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

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

I bought a used property, but I’m unsure 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 available.

For such concerns, Kakeru Koumuten Co., Ltd., which has numerous achievements in Mitaka City, will clearly explain the key points for a successful renovation.

Get at least 3 estimates!

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

Mitaka City in Tokyo is blessed with greenery from Inokashira Park and the Tamagawa Josui, featuring a good residential area along the Chuo Line and Keio Inokashira Line. Known for the Ghibli Museum, it offers a culturally rich and tranquil living environment.

Wooden houses developed during the Showa era are now entering a period of generational change, reaching 40 to 50 years old. This is why the option of “buying a used house and renovating it to suit your lifestyle” is expanding in Mitaka City.

02Reasons for Renovating Vacant Houses and Used Properties

In recent years, the housing market in Japan 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 homes. 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.” Older homes often have issues with the roof, exterior walls, and plumbing, making them difficult to live in as they are. By renovating and updating the facilities and interiors, you can create a comfortable living environment. Additionally, through changes in layout and refreshing the interior, you can finish your home to suit 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 homes are often valued low in their current state, but renovations can enhance both appearance and performance, thereby increasing the property’s value.

Reason 3 To Utilize as an Investment or Business

For purchases made for investment or business purposes, renovations are essential. By transforming a property into a highly designed rental or share house, you can differentiate it from other properties, and depending on the location and planning, you can also expect improved profitability. Initial costs can be lower than new construction, and depending on the use and conditions, there may also be subsidies or tax incentives available, 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 select a contractor you can trust to handle your 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 perform 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 beforehand. Since the property has been occupied 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 homes built before that may not meet current standards. Additionally, 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, and part of the costs for earthquake retrofitting, energy-saving renovations, and barrier-free modifications may be supported. 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 crucial to check in advance and use them strategically to ensure a successful renovation (for the latest information, see this subsidy section).

04Cost Estimates for Renovating Vacant Houses and Used Properties

The cost of renovating used properties and vacant houses varies significantly based 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 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 Equipment

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 of rooftops and updates to the plumbing and wiring of the entire house may exceed the above estimates depending on the area and method used. 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 Mitaka City

* The following information is as of September 3, 2026. The details, 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 the respective offices before applying. Kakeru Koumuten can assist with confirming the systems and providing 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

Mitaka City Programs

06Customer Voices

Roof Replacement Project Examples in Mitaka City

07How to Choose a Remodeling Contractor for Used Properties and Vacant Houses in Mitaka City

There are many remodeling companies that serve Mitaka City, and it can be confusing to decide which one to choose. When requesting a remodel, be sure to check the following 5 points.

1. Experience in Remodeling Work

Many remodeling contractors publish their project 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 have concerns, 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 a decision based solely on reviews; evaluate them alongside project achievements, estimates, and warranty details for a comprehensive judgment.

2. Check for Warranties and Aftercare Services

When choosing a contractor, be sure to check for warranties. Repairs may be covered for free within the warranty period. 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 in addition to warranties, so be sure to check for those as well.

Kakeru Koumuten Co., Ltd. provides warranties for exterior remodeling 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 companies)

When requesting a renovation, be sure to obtain estimates from multiple contractors. Even for the same construction work, warranties, after-sales services, and prices can vary significantly. Having multiple estimates makes it easier to negotiate prices.

When comparing estimates, not only the costs but also the “items in the estimate,” “confirmation of undercoating materials, sealing materials, and additional paint,” and “confirmation of the process” should be carefully compared. Lowering the rank of additional components or skipping processes can reduce costs, so it is important to not make judgments based solely on price.
See detailed points for comparing estimates

4. Check if the company performs renovations in-house

At Kakeru Koumuten, 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 contracted company understands the construction details and has clear responsibilities for quality control and warranties. If the work is done in-house, it becomes easier to coordinate with the site, allowing for quick responses in case of any issues.

5. Check if they offer color simulations and perspective drawings

Whether for exteriors or interiors, deciding on the image and colors after construction can be challenging. 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 work 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 Mitaka City

One reason is that “Kakeru Koumuten also serves Mitaka City,” but
our unique approach to “renovations of vacant houses and used properties” that cannot be replicated by other companies
has received high praise from many customers.

1. Equipment Specialized for In-House Renovations

At Kakeru Koumuten Co., Ltd., we have organized our warehouses and material storage areas to provide high-quality renovations at low cost. We have 5 bases centered around Aoba-ku, Yokohama for our material storage and showroom.

In-House Scaffolding Materials

We can construct temporary scaffolding, which is essential for exterior renovations, using our own scaffolding materials and in-house scaffolding team. By not outsourcing, we can cut costs on scaffolding work. We have scaffolding materials for approximately 50 detached houses.

Storage of Materials 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 available to handle 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 significantly reduces waste disposal costs by sorting 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 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, and is accessible from Tokyo.

2. Complete In-House Construction

A major strength of Kakeru Koumuten 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. Since one representative handles everything from the estimate to the completion of the work, there is no change in the person responsible for sales and construction management, allowing for smooth communication. All work, from temporary scaffolding installation to exterior wall painting and roof renovations, is carried out by our own craftsmen. We are confident in our plans and costs, so we welcome competitive estimates.

3. Various Permits Obtained & Skilled Workers on Staff

We have obtained licenses for construction work and industrial waste collection and transportation. 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 annually, and we send out notification DM each year. 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 climbing to the roof is not possible, we can respond using a drone. For leak investigations, we also use a thermal imaging camera. We respond according to our customers’ wishes and can also provide emergency measures for sudden leaks from exterior walls.

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 training 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 Co., Ltd. is dedicated to helping our customers choose colors and designs for both exterior and interior renovations, ensuring satisfaction with their important buildings.

7-1. Exterior Renovation Simulation

We offer color simulations for exterior wall painting, as well as simulations for metal siding and roof overlays. We can create simulations based on actual photos of your building and propose several color patterns using our recommended color schemes. We also accommodate requests for “test painting” and “paint board arrangements” to check the 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 the actual floor plan.

8. Solar Panel and Storage Battery Installation Work Available!

More customers are introducing solar power systems, which have substantial subsidies, in conjunction with renovations of used properties. Kakeru Koumuten Co., Ltd. also handles solar power installation work and can 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 Mitaka City | Frequently Asked Questions

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

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

10Features of Mitaka City

Mitaka City in Tokyo is blessed with greenery from Inokashira Park and the Tamagawa Josui, featuring a pleasant residential area along the Chuo Line and Keio Inokashira Line. It is also known for the Ghibli Museum, making it an attractive cultural and tranquil living environment.

Wooden single-family homes developed during the Showa era are now reaching a generational transition, and the choice to continue living in them through renovation and resale has taken root. Kakeru Koumuten is headquartered in Aoba-ku, Yokohama, and we handle exterior and interior renovations across a wide area in Kanagawa and Tokyo. We can perform all work in-house, including wall covering methods.

Areas We Can Serve for Renovations

Kakeru Koumuten accepts requests across a wide area in Kanagawa and Tokyo.

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