[Zama City] Renovation of Vacant Houses and Used Properties | Costs, Subsidies, and Case Studies
| Background color for even rows |
Amount: ¥50,000
Available for residents of Aoba-ku, Yokohama
More Information
Details about the subsidy program.
Q: What is the eligibility for the subsidy?
A: Homeowners in Aoba-ku, Yokohama can apply.
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For those considering renovations of used properties and vacant houses in Zama 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 these concerns, Kakeru Koumuten Co., Ltd., which has numerous achievements in Zama 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 Zama City
Zama City is a compact town known for its sunflower fields, spreading across the Sagami River and the Sagamino Plateau. With the Odakyu Line and Sotetsu Line running through, it has good access to the city center and Yokohama, making it a comfortable residential area.
Residential areas developed during the Showa era are now entering a period of generational change, reaching 40 to 50 years of age. This is why the option of “buying a used house and renovating it to suit your lifestyle” is expanding in Zama City.
Flat Residential Areas of Sagamino Plateau
Many residential areas are planned with little elevation difference, making scaffolding and construction easier, but updates to the exterior and water facilities are necessary due to their age.
Residential Areas Along the Odakyu Line in Sagami-Oka
Residential areas such as Sagami-Oka and Sagamino along the Odakyu and Sotetsu lines are in a renewal phase. There is a strong demand to review insulation and seismic resistance to meet current standards.
Considerations for Locations Along the Sagami River
In locations close to the Sagami River, it is recommended to check the hazard map and consider flood prevention measures as necessary.
Be Aware of the “Boundary” of New Earthquake Resistance Standards
The earthquake resistance of used houses varies significantly depending on the construction period. It is important to determine whether it was built before the standard revisions in 1981 and 2000.
This article summarizes the reasons, points of caution, cost estimates, the latest subsidies for 2026, and how to choose contractors from the perspective of Kakeru Koumuten, aimed at helping those considering renovations for used properties and vacant houses in Zama City to avoid “failures.”
The Most Important Thing is “Comparative Estimates”
To avoid failures in renovations, the most crucial step is comparative estimates. First, obtain estimates from at least three companies that operate in Zama City. Our company, Kakeru Koumuten Co., Ltd., also receives numerous 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 utilizing renovated 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 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 less livable as they are. By renovating and updating the facilities and interiors, you can create a comfortable living environment. Additionally, by changing the layout and refreshing the interiors, 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 homes 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 Investment or Business
When purchasing for investment or business purposes, renovations are essential. By transforming into stylish rentals or share houses, you can differentiate 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 purpose and conditions, there may also be subsidies or tax incentives, leading to an increase in people utilizing vacant houses for business.
03Points to Note 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 second-hand properties, the internal structure and condition are often not clear until you actually see them. Choose a contractor that can perform the work thoroughly according to your wishes, the structure of your home, and the surrounding environment, and that also provides aftercare following the construction.
Point 2 Always Check the Condition of the Building
For second-hand properties and vacant houses, it is crucial to check which parts have deteriorated and to what extent beforehand. Since previous occupants have lived there, internal damage is often not apparent without investigation. Conduct a current condition survey before starting construction to identify any hidden deterioration.
Point 3 Review Earthquake Resistance and Insulation Performance
Particularly important in the renovation of second-hand 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. 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 performance.
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, covering 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, as well as systems that allow for deductions on certain construction costs even with personal funds. These can sometimes be used in combination, so 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 Second-Hand Properties
The renovation costs for second-hand properties and vacant houses vary significantly depending on the level 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
| Construction Content | Estimated Cost |
|---|---|
| Roof Repair and Painting | Approximately 200,000 to 800,000 yen |
| Roof Replacement / Roof Overlay (Cover Method) | Approximately 700,000 to 2,500,000 yen |
| Exterior Wall Painting | Approximately 600,000 to 1,500,000 yen |
| Exterior Wall Replacement / Cover 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 Room to Western Room (1 room) | Approximately 200,000 to 600,000 yen |
3. Water-related Equipment
| 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 Maintenance (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 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 Zama City
One way to carry out renovations on used properties and vacant houses cost-effectively is by utilizing the subsidy and grant system. As of 2026, we have summarized the main systems that residents of Zama City may be able to use.
*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 with our company or the respective offices for the latest information before applying. Kakeru Koumuten can assist with confirming the systems and providing necessary documents, but the application process and requirements vary by system.
National Program: Housing Energy Saving 2026 Campaign
The government is implementing multiple subsidy programs 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.
This program succeeds the “Child-Rearing Green Housing Support Project.” As a general rule, it requires renovation work that includes insulation improvements for openings (windows) and the building structure, and it covers eco-friendly housing equipment, child-rearing compatible renovations, disaster prevention improvements, 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 from 1992 to 2016, up to 800,000 yen per unit (400,000 yen for the same). Eligible construction must start after November 28, 2025, and applications are accepted starting June 30, 2026. Reservations must be made by November 16 at the latest, and grant applications must be submitted by December 31 at the latest (early termination if the budget limit is reached). Applications must be made by registered contractors.
This program covers insulation renovations for windows, including the installation of interior windows, replacement of exterior windows, and glass replacement. The subsidy amount is substantial and effective for addressing cold, heat, and condensation issues. It can easily enhance the insulation performance of existing homes.
The subsidy amount varies based on the window construction method, 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 grant applications must be submitted by December 31 at the latest (early termination if the budget limit is reached). Applications must be made by registered contractors.
This program targets the replacement of water heaters with high-efficiency models such as eco-cute, hybrid water heaters, and EneFarm. It is well-suited for existing properties planning to replace their water heaters.
Subsidy amount guidelines: Eco-cute 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 after November 28, 2025, and applications are accepted starting March 31, 2026 (early termination if the budget limit is reached).
Zama City Program
This program supports the earthquake resistance of wooden single-family homes. It is effective for earthquake resistance renovations combined with the purchase of existing homes. The basic subsidy can be utilized by non-local contractors (the additional 200,000 yen for local contractors is limited to those within the city).
The target is wooden structures built using traditional methods before May 31, Heisei 12, with two stories or less. Earthquake renovation work is covered at 1/2, with a maximum of 700,000 yen (for contractors within the city, an additional 200,000 yen for a maximum of 900,000 yen). Earthquake diagnosis and renovation plans are each covered at 1/2, with a maximum of 50,000 yen. Participation in the city’s free earthquake consultation is a prerequisite. Registration for the 8th year of Reiwa requires confirmation. For details, please visit the official page of Zama City.
This is a city program for those looking to install solar power and storage batteries in conjunction with the renovation of used properties. There are no restrictions on contractors being within the city.
Solar power (under 10kW) is 10,000 yen/kW with a maximum of 40,000 yen, and lithium-ion storage batteries are 40,000 yen flat. HEMS, V2H, and Enefarm are not eligible. The budget for the 8th year of Reiwa is 4 million yen and applications are currently being accepted (applications must be made 14 days before construction starts). For details, please visit the official page of Zama City.
Those requiring support or long-term care can utilize housing renovations under long-term care insurance, while individuals with a physical disability certificate of level 1 or 2 can access housing equipment improvement cost subsidies. There are no restrictions on contractors being within the city for the disability-related subsidies.
The housing equipment improvement cost subsidy for persons with disabilities has a maximum of 800,000 yen for housing equipment improvements (1,000,000 yen for mobility lifts, 600,000 yen for environmental control devices, income restrictions apply, and prior application is required). The long-term care insurance housing renovation has a payment limit of 200,000 yen (generally 90% coverage). Both require prior consultation and application before construction starts.
Support for the removal of dangerous block walls facing roads. This can be utilized in conjunction with exterior renovations of used homes. There are no restrictions on contractors being within the city.
Requirements include a height of 60 cm or more from the road surface, a danger assessment on the inspection sheet, application before construction starts, and completion by the end of the fiscal year. Applications will be accepted in order of submission until the budget is reached. Registration for the 8th year of Reiwa requires confirmation. For details, please visit the official page of Zama City.
* The general “Residential Renovation Subsidy System” in Zama City (basic 50,000 yen; 1/2 limit of 300,000 yen for child-rearing households) requires that the work be performed by a contractor based in the city, so our company (Aoba-ku, Yokohama) is not eligible. On the other hand, seismic retrofitting (basic subsidy), solar power, storage batteries, improvements to housing facilities for people with disabilities, and the removal of block walls can be utilized even by contractors outside the city (the additional 200,000 yen for seismic retrofitting is limited to city-based contractors). Insulation and windows are primarily supported by the national “Housing Energy Efficiency 2026 Campaign.”
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 applied based on the year-end balance.
- Renovation Promotion Tax System (Investment-type Tax Reduction): For construction related to seismic retrofitting, energy conservation, barrier-free design, 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 retrofitting, energy conservation renovations, and barrier-free renovations.
- Kanagawa Prefecture Existing Housing Energy Conservation 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 an additional recruitment is scheduled from September 7 to September 30, 2026, available only through electronic application on a first-come, first-served basis (approximately 25 cases). Applications must be made by the applicant themselves, and construction before the grant decision is not eligible. Please check the official Kanagawa Prefecture page.
Subsidies and tax reductions may be combined, but there are restrictions on duplication for the same work. Kakeru Koumuten will organize and propose which systems can be used for your renovation after conducting a 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)!
Exterior Renovation Case Studies in Zama City
| Construction Location | Aoba-ku, Zama City, Kanagawa |
|---|---|
| Construction Details | Roof Overlay Work |
| Existing Roofing Material | Slate |
| New Materials Used | Roofing Material: Nichiha / Yokodana Roof αS |
| Price Range | 600,000 yen – 700,000 yen |
| Completion Month | January 2021 |
Our Proposal
Since you requested highly insulated roofing materials, we proposed a roof overlay work that involves layering new roofing materials without removing the existing slate roof. The new roofing material used is Nichiha’s “Yokodana Roof αS,” which is lightweight and excels in insulation and durability, made from a combination of metal steel plates and rigid urethane foam.
You can also consult us for leak repairs and exterior painting in Zama City.
07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Zama City
There are many renovation companies that serve Zama City, and it can be confusing to decide which one to choose. When requesting renovations, be sure to check the following five points.
- Rich experience in renovation work
- Check for warranties and after-sales maintenance
- Obtain estimates from multiple contractors (at least three)
- Confirm whether they perform renovations in-house
- Check if they offer color simulations and perspective drawings
1. Rich 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 project after hiring, giving you peace of mind. If you have concerns, choose a contractor with extensive 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; consider the construction results, estimates, and warranty details for a comprehensive judgment.
2. Confirm the presence of warranties and aftercare services
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 and paint type, but generally ranges from 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer aftercare services separate from the warranty, 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 and send out annual notification 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 renovations, be sure to obtain estimates from multiple contractors. Even for the same construction work, warranties, aftercare services, and costs can vary significantly. Having multiple estimates makes it easier to negotiate prices.
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.” Lowering the rank of auxiliary parts or skipping processes can reduce costs, so it is crucial to not make judgments based solely on price.
Click here to 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 surveys on the existing “condition,” “location,” “materials,” “desired durability,” and “design” to propose the optimal plan. While there is no inherent problem with the system where partner companies perform the construction, it is essential to confirm whether the contracted company understands the construction details and has clearly defined responsibilities for quality control and guarantees. If we handle the construction ourselves, it is easier to coordinate with the site, allowing for a quicker response in case of any issues.
5. Do they offer color simulations and perspective drawings?
Choosing colors and envisioning the appearance after construction can be challenging for both exterior and interior projects. With simulations, you can reduce the risk of mistakes like “it didn’t turn out as I imagined.” Since it is difficult to redo once construction is completed, it is advisable to choose a company that can accommodate flexible simulations.
08Reasons why Kakeru Koumuten is chosen for remodeling used homes in Zama City
One reason is that “Kakeru Koumuten also serves Zama City,” but
we have unique initiatives in “vacant house and used property remodeling” that cannot be replicated by other companies,
which have received high praise from many customers.
We have absolute confidence in “cost,” “quality,” and “plans” for remodeling in Zama City. Please compare our estimates with those from other companies.
The most important aspect of remodeling is getting multiple estimates. Request estimates from at least three remodeling contractors that serve Zama City!
1. Equipment specialized for in-house remodeling
At Kakeru Koumuten, we have established warehouses and material storage areas to provide remodeling work at low cost and high quality. We have five bases for material storage and showrooms located within Yokohama City.
In-house ownership of 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 cuts on scaffolding work. We have scaffolding materials for approximately 50 houses.
Materials stored 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 together, we separate and recycle waste materials, significantly cutting down on 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 variety of catalogs. You can also confirm heat insulation properties using a heat-resistant 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 its 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 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 as well as permits for industrial waste collection and transportation. We also have nationally certified sheet metal workers and painting specialists, 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 painting and joint sealing work come with a warranty. Aftercare is available annually, and we send out notification DM each year. If you are concerned about the warranty, please click on the image above to check.
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. For leak investigations, we also use a thermal imaging camera. 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 exterior renovations vary in construction methods and materials based on existing materials and shapes, we regularly conduct technical improvement education 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 propose several patterns with our recommended color schemes. We also accommodate “test painting” and “arranging paint boards” to confirm the actual color tones.
7-2. Interior Renovation Simulation
We also support simulations and perspective drawings for interior renovations. Based on your preferred image, such as a modern style, we will propose 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 equipment, which has abundant subsidies, in line with renovations of used properties. Kakeru Koumuten Co., Ltd. also handles solar equipment installation and will propose solar panels that fit 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 Zama City | Frequently Asked Questions
We will answer the most frequently asked questions from those considering renovations of used properties and vacant houses in Zama City.
Is it better to consult before buying or after buying a used property for renovation?
If possible, please consult us before making a purchase decision. Used properties often have deterioration that is not visible, and it is not uncommon to encounter cases where “unexpected construction costs arose” 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 establish a feasible financial plan.
What renovations should be prioritized for a used detached house in Zama City?
It depends on the condition of the building, but we prioritize areas that, if left unattended, could lead to further damage, such as leaks, termites, structure, and seismic resistance. After that, we will decide the order of renovations for roof and exterior walls, water areas (kitchen, bathroom, toilet), and insulation based on your budget and impact on your daily life. In residential areas of the flat Sunflower Town on the Sagamino Plateau, roofs and exterior walls often reach the end of their lifespan first, so we recommend starting with a comprehensive inspection of the building, including the exterior.
I bought a used detached house in Zama City. Can I use subsidies?
Zama City has many flat residential areas on the Sagamino Plateau, making it an easy area for construction. The wooden house seismic retrofitting subsidy (1/2, up to 700,000 yen) can be used even with contractors from outside the city (the additional 200,000 yen for in-city construction is limited to local contractors). It is also expected that solar power, storage batteries, improvements to housing equipment for the disabled, and the removal of block walls can be utilized with contractors from outside the city. We will first propose inspections for exterior, water systems, seismic safety, and insulation.
How much does a full renovation (full remodeling) cost?
The cost of a full renovation for a detached house varies greatly depending on the scope and grade. If focusing on partial renovations, it typically starts from around 5 million yen, while large-scale renovations that include interior and exterior work, water systems, insulation, and seismic upgrades can exceed 10 million to 20 million yen. We will first conduct a site survey to assess the condition and propose a prioritized plan that fits your budget.
Do I need to apply for subsidies myself? Is the process difficult?
The applicant varies depending on the system. For example, the national “Mirai Eco Housing 2026 Project” has a system where registered contractors (construction companies) apply. For seismic retrofitting and housing renovations under long-term care insurance in your municipality, the application is generally made by the homeowner, but we will guide you through the necessary documents and process. We will organize and inform you about “which systems can be used,” so please feel free to consult with us first.
What risks are there if I leave a vacant house as it is?
Risks include the progression of water leaks and termite damage, depreciation of asset value due to deterioration of exterior walls and roofs, and neglect of garden trees and equipment. 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 exemption for residential land from property tax will be revoked. Conducting inspections early 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 seismic safety. How can I assess the seismic 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 if it was built after June 2000 (strengthening of joint and foundation regulations). For wooden detached houses built before that, we recommend a seismic diagnosis. Your municipality also offers subsidies for seismic retrofitting of wooden houses, which can significantly reduce costs if eligible (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?
It depends on the scope of the work. Exterior renovations and partial interior work can often be done while you are living in the house, but for large-scale full renovations that include water systems, we may recommend temporary housing. The estimated duration is about 2 to 4 weeks for exterior work and about 1 to 3 months or more for full renovations. We will provide a schedule in advance and propose a plan that minimizes the impact on your daily life.
Is Zama City within your service area? Are there any travel fees?
Yes, Zama City is within the service area of Kakeru Koumuten Co., Ltd. Our headquarters is located in Aoba-ku, Yokohama, and we primarily serve five locations across Kanagawa Prefecture and Tokyo. Estimates are completely free, and we do not engage in persistent sales tactics. Please feel free to consult with us first.
Leave your renovations in Zama City to Kakeru Koumuten!
“I want my renovation to last a long time with just one go,” “I want to keep costs down as much as possible,” “I want to improve insulation because my home is hot”—we will propose the best solutions to your specific requests. We will not suggest any unnecessary work that prioritizes profit.
We are confident in our costs, quality, and planning, so we welcome competitive estimates. Estimates are completely free.
Get your free estimate or consultation here
If you find our company to be inferior to others, feel free to decline outright.
See Kakeru Koumuten’s construction examples
View construction menu and price list
10Features of Zama City
Zama City is a compact town known for its sunflower fields, spreading across the Sagami River and the Sagamino Plateau. The Odakyu Line and Sotetsu Line run through the area, providing good access to the city center and Yokohama, making it a comfortable residential area.
As single-family residential areas from the Showa era reach a generational transition, the choice of continuing to live in older homes through renovation is becoming established. Kakeru Koumuten, headquartered in Aoba-ku, Yokohama, widely accepts exterior and interior renovations across Kanagawa Prefecture and Tokyo. We can handle everything from exterior wall overlay methods with in-house construction capabilities.
Areas We Serve for Renovations
Kakeru Koumuten accepts requests primarily in Kanagawa Prefecture and Tokyo.
Main Areas Served in Zama City
Zama / Iriya / Sobudai / Sagamigaoka / Hibarigaoka / Midorigaoka / Kurihara / Kurihara Chuo / Tatenodai / Hirono Dais / Higashihara / Nishikurihara / Yotsuya / Nittajuku / Komatsubara / Minamikurihara / Sagamino / Sobudai Mae and all areas of Zama City
・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 services
・Company profile of Kakeru Koumuten Co., Ltd.
・Kakeru Koumuten Co., Ltd. staff blog and announcements
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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！
