[Sagamihara City, Chuo Ward] Vacant House and Used Property Renovation | Costs, Subsidies, and Case Studies
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For those considering renovations of used properties and vacant houses in Chuo Ward
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.
Kakeru Koumuten Co., Ltd., with numerous achievements in Chuo-ku, 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 Chuo-ku
Chuo-ku, Sagamihara City is a central district of the city, home to Sagamihara City Hall, Sagamihara Station, and Fuchinobe Station. It is a livable town where planned residential areas and commercial and industrial zones are well-balanced across the flat Sagamino Plateau.
In the area around Sagamihara Station’s north exit, urban development utilizing part of the returned land from the Sagami General Supply Depot is being considered and promoted, while there are also single-family homes and housing complexes developed during the Showa era within the district. Therefore, in Chuo-ku, there is the option to “buy a used single-family home or condominium and renovate (rehabilitate) it according to your lifestyle.”
Urban Development Around Sagamihara Station
This area is where urban development utilizing part of the returned land from the supply depot is being considered and promoted. Be sure to check future development plans and the surrounding environment.
Flat Residential Areas of Sagamino Plateau
While many residential areas have little elevation difference, construction conditions vary depending on the distance from the main road and neighboring houses. It is also necessary to check the age and deterioration status of each building.
Houses and Condominiums with Years of Construction
In areas like Fuchinobe and Kamimizo, there are residences that have been around for many years. It is important to check the insulation and seismic performance according to the construction period and deterioration status.
Be Aware of the “Boundary” of New Seismic Standards
The seismic resistance of used houses varies greatly depending on the construction period. It is crucial to determine whether it was built before the standard revisions of 1981 and 2000.
This article summarizes the reasons, points of caution, cost averages, the latest subsidies for 2026, and how to choose a contractor from the perspective of Kakeru Koumuten, aimed at helping those considering renovations for used properties and vacant houses in Chuo Ward to avoid “failures.”
The Most Important Thing is “Comparative Estimates”
To avoid failures in renovations, the most important factor is comparative estimates. First, obtain estimates from at least three companies that serve the Chuo Ward area. Our company, Kakeru Koumuten Co., Ltd., also receives many consultations and requests for renovations of vacant houses and used properties.
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 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.” Older 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 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 houses are often evaluated at a low asset value as they are, but renovations can improve their appearance and performance, thereby increasing their value as properties.
Reason 3 To Utilize as Investment or Business
For purchases intended for investment or business, 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 an increase in profitability. Initial costs can be lower than new constructions, and depending on the use and conditions, there may also be subsidies or tax incentives available, 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 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 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 the property has been lived in by someone else, internal damage is often not apparent without investigation. Conduct a current condition survey before starting work to identify 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 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 renovations, and barrier-free modifications. Tax deductions include the “housing loan tax deduction” 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’s essential to check in advance and plan to utilize them strategically for a 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 market rates 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
| Construction Content | Estimated Cost |
|---|---|
| Roof Repair and Painting | Approximately 200,000 to 800,000 yen |
| Roof Replacement / Roof Overlay Method | Approximately 700,000 to 2,500,000 yen |
| Exterior Wall Painting | Approximately 600,000 to 1,500,000 yen |
| Exterior Wall Replacement / Overlay Method | Approximately 1,500,000 to 3,000,000 yen |
2. Interior (Interior Finishing)
| Construction Content | Estimated Cost |
|---|---|
| Floor Replacement (approximately 6 tatami mats, flooring, etc.) | Approximately 100,000 to 300,000 yen |
| Wallpaper Replacement (approximately 6 tatami mats) | Approximately 50,000 to 150,000 yen |
| Ceiling Repair and Painting (approximately 6 tatami mats) | Approximately 30,000 to 100,000 yen |
| Renovation from Japanese-style Room to Western-style Room (1 room) | Approximately 200,000 to 600,000 yen |
3. Water Facilities
| Construction Content | Estimated Cost |
|---|---|
| Kitchen Replacement | Approximately 450,000 to 1,500,000 yen |
| Bathroom Renovation (Unit Bath) | Approximately 600,000 to 1,500,000 yen |
| Toilet Replacement | Approximately 120,000 to 500,000 yen |
| Vanity Replacement | Approximately 80,000 to 300,000 yen |
4. Equipment and Infrastructure
| Construction Content | Estimated Cost |
|---|---|
| Water Heater Replacement | Approximately 100,000 to 500,000 yen |
| Pipe Replacement (Aging Water Pipes, etc. – Partial Work) | Approximately 100,000 to 500,000 yen |
| Electrical Wiring Work (Partial Work) | Approximately 100,000 to 500,000 yen |
| Insulation Renovation (Replacing Multiple Windows, Installing Inner Windows, etc.) | Approximately 200,000 to 1,000,000 yen |
5. Waterproofing and Earthquake Resistance
| Construction Content | Estimated Cost |
|---|---|
| Balcony Waterproofing Work | Approximately 100,000 to 400,000 yen |
| Seismic Reinforcement Work | Approximately 500,000 to 2,000,000 yen |
6. Exterior Works
| Construction Content | Estimated Cost |
|---|---|
| Entrance Door Replacement | Approximately 200,000 to 500,000 yen |
| Gate and Fence Renovation | Approximately 200,000 to 800,000 yen |
| Parking Lot Improvement (for 1 car, including concrete pouring, etc.) | Approximately 200,000 to 600,000 yen |
*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 with 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 Chuo Ward
One way to renovate used properties and vacant houses affordably is to utilize subsidy and grant systems. As of 2026, we have summarized the main systems that residents of Chuo Ward may be able to use.
*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 with our company or each office for the latest information before applying. Kakeru Koumuten can assist with confirming the systems and necessary documents, but the application methods and applicants may 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.
This program is a successor to the “Child-Rearing Green Housing Support Project.” In principle, it requires renovation work that includes insulation improvements for openings (windows) and building structures, targeting eco-friendly housing equipment, child-rearing supportive renovations, disaster prevention enhancements, and barrier-free renovations.
Subsidy upper limit guidelines: For houses built before 1991, up to 1,000,000 yen per unit (50,000 yen depending on the construction content); for houses built between 1992 and 2016, up to 800,000 yen per unit (400,000 yen for the same). Eligible construction must start on or after November 28, 2025, and applications are accepted from June 30, 2026. Reservations must be made by November 16 at the latest, and subsidy applications must be submitted by December 31 at the latest (early termination if the budget limit is reached). Applications must be made through registered contractors.
This program covers window insulation renovations such as installing interior windows, replacing exterior windows, and glass replacements. The subsidy amount is substantial and effective for addressing cold, heat, and condensation issues. It easily enhances the insulation performance of existing homes.
Subsidy amounts vary based on window construction methods, performance, size, and the type of house. If the total subsidy amount for one application is less than 50,000 yen, it is not eligible. Applications are accepted starting March 31, 2026, and subsidy applications must be submitted by December 31 at the latest (early termination if the budget limit is reached). Applications must be made through registered contractors.
This program targets the replacement of water heaters with high-efficiency models such as EcoCute, hybrid water heaters, and EneFarm. It is well-suited for older properties planning to replace their water heaters.
Subsidy amount guidelines: EcoCute 70,000 to 100,000 yen per unit, hybrid water heaters 100,000 to 120,000 yen per unit, EneFarm 170,000 yen per unit. Eligible construction must start on or after November 28, 2025, and applications are accepted starting March 31, 2026 (early termination if the budget limit is reached).
Sagamihara City Program
This program targets renovations for wooden single-family homes that have been assessed as having a “high” or “some” risk of collapse based on earthquake resistance diagnostics. It is effective for earthquake-proofing in conjunction with the purchase of existing homes.
Planning and construction costs are 1/2, with a maximum of 1,150,000 yen. An additional 250,000 yen or 500,000 yen is available for elderly households. Eligible properties are single-family homes built before May 31, 2000. There is also a subsidy for seismic diagnosis costs (maximum 153,000 yen). The application period for fiscal year 8 may vary, so please check for updates. For details, visit the official page of Sagamihara City.
This is a program by Sagamihara City to support the purchase of used homes or renovations of homes owned by parents when living with them for child-rearing households and young households. You can use either the purchase cost subsidy or the renovation cost subsidy.
The renovation cost subsidy is 1/5 of the eligible construction costs, up to 400,000 yen (maximum 800,000 yen for moving from outside the city / maximum 750,000 yen for moving within the city). The work must be done by a contractor within the city, and there are requirements regarding the area, age, household, and a minimum of 5 years of residence. Contracts or construction started before the grant decision are not eligible. The application period is from April 1, 2026, to February 26, 2027 [must arrive by this date], and it may end early if the budget is reached. For details, visit the official page of Sagamihara City.
This is for those who have been certified as requiring support or care. Eligible renovations include handrails, eliminating steps, changing flooring materials, and replacing doors and toilets. Sagamihara City also has its own subsidy for improving housing equipment for the elderly.
The home renovation under long-term care insurance has a maximum subsidy limit of 200,000 yen (generally 90% coverage). The city’s unique subsidy for improving housing equipment for the elderly is available for those over 60 years old and who are exempt from city tax (maximum amount to be confirmed). In both cases, prior consultation and application before construction are required.
This is a city program aimed at those who plan to introduce solar power and storage batteries in conjunction with the renovation of used properties.
Solar power: 80,000 yen, storage battery and V2H: 200,000 yen each, ZEH: 300,000 yen. The storage battery and V2H require interconnection with solar power generation equipment. The first phase is from September 1 to 30, 2026 (for equipment completed between April 1 and September 30, 2026), and the second phase is from February 1 to 26, 2027 (for equipment completed between October 1, 2026, and February 26, 2027), and applications will be made after completion. There are planned numbers for each equipment, so for details, please visit the official page of Sagamihara City.
* For insulation and window work, there may be opportunities to utilize the national “Housing Energy Saving 2026 Campaign” and Kanagawa Prefecture’s existing housing energy-saving renovation subsidies. The eligible work, application periods, and combined conditions vary by system, so please confirm before contracting and starting work.
View information on 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 based on the year-end balance.
- Renovation Promotion Tax System (Investment-type Tax Reduction): For work such as seismic retrofitting, energy saving, barrier-free, and long-term excellent housing, there may be cases where income tax deductions can be received even with personal funds.
- Property Tax Reduction: There is a system that reduces property tax for a certain period for seismic retrofitting, energy-saving renovations, and barrier-free renovations.
- Kanagawa Prefecture’s 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 30, 2026, only electronically and on a first-come, first-served basis (about 25 cases). Applications must be made by the applicant 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 work. Kakeru Koumuten will organize and propose which systems can be used for your work based on an on-site survey.
06Customer Voices
カテゴリ ‘voice’ は見つかりません
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customer reviews
Asao-ku, Kawasaki City | We received reviews about the ridge cap and rain gutter replacement work!
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customer reviews
Kohoku-ku, Yokohama | We received reviews about the roof overlay (cover method)!
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customer reviews
Kohoku-ku, Yokohama | We Received Reviews About Exterior Painting!
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customer reviews
Aoba-ku, Yokohama | We received reviews about our exterior fence construction!
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customer reviews
Tsurumi-ku, Yokohama | We received reviews about roof and exterior wall painting, as well as metalwork and rain gutter replacement work!
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customer reviews
Higashiyamato City, Tokyo | We received reviews about exterior painting and roof overlay (cover method)!
Roof Overlay Construction Case Studies in Chuo-ku
| Construction Location | Chuo-ku, Sagamihara |
|---|---|
| Work Details | Temporary scaffolding installation / roof overlay work |
| Existing Roofing Material | Slate (Colonial NEO) |
| New Materials Used | Ai-G Co., Ltd. / Super Galtect |
| Price Range | 500,000 yen – 600,000 yen |
| Completion Month | February 2024 |
Our Proposal
The existing roofing material was slate (Colonial NEO). Since confirming the strength of the existing substrate is crucial in the roof overlay method, we proposed a cover method that overlays new roofing materials without removing the existing roof after checking its condition during the on-site survey. For the new roofing material, we adopted the lightweight and highly insulated Super Galtect.
07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Chuo-ku
There are many renovation companies that serve Chuo-ku, and it can be confusing to decide which one to choose. When requesting renovations, be sure to check the following five points.
- Having extensive experience in renovation work
- Confirming the presence of guarantees and aftercare services
- Obtaining estimates from multiple contractors (at least 3 companies)
- Checking if the company performs renovations in-house
- Verifying if they offer color simulations and perspective drawings
1. Having extensive experience in renovation work
Many renovation contractors publish their construction achievements 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, giving you peace of mind. If you’re 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 the posts. In particular, Google reviews are useful, but don’t make your decision based solely on reviews; assess the overall situation including construction achievements, estimates, and guarantee details.
2. Confirming the presence of guarantees and aftercare services
When selecting a contractor, be sure to check for the presence of guarantees. If you are within the guarantee period, repairs may be done for free. The duration varies by contractor and paint type, but 1 to 10 years is typical (emergency repairs or partial repairs are often not covered). Some contractors also offer aftercare services separately, so be sure to check for those as well.
Kakeru Koumuten Co., Ltd. provides guarantees for exterior renovations and sealing work. We also conduct aftercare services and send out annual notification DM, making annual inspections possible.
Click here for more details about Kakeru Koumuten’s guarantees and aftercare services
3. Obtaining estimates from multiple contractors (at least 3 companies)
When requesting renovations, be sure to obtain estimates from multiple contractors. Even for the same construction content, guarantees, aftercare services, and prices can vary significantly. Having multiple estimates makes it easier to negotiate prices.
When comparing estimates, it’s important to look closely at not only the cost but also the “items in the estimate,” “confirmation of undercoating materials, sealing materials, and auxiliary paint,” and “confirmation of the process.” Lowering the rank of auxiliary parts or skipping steps can reduce costs, so it’s essential to not make judgments based solely on price.
Learn more about the points to compare in competitive estimates
4. Confirm whether the company performs renovations in-house
Kakeru Koumuten Co., Ltd. conducts 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 construction details and has clear responsibilities for quality control and guarantees. If the work is done in-house, it becomes easier to coordinate with the site and respond quickly in case of any troubles.
5. Check if they offer color simulations and perspective drawings
Choosing colors and visualizing the image after construction can be challenging for both exterior and interior work. Having simulations 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 recommended to choose a company that can provide flexible simulations.
08Reasons why Kakeru Koumuten is chosen for renovations of used houses in Chuo-ku
One reason is that “Kakeru Koumuten also serves Chuo-ku,” but
we have initiatives in the renovation of vacant houses and used properties that cannot be imitated by other companies
which has received high praise from many customers.
We have absolute confidence in “cost,” “quality,” and “plans” for renovations in Chuo-ku. Please compare with estimates from other companies.
The most important aspect of renovation is comparing estimates. Request estimates from at least 3 companies that operate in Chuo-ku!
1. Equipment Specialized for In-House Renovation
At Kakeru Koumuten Co., Ltd., we have organized warehouses and material storage areas to provide high-quality renovations at low cost. We have established 5 bases, including our Machida branch in Tokyo, centered in Aoba-ku, Yokohama.
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, we can achieve cost reductions 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 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, such as compressors and cleaning machines.
In-House Waste Separation
In exterior remodeling, 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 Remodeling 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 simulations and heat-resistant paint testing equipment. 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 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 remodeling. Since one representative handles everything from the estimate to project completion, there is no change in the person responsible for sales and construction management, allowing for smooth communication. From temporary scaffolding setup to exterior wall painting and roof remodeling, all work is performed by our own skilled craftsmen. We are confident in our plans and costs, so we welcome competitive estimates.
3. Various Permits and 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. Even if you cannot access the roof at high places, we can respond using a drone. We also use a thermal imaging camera for leak investigations. We respond according to customer requests and also accept 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 implement technical improvement 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!
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 from actual photos of your building and propose several patterns with our recommended color schemes. We also accommodate requests for “test painting” and “arranging paint boards” 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 from actual floor plans.
8. Solar Panel and Storage Battery Installation Work Also Available!
With the increase in renovations of used properties, more customers are introducing solar power systems that come with generous subsidies. 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 Chuo Ward | Frequently Asked Questions
We answer the most frequently asked questions from those considering renovations of used properties and vacant houses in Chuo Ward.
Is it better to consult before buying a used property or after purchasing it for renovation?
We recommend that you consult with us before making a purchase decision. Used properties often have deterioration that is not visible, and it is not uncommon to encounter unexpected renovation costs 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 create a feasible financial plan.
What should be the priority for renovations in a used detached house in Chuo Ward?
Depending on the condition of the building, we prioritize areas that, if left unattended, could lead to further damage, such as leaks, termites, structural issues, and earthquake resistance. After that, we will determine the order of priority for exteriors such as roofs and walls, water areas (kitchen, bathroom, toilet), and insulation, based on your budget and the impact on your daily life. In residential areas of the Sagamino Plateau centered around Sagamihara Station and Fuchinobe, roofs and walls often reach the end of their lifespan first, so we recommend starting with a comprehensive inspection of the entire building, including the exterior.
I bought a used detached house in Chuo-ku. What should I look at first?
While Chuo-ku has many flat residential areas on the Sagamino Plateau, construction conditions vary depending on the distance from the road and neighboring houses. For older detached houses and housing complexes, we recommend starting with inspections of exteriors such as roofs and walls, water areas, and earthquake resistance/insulation. For buildings constructed before the 1981 and 2000 seismic standards revisions, consider an earthquake diagnosis. Check for assistance programs for seismic renovations of wooden houses in Sagamihara City, and if applicable, subsidies for purchasing or renovating used houses for families with children.
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 quality. If focusing on partial renovations, it starts from around 5 million yen, while large-scale renovations that include interior and exterior work, water areas, insulation, and earthquake resistance can exceed 10 million to 20 million yen. First, we will conduct a site survey to assess the condition and propose a prioritized plan that fits your budget.
Do I apply for subsidies myself? Is the process difficult?
The applicant varies depending on the program. For example, the national “Mirai Eco Housing 2026 Project” is structured so that registered contractors (construction companies) apply. For seismic renovations and home modifications under nursing care insurance in your municipality, the application is generally made by the individual, but we will guide you through the necessary documents and process. We will organize and inform you about “which programs are available,” so please feel free to consult with us first.
What risks are there if I leave a vacant house unattended?
Leaving a vacant house unattended can lead to issues such as worsening leaks and termite damage, deterioration of the exterior walls and roof, and neglect of garden trees and equipment, which can decrease asset value. 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 tax exemption for residential land will be revoked. Conducting an early inspection and performing necessary work according to your plans to live in, rent, sell, or utilize the property can ultimately help reduce costs.
I am worried about earthquake resistance. How can I assess the earthquake resistance of a used detached house?
The construction period is a significant indicator. Check if it was built after June 1981 (new seismic standards), and further check if it was built after June 2000 (strengthening of joint and foundation regulations). For wooden detached houses built before these dates, we recommend an earthquake diagnosis. There are also subsidies for seismic renovations of wooden houses in your municipality, which can significantly reduce costs if you qualify (for details, see the subsidy section above). Kakeru Koumuten Co., Ltd. will assist you from diagnosis to renovation.
Will I need temporary housing during construction? How long will it take?
The scope of work depends on the project. For exterior renovations and partial interior work, it is often possible to carry out the work while you remain in your home. However, for large-scale full renovations that include water-related areas, we may recommend temporary housing. The estimated duration is about 2 to 4 weeks for exterior work and approximately 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 Chuo-ku within your service area? Will there be a travel fee?
Yes, Chuo-ku is within the service area of Kakeru Koumuten. We have five bases, including our Machida store in Tokyo, centered around Aoba-ku, Yokohama, and we cover a wide range of areas in Kanagawa and Tokyo. The availability of services may vary depending on the type of work and location, so please consult with us first. Estimates are completely free, and we do not engage in aggressive sales tactics.
Leave your renovations in Chuo-ku to Kakeru Koumuten!
“I want my renovation to last a long time with just one project,” “I want to keep costs as low as possible,” “I want to improve insulation because my home gets hot” — we will propose the best solutions for your specific requests. We do not suggest unnecessary work that prioritizes profit.
We are confident in our costs, quality, and planning, so we welcome competitive estimates. Our estimates are completely free.
Get your free estimate and consultation here
If you find our company to be inferior to others, feel free to decline.
View Kakeru Koumuten’s case studies
View our service menu and price list
10Features of Chuo-ku
Chuo-ku in Sagamihara City is a central district that includes the Sagamihara City Hall and Sagamihara and Fuchinobe stations. It is a livable town where planned residential areas, commerce, and industry are well-balanced across the flat Sagamino Plateau.
In the area around Sagamihara Station’s north exit, urban development utilizing part of the returned land from the Sagami General Supply Depot is being considered and promoted. The district also has older single-family homes and apartment complexes. Kakeru Koumuten is headquartered in Aoba-ku, Yokohama, and offers a wide range of exterior and interior renovations in Sagamihara City. We can perform in-house construction even for exterior wall overlay methods.
Areas We Can Serve for Renovations
Kakeru Koumuten accepts requests from a wide range of areas in Kanagawa and Tokyo. The availability of services may vary depending on the type of work and location, so please contact us in advance.
Service Area in Sagamihara City Chuo-ku (Main Areas)
Chuo / Fujimi / Hoshigaoka / Seishin / Koyama / Yokoyama / Aioi / Yabe / Fuchinobe / Fuchinobe Honmachi / Kanuma-dai / Kyowa / Kamiyabe / Higashi Fuchinobe / Tana / Suigo Tana / Kamimizo / Shimomizo / Miyashita / Koyo-cho / Chiyoda / Namiki / Hikarigaoka / Midorigaoka and other areas throughout Chuo-ku
・Exterior renovations in Aoba-ku, Sagamihara
・Exterior wall painting in Aoba-ku, Sagamihara
・Roof renovations in Aoba-ku, Sagamihara
・Leak repair in Aoba-ku, Sagamihara
・Waterproofing work in Aoba-ku, Sagamihara
・Check out Kakeru Koumuten’s renovation case studies here!
・Kakeru Koumuten Co., Ltd. construction menu and price list
・Reasons why Kakeru Koumuten is chosen!
・About Kakeru Koumuten’s guarantees and aftercare
・Company profile of Kakeru Koumuten Co., Ltd.
・Staff blog and announcements of Kakeru Koumuten Co., Ltd.
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株式会社翔工務店へ
株式会社翔工務店は平均年齢２０代後半の若い会社ですが、技術はどこにも負けていません。
いちばんの強みは、足場工事、屋根工事、塗装工事とすべて自社で行えること。一般には分業されるこの業界にあって、一式で頼めるので管理に手間がかからず、コストも抑えることが出来ます。何より、トラブルがあればすぐにかけつけます！
自信をもって、宣言できます。私たちは、神奈川で一番若くて親切なリフォーム屋です！
