[Fujisawa City] Renovation of Vacant Houses and Used Properties | Costs, Subsidies, and Case Studies

For those considering renovations of used properties and vacant houses in Fujisawa City

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 Fujisawa City, will clearly explain the key points for a successful renovation.

Always obtain estimates from at least 3 companies!

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

Fujisawa City is a popular central city of Shonan, with a diverse range of residential areas from Enoshima and Shonan Coast to the northern Shonan Life Town. It is well connected by JR, Odakyu, and Enoden, providing good access to the city center.

Residential areas developed in the late Showa period, such as Shonan Life Town, are now entering a generational transition period, with many homes reaching 40 to 50 years old, and locations near the sea face challenges related to salt damage. This is why the option of “buying a used detached house and renovating (renovation) it to suit your lifestyle” is expanding in Fujisawa 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 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

The most common reason for purchasing and renovating a used property is “to live comfortably.” Old houses often have issues with the roof, 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, by changing the layout and refreshing the interior, you can finish a home that suits your family’s lifestyle while keeping costs lower than new construction.

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 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

For purchases made for investment or business purposes, 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 qualify for subsidies or tax incentives, leading to an increase in those 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 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 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 Condition of the Building

For used properties and vacant houses, it is crucial to confirm which parts have deteriorated 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 understand 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 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 “housing loan tax deductions” when using a mortgage, 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 for 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 extent 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 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 & 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 of 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.

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

05[Latest 2026] Subsidies and Grants Available in Fujisawa City

*The following information is as of September 4, 2026. The content, duration, and budget of the systems change annually, and many will end once the budget limit is reached. Please check for the latest information with our company or each contact point before applying. Kakeru Koumuten can assist with confirming the systems and necessary documents, but the applicants 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 combined subsidies.

Fujisawa City Program

06Customer Voices

Exterior Renovation Case Studies in Fujisawa City

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

There are many renovation companies that serve Fujisawa City, and it can be confusing to choose the right one. When requesting renovations, be sure to check the following 5 points.

1. Experience in Renovation Work

Many renovation contractors publish their project results on their websites. If a contractor provides detailed explanations of the process with photos, it makes it easier to envision the outcome after the request, providing peace of mind. If you’re uncertain, 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. In particular, Google reviews are useful, but do not make your decision based solely on reviews; assess the overall picture by considering project results, estimates, and warranty details.

2. Confirm the presence of warranties and aftercare services

When choosing a contractor, be sure to check for the presence of warranties. If repairs are needed within the warranty period, they may be done for free. The duration varies by contractor and paint type, but generally ranges from 1 to 10 years (emergency repairs and partial fixes 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, sending out annual notification DM 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 companies)

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 price negotiations easier.

When comparing estimates, it’s important to look 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” in detail. Lowering the rank of ancillary parts or skipping steps can reduce costs, so it’s crucial to not judge solely based on price.
Learn more about points to compare estimates

4. Confirm whether they perform 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 most suitable 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, allowing for quicker responses in case of any issues.

5. Check if they offer color simulations and perspective drawings

Choosing colors and visualizing the outcome for both exterior and interior projects can be challenging. With simulation, you can reduce the risk of disappointment from “it looks different 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 Fujisawa City

One reason is that “Kakeru Koumuten also serves Fujisawa City,” 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

Kakeru Koumuten has organized warehouses and material storage to provide high-quality renovations at low cost. We have five bases for material storage and showrooms located within Yokohama City.

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 in scaffolding work. We own scaffolding materials for approximately 50 detached houses.

Materials stored in our large in-house warehouse

We store roofing materials and paints. By placing bulk 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, we significantly cut waste disposal costs by separating 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 variety of catalogs. You can also confirm heat insulation properties using a heat insulation paint testing machine and color simulation. 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 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 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 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 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. If you 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 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 the construction methods and materials used for exterior renovations differ based on existing materials and shapes, we regularly conduct technical improvement 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, 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 suggest several patterns with our recommended color combinations. We also accommodate “test painting” and “arranging paint boards” to confirm the actual colors.

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 suggest 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 power systems, which have substantial subsidies, in line with renovations of used properties. Kakeru Koumuten Co., Ltd. also handles solar power installation work and will propose solar panels tailored to the shape of your roof. We can also provide estimates and power generation simulations upon request.

09Renovation of Used Properties and Vacant Houses in Fujisawa City | Frequently Asked Questions

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

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

10Features of Fujisawa City

Fujisawa City is very popular as the central city of Shonan, with a variety of residential areas stretching from Enoshima and Shonan Beach to the northern Shonan Life Town. It is well-connected by JR, Odakyu, and Enoden, providing good access to the city center.

Large-scale residential areas from the late Showa period and wooden houses in the old town are reaching a generational transition, leading to an increased demand for used properties and renovations, including measures against salt damage. Kakeru Koumuten, headquartered in Aoba-ku, Yokohama, widely accepts exterior and interior renovations throughout Kanagawa and Tokyo. We can also handle roof overlay (cover method) with our own construction.

Areas Available for Renovation

Kakeru Koumuten accepts requests primarily in Kanagawa and Tokyo.

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