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

私たちの屋根カバー工法は、既存の屋根の上に新しい屋根を重ねる方法で、耐久性と美観を兼ね備えています。雨樋の設置や修理も行っており、雨水の流れをスムーズに保つことができます。また、外装塗装では、建物を保護し、見た目を新しく保つための高品質な塗料を使用しています。

お見積もりは無料ですので、お気軽にお問い合わせください。私たちの専門チームが、あなたのプロジェクトをサポートいたします。

For those considering renovation of used properties and vacant houses in Koganei 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 Koganei City, will clearly explain the key 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 Koganei City

Koganei City in Tokyo is a residential area centered around Musashi-Koganei and Higashi-Koganei on the Chuo Line, blessed with famous cherry blossom spots like Koganei Park and the greenery of the Kokubunji Cliff Line. It is a popular area for families due to its calm living environment.

Houses developed during the Showa era are now entering a generational transition period, reaching 40 to 50 years old. This is why the option of “buying a used house and renovating (renovating) it to fit one’s lifestyle” is expanding in Koganei 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 renovating used properties. There is a growing interest in living in renovated or refurbished used homes. 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 homes 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, by changing the layout and refreshing the interior, you can achieve a home that suits your family’s lifestyle at a lower cost than new construction.

Reason 2 To increase asset value for resale

More people are purchasing and renovating used properties with the intention of resale. Used homes are often undervalued in their current state, 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 properties into stylish rentals or share houses, you can differentiate them from others, and depending on the location and planning, you can also expect improved profitability. Renovating can reduce initial costs compared to new construction, and depending on the purpose and conditions, there may also be subsidies or tax incentives, leading to an increase in people utilizing vacant houses for business.

03Precautions 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. 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 carry out the work properly 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 check which parts have deteriorated and to what extent in advance. Since other people have lived there before, the internal damage is often not apparent without investigation. Be sure to understand any hidden deterioration through a current condition survey before starting the work.

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 the 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 where part of the costs can be deducted for certain works even with personal funds. Since these can sometimes be used in combination, it is crucial to check in advance and plan to utilize them strategically for a successful renovation (for the latest information, see this subsidy section).

04 Cost 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 familiarize yourself with the approximate costs by area to serve 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 Supply 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 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.

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

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

* The following information is as of September 2, 2026. The content, duration, and budget of the systems change annually, and many will end once the budget limit is reached. Be sure to check the latest information at the official contact points for each system before contracting or starting work. Kakeru Koumuten can assist with confirming 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 subsidies when used in combination.

Tokyo Metropolitan Program

Koganei City Programs

06Customer Voices

Exterior Renovation Case Studies in Koganei City

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

There are many renovation companies that serve Koganei City, and it can be confusing to decide which one to choose. When requesting renovations, be sure to check the following five points.

1. Experience in Renovation Work

Many renovation contractors publish their work achievements on their websites. If a contractor provides detailed explanations of the process with photos, it makes it easier to visualize the outcome after the request, providing peace of mind. If you’re unsure, 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 the posts. Google reviews are particularly useful, but don’t make your decision based solely on reviews; consider the work achievements, estimates, and warranty details for a comprehensive assessment.

2. Check for Warranties and After-Sales Maintenance

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 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 construction work, warranties, after-service, and costs can vary significantly. Having multiple estimates makes price negotiations easier.

When comparing estimates, it is important to look closely at not just the costs, but also the “items in the estimate,” “check the undercoating materials, sealing materials, and paint for auxiliary parts,” and “confirm the process.” 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 conducts 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 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 clearly defines the 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. With simulations, you can reduce the risk of mistakes like “it looked different than I imagined.” Since it is difficult to redo once the work is done, it is recommended to choose a company that can provide flexible simulations.

08Reasons why Kakeru Koumuten is chosen for renovations of used houses in Koganei City

One reason is that Kakeru Koumuten Co., Ltd. serves Koganei 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

At Kakeru Koumuten, we have organized warehouses and material storage to provide high-quality renovations at low costs. We have 5 bases in Kanagawa and Tokyo, including Aoba-ku, Yokohama and Machida City, Tokyo.

In-House Scaffolding Materials

We can construct the temporary scaffolding required for exterior renovations using our own scaffolding materials and in-house scaffolding team. By not outsourcing, this leads to cost reductions in scaffolding work. We have 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 a variety of 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. Our company is committed to separating and recycling waste, striving for proper disposal and reduction of 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. Color simulations and tests for heat-insulating paints can also be conducted. The showroom is a 3-minute walk from Eda Station in Aoba-ku, Yokohama, and is accessible from Tokyo as well.

2. Complete in-house construction

A major strength of Kakeru Koumuten Co., Ltd. is our in-house construction system for exterior renovations. By maintaining a consistent system from inquiry to project completion, we manage both costs and quality. A single representative handles everything from the estimate to the completion of the work, ensuring smooth communication without changes in personnel for sales and construction management. We manage everything in-house, from the installation of temporary scaffolding to exterior wall painting and roof renovations, while setting up a construction system tailored to the specifics of interior and equipment work. 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 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 every year, and we send out annual notification DM. 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 you cannot access the roof at high altitudes, 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 repairs for sudden leaks only.

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 regularly implement technical improvement education 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 our customers choose colors and designs for their important building renovations, both exterior and interior, to ensure their 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 “sample board arrangements” to confirm actual color tones.

7-2. Interior Renovation Simulation

We also provide simulations and perspective drawings for interior renovations. Based on your preferred style, such as modern, we can suggest recommended simulations. We create realistic perspectives based on actual floor plans.

8. Solar panel and battery installation work is also available!

As part of renovations for used properties, more customers are introducing solar power systems that come with substantial subsidies. Kakeru Koumuten Co., Ltd. also handles solar power system installations and proposes 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、劣化や損傷が進行し、周囲に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、最終的には大規模な修繕が必要になることもあります。また、空き家は治安の悪化や資産価値の低下を招くこともあるため、早めの対策が重要です。