical reason for purchasing and renovating a used property is “to live comfortably.” Older homes often have issues with roofs, exterior walls, and plumbing, making them difficult to live in 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, depending on the property price and scope of work, you can achieve a home that fits your family’s lifestyle while keeping costs lower than new construction.

Reason 2 To Increase Asset Value for Sale

There are cases where used properties are purchased and renovated for the purpose of resale. Used homes may be evaluated at a low asset value as they are, but renovations can enhance their appearance and performance, increasing their value as a property.

Reason 3 Utilizing as an Investment or Business

When purchasing for investment or business purposes, renovations may be necessary. By transforming into a highly designed rental or share house, you can differentiate from other properties, and depending on the location and planning, you can also expect an increase in profitability. Depending on the property price and scope of work, initial costs can be lower than new construction, and depending on the use and conditions, there may be cases where subsidies and tax incentives apply, making it an option to utilize 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 choose a contractor you can trust to handle the 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 Deterioration of the Building

For used properties and vacant houses, it is crucial to confirm which parts have deteriorated and to what extent in advance. Since there have been other occupants, 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

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 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-resistant 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 crucial 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 or Used Properties

The renovation costs for used properties and vacant houses vary greatly depending on the degree of damage and the scope of work. First, please understand the approximate costs by area to use 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 specified 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.

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

05[Latest 2026] Subsidies and Grants Available in Yokohama

*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 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.” Construction for insulation, windows, and water heaters may be eligible for these subsidies.

Yokohama City Programs

See also about 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 applied based on the year-end balance.
• Renovation Promotion Tax System (Investment-type Tax Reduction): For construction such as seismic, 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 seismic renovations, energy-saving renovations, and barrier-free renovations.
• Kanagawa Prefecture Existing Housing Energy-saving 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, only via electronic application and on a first-come, first-served basis (about 25 cases). Applicants must apply 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. Kakeru Koumuten will organize and propose which systems can be used for your construction after conducting a site survey.

06Customer Voices

Bathroom and Toilet Renovation Case Studies

This is a case study where a three-point unit consisting of a bathtub, toilet, and washbasin was renovated by removing the bathtub and separating the shower room and toilet. We utilized the limited space to create user-friendly areas for both bathing and toilet use.

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

There are many renovation companies that cater to Yokohama, and it can be confusing to decide which one to choose. When requesting a renovation, be sure to check the following 5 points.

1. Experience in Renovation Work

Many renovation contractors publish their work results on their websites. If a contractor provides detailed explanations of the process with photos, it makes it easier to visualize the outcome after hiring them, giving you peace of mind. If you’re feeling uncertain, choose a contractor with ample 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 posts. In particular, Google reviews are useful, but don’t make your decision based solely on reviews; evaluate them alongside work results, estimates, and warranty details for a comprehensive judgment.

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 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, allowing for annual inspections.
Click here for more details on Kakeru Koumuten’s warranties and aftercare services

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, aftercare services, and costs can vary significantly. Having multiple estimates makes it easier to negotiate prices.

When comparing estimates, look closely at not just the costs, but also the “items in the estimate,” “check the undercoat materials, sealing materials, and paint for ancillary parts,” and “confirm the process.” Lowering the rank of ancillary parts or skipping steps can reduce costs, so it’s important not to judge solely by price.
Click here to see detailed points for comparing estimates

4. Confirm whether the contractor 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 performs the construction, it is important to confirm whether the contracted company understands the construction details and has clear responsibilities for quality control and guarantees. With in-house construction, it is easier to coordinate with the site, allowing for a quicker response in the event of any issues.

5. Do they offer color simulations and perspective drawings?

Choosing colors and envisioning the look after construction can be challenging for both exteriors and interiors. With simulations, you can reduce the risk of mistakes like “it looked different from what 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 Yokohama

One reason is that “Kakeru Koumuten is closely connected to Yokohama City,” but
“our unique initiatives in the renovation of vacant and used properties that cannot be imitated by other companies”
have received high praise from many customers.

1. Equipment Specialized for In-House Renovations

At Kakeru Koumuten Co., Ltd., we have established warehouses and material storage areas to provide high-quality renovations at low costs. We have five bases for material storage and showrooms located within Yokohama City.

In-House Ownership of 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 for approximately 50 houses.

Materials stored in our large in-house warehouse

We store roofing materials and paints. By placing large orders at once, we can purchase 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, 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, 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 range of catalogs. You can also confirm heat resistance using a heat insulation paint testing machine and color simulation. It is just a 3-minute walk from Edagawa Station, easily accessible from various wards in 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 personnel for sales and construction management. All work, from temporary scaffolding installation 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 and 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 as well.

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 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 altitudes, 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 vary in construction methods and materials based on existing materials and shapes, we regularly conduct technical improvement education to ensure 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 provide 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. We also handle solar panel and storage battery installation work!

More customers are introducing solar equipment, which has generous subsidies, in line 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 Yokohama | Frequently Asked Questions

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

Is it better to renovate after buying a used property or consult before buying?

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.

For a used detached house in Yokohama, what renovations should be prioritized first?

It depends on the condition of the building, but we prioritize areas that, if left unattended, could lead to further damage, such as leaks, termites, and structural or seismic issues. After that, we decide on the order of exterior renovations such as roofs and walls, water areas (kitchen, bathroom, toilet), and insulation based on your budget and the impact on your daily life. In large residential areas developed in the late Showa period within Yokohama, there are buildings over 40 years old, so we recommend starting with a comprehensive inspection of the entire building, including the exterior.

Yokohama has many hills and coastal areas; do the considerations change by area?

Yes, the environment in Yokohama varies significantly by district. In coastal areas such as Kanazawa-ku, Isogo-ku, and Naka-ku, the sea breeze (salt damage) can accelerate corrosion of metal parts, making it important to choose materials with rust prevention and weather resistance in mind. In hilly areas and valleys, sunlight and humidity can vary greatly, necessitating measures against moisture and consideration for moss and algae. Additionally, in locations with many slopes, care must be taken regarding the installation of scaffolding and the transportation of materials. As a local contractor familiar with the city of Yokohama, Kakeru Koumuten Co., Ltd. will provide proposals tailored to the location.

How much does a full renovation (full remodel) 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, plumbing, insulation, and seismic upgrades can exceed 10 million to 20 million yen. First, we will 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” has a system where registered contractors (construction companies) apply. We will inform you about the feasibility of handling this at Kakeru Koumuten Co., Ltd. and the necessary documents before you sign a contract. For seismic renovations and home modifications under the nursing care insurance in Yokohama City, the application is generally made by the individual, but we will guide you through the necessary documents and process. We will also organize and inform you about “which programs can be used.”

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

Risks include the progression of water 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 special exemption for residential land property tax will be revoked. Conducting inspections early and performing necessary repairs according to your plans to live in, rent, sell, or utilize the property can ultimately help reduce costs.

I am concerned about seismic resistance. How can I assess the seismic safety 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. Yokohama City has a “Wooden House Seismic Renovation Promotion Project” (up to 1.15 million yen for general households), which can significantly reduce costs if eligible. 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 plumbing, we may recommend temporary housing. The estimated duration is about 2 to 4 weeks for exterior work and about 1 to 3 months or more for full renovations. We will provide you with a schedule in advance and propose a plan that minimizes the impact on your daily life.

Is Yokohama City within your service area? Will there be travel costs?

Yes, Yokohama City is within the service area of Kakeru Koumuten Co., Ltd. Our headquarters is located in Aoba-ku, Yokohama, and we have five bases throughout the city, allowing us to serve the entire Yokohama City. 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 Yokohama City

Yokohama City is the capital of Kanagawa Prefecture, with a population of approximately 3.76 million and 18 administrative wards, making it the most populous designated city in Japan. The city features a diverse landscape, from urban areas like Minato Mirai and Kannai to coastal areas like Kanazawa-ku and Isogo-ku, as well as hilly residential areas like Aoba-ku, Tsuzuki-ku, and Totsuka-ku.

Many residential areas and complexes were developed on a large scale after the period of rapid economic growth, and among them are numerous buildings that have exceeded 40 years in age. There is an option to purchase used houses or apartments, renovate them, and continue living in them for a long time after checking the condition of the buildings.

Kakeru Koumuten is headquartered in Aoba-ku, Yokohama, and we widely accept exterior and interior renovations throughout Yokohama City from our five bases. We can perform all work, including exterior wall overlay methods, in-house. Please feel free to consult with us if you have any concerns.

Areas We Serve for Renovations

Kakeru Koumuten accepts requests throughout Kanagawa Prefecture and Tokyo. We serve all 18 wards of Yokohama City listed below.

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