[Isogo-ku, Yokohama] Renovation of Used Properties and Vacant Houses | Costs, Subsidies, and Case Studies

Our Services

At Kakeru Koumuten Co., Ltd., we specialize in a variety of construction services to enhance your home’s exterior. Our offerings include:

Roofing

We provide expert roofing solutions, including the roof overlay (cover method) to ensure durability and protection against the elements.

Rain Gutters

Our rain gutter installation services are designed to effectively manage water flow and protect your property from water damage.

Exterior Painting

We offer professional exterior painting services to refresh and protect your home’s exterior, enhancing its curb appeal.

Contact us today to learn more about our services and how we can assist you with your construction needs!

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Subsidy Information

Frequently Asked Questions

What types of roofing services do you provide?

We specialize in roof overlay (cover method), rain gutter installation, and exterior painting.

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01Reasons for the Increase in Renovations of Used Properties and Vacant Houses in Aoba-ku

Aoba-ku, Yokohama faces Tokyo Bay and features residential areas and large-scale housing complexes such as Negishi, Sugita, and the hilly residential areas of Yokohama and Shio-midai. It has both coastal and hilly landscapes, with good access to the city center via the Keihin-Tohoku and Negishi lines.

Large-scale housing complexes and detached houses developed during the Showa era, such as the Yokohama housing complex, are entering a period of generational change, with buildings around 40 to 55 years old. This is why the option of “buying a used detached house or housing complex and renovating (renovating) it to fit one’s lifestyle” is expanding in Aoba-ku.

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 by purchasing and renovating 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 used properties is “to live comfortably.” Older houses often have issues with roofs, exterior walls, and plumbing, making them uncomfortable to live in as they are. By renovating and upgrading the facilities and interiors, you can create a comfortable living environment. Furthermore, with changes to the layout and refreshing the interior, depending on the renovation work, you can achieve a home that suits your family’s lifestyle while keeping costs lower than new constructions.

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 lower asset value as they are, but renovations can enhance their appearance and performance, increasing their value as properties.

Reason 3 To Utilize as Investment or Business

For purchases aimed at investment or business, 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, they may also qualify for subsidies and tax incentives, 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 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 have deteriorated and to what extent in advance. Since the property has been lived in by someone else, many internal damages are often not apparent without investigation. Conduct a current condition survey before starting construction to identify 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 construction 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 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 strategically utilize them 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 extent of damage and the scope of work. First, please understand the approximate costs by area 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 Facilities

4. Equipment & Infrastructure

5. Waterproofing & 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 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!

05[Latest 2026] Subsidies and Grants Available in Isohama Ward

*The following information is as of September 3, 2026. The content, duration, and budget of the systems change each fiscal year, 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 applicant and application methods vary by 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.

Yokohama City Program

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, barrier-free renovations, etc.
• 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 recruitment is scheduled from September 7 to September 30, 2026, only by 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 Feedback

Roof Overlay Construction Case in Isohama-ku

07How to Choose a Remodeling Contractor for Used Properties and Vacant Houses in Isogo-ku

There are many remodeling companies that serve Isogo-ku, and it can be confusing to decide which one to choose. When requesting a remodel, be sure to check the following five points.

1. Extensive Experience in Remodeling Work

Many remodeling 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’re uncertain, choose a contractor with extensive 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. Google reviews are particularly useful, but don’t decide based solely on reviews; consider the construction achievements, estimates, and warranty details for a comprehensive judgment.

2. Check for 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 it is often set between 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer after-sales services separate from warranties, so be sure to check that as well.

Kakeru Koumuten Co., Ltd. provides a warranty for all exterior renovations and sealing work. We also conduct aftercare maintenance and send out annual notification DM to ensure annual inspections are possible.
Click here for more details on Kakeru Koumuten’s warranty and aftercare maintenance

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 service, and prices can vary significantly. Having multiple estimates makes price negotiations easier.

When comparing estimates, it is important to look at not only the costs but also the “items in the estimate,” “check the undercoat materials, sealing materials, and paint for auxiliary parts,” and “confirm the process” in detail. Lowering the rank of auxiliary parts or skipping steps can reduce costs, so it is essential to not judge solely based on price.
See detailed points for 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,” “base materials,” “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 contracting company understands the work details and has clear responsibilities for quality control and warranties. If the work is done in-house, it is easier to coordinate with the site, making it quicker to respond 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 work. Having simulations can reduce the risk of mistakes like “it looks different from what I imagined.” Since it is difficult to redo once the work is done, it is advisable to choose a company that can flexibly accommodate simulations.

08Reasons why Kakeru Koumuten is chosen for used house renovations in Iso-ku

One reason is that Kakeru Koumuten Co., Ltd. serves Isogo Ward, but
our unique approach to “renovating vacant houses and used properties” that cannot be imitated by other companies
has received high praise from many customers.

1. Equipment Specialized for In-House Renovations

At Kakeru Koumuten, we have organized warehouses and material storage areas to provide high-quality renovations at low costs. We have 5 bases located 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 in-house scaffolding materials and team. By not outsourcing, we achieve cost savings on scaffolding work. We own scaffolding materials 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 separates and recycles waste materials, significantly reducing waste disposal costs.

Exterior renovation dedicated 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 confirm heat insulation properties using color simulation and heat-resistant paint testing equipment. The showroom is a 3-minute walk from Eda Station in Aoba-ku, Yokohama. It is easily accessible from within 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 delivering 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 installation 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. Obtaining 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 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 Maintenance

Exterior painting and joint sealing work come with a warranty. Aftercare maintenance is available annually, and we send out notification DM each year. If you have concerns about the warranty, please click on the image above for more information.

5. Flexible and Prompt Response

We are equipped to handle various exterior troubles and situations. If you cannot access the roof due to height, we can respond using a drone. For leak investigations, we also use a thermal imaging camera. We respond according to our customers’ wishes and we also accept emergency repairs for sudden leaks from exterior walls.

6. Human Resource Development

We create various models to enhance skills and conduct practical training. Since the construction methods and materials used for exterior renovations differ based on existing materials and shapes, we conduct regular technical 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 renovations!

Kakeru Koumuten Co., Ltd. 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 generate 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 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 designs. Realistic perspectives are created from actual floor plans.

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

Some customers consider introducing solar equipment in conjunction with renovations of used properties. Kakeru Koumuten Co., Ltd. also handles solar equipment installation and can propose solar panels tailored to the shape of your roof. We can also accept requests for estimates and power generation simulations only.

空き家を放置すると、劣化が進み、周囲の環境にも悪影響を及ぼす可能性があります。特に、雨漏りやシロアリの被害が広がることが多く、修繕費用が高額になることもあります。また、空き家は不法侵入や火災のリスクも高まります。早めにリフォームを行うことで、これらのリスクを軽減し、資産価値を維持することが重要です。