[Odawara City] Renovation of Vacant Houses and Used Properties | Costs, Subsidies, and Case Studies
For those considering renovation of used properties and vacant houses in Odawara City
I bought a used property, but I’m not sure if the renovation estimate I received is reasonable.
This is my first full renovation, and I’m worried about making mistakes.
I want to make the most of subsidies and grants.
For such concerns, Kakeru Koumuten Co., Ltd., which has numerous achievements in Odawara City, will clearly explain the key points for a successful renovation.
Be sure to obtain estimates from at least 3 companies!
01Reasons for the Increase in Renovations of Used Properties and Vacant Houses in Odawara City
Odawara City is a central city in the western part of Kanagawa Prefecture that flourished as a castle town of Odawara Castle, featuring a diverse landscape from the coastal area facing Sagami Bay to the foothills of Hakone and Tanzawa. It is well-connected to the city center via the Tōkaidō Shinkansen, Odakyu Line, and Tōkaidō Line.
In the old wooden houses of the city center and residential areas developed during the Showa era in the suburbs, it is important to check the earthquake resistance, insulation, and salt damage preparedness according to the age and location of the buildings. One option is to “purchase a used detached house and renovate (rehabilitate) it to suit your lifestyle.”
Wooden Houses in the Castle Town’s City Center
In older wooden houses in the old town, it is possible to continue living while confirming the state of earthquake resistance, fire prevention, and exterior conditions, and making necessary renovations.
Considerations for Salt Damage Along Sagami Bay
In areas close to the sea, it is necessary to consider rust on metal parts caused by sea breezes. Exterior renovations using rust-resistant and weather-resistant materials are effective.
Slopes of Hakone and Tanzawa Mountains
In the western and northern foothills, there are residential areas with elevation differences, requiring checks on retaining walls, slopes, and drainage, as well as ingenuity in scaffolding and transportation.
Be Cautious 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 averages, the latest subsidies for 2026, and how to choose contractors from the perspective of Kakeru Koumuten, aimed at helping those considering renovating used properties or vacant houses in Odawara City “avoid mistakes”.
The Most Important Thing is “Comparative Estimates”
To avoid mistakes in renovations, the most crucial aspect is comparative estimates. First, obtain estimates from at least three companies that operate in Odawara City. 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 utilizing renovated used properties. There is a growing interest in living in renovated or refurbished used houses. Here, we explain the typical reasons for renovating vacant houses and used properties.
Reason 1 To Live Comfortably as Your Own Home
The most common reason for purchasing and renovating a used property is “to live comfortably.” Older houses often have issues with the roof, exterior walls, and plumbing, making them less livable as they are. By renovating and upgrading the facilities and interior, you can create a comfortable living environment. Additionally, by changing the layout and refreshing the interior, you can finish a home that suits your family’s lifestyle while keeping costs lower than new construction.
Reason 2 To Increase Asset Value for Sale
More people are purchasing and renovating used properties with the intention of selling them. Used houses are often valued low as they are, but renovations can improve their appearance and performance, 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 them into stylish rentals or share houses, you can differentiate them from other properties, and depending on the location and planning, you can also expect improved profitability. Initial costs can be lower than new constructions, and depending on the purpose and conditions, they may qualify for subsidies or tax incentives, 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 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 carry out the work properly according to your wishes, the structure of the house, and the surrounding environment, and who also provides aftercare following the construction.
Point 2 Always Check the Condition of the Building
For used properties and vacant houses, it is crucial to check which parts have deteriorated and to what extent beforehand. Since the property has been occupied 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 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. Before starting work, check the condition of the building 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, and part of the costs for earthquake retrofitting, energy-saving construction, and barrier-free renovations may be supported. Tax deductions include the “housing loan tax deduction” when using a mortgage, and there are systems where part of the costs can be deducted for certain works 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).
04Cost Estimates for Renovating Vacant Houses and Used Properties
The renovation costs for used properties and vacant houses vary significantly based on the extent of damage and the scope of work. First, please understand the approximate costs by area to use as a guideline for your financial planning (the table below provides general estimates for single-family homes. The interior is based on one 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 / Overlay (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 Development (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 of 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 with a free on-site survey and estimate.
Please check the construction menu and price list for more details!
05[Latest 2026] Subsidies and Grants Available in Odawara City
One way to renovate 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 Odawara City may be able to use.
*The following information is as of September 3, 2026. The content, duration, and budget of the systems change every fiscal year, and many will end once the budget limit is reached. Please check the latest information at the official contact points for each system before applying. Kakeru Koumuten can assist with confirming the systems and providing necessary documents, but the applicant and application method may vary depending on the 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.
This is a successor program to the “Child-Rearing Green Housing Support Project.” For compliance with next-generation energy-saving standards, insulation renovations for openings and structures are required, and for compliance with mandatory standards, specific eco housing equipment installation must be added. If the requirements are met, eco housing equipment, child-rearing support renovations, disaster prevention improvements, and barrier-free renovations may also be eligible for subsidies.
Subsidy limits: For buildings constructed before 1991, up to 1,000,000 yen per unit (50,000 yen depending on the construction content); for buildings constructed 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 will be 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 may occur if the budget limit is reached). Applications must be made through registered contractors. For more details, visit the official page of the Mirai Eco Housing 2026 Project.
This project covers window insulation renovations such as installing interior windows, replacing exterior windows, and glass replacements. The subsidy amount is significant and effective for countering cold, heat, and condensation. It can easily enhance the insulation performance of existing homes.
The subsidy amount varies depending on the window method, performance, size, and the construction of the house. If the total subsidy amount for one application is less than 50,000 yen, it will not be eligible. Applications have been accepted since March 31, 2026, and grant applications must be submitted by December 31 at the latest (early termination may occur if the budget limit is reached). Applications must be made through registered contractors. For more details, visit the official page of the Advanced Window Renovation 2026 Project.
This project targets the replacement of high-efficiency water heaters such as EcoCute, hybrid water heaters, and EneFarm. It is a suitable program for existing properties planning to replace their water heaters.
Estimated subsidy amounts: 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 will be accepted starting March 31, 2026 (early termination may occur if the budget limit is reached). For more details, visit the official page of the Water Heating Energy Saving 2026 Project.
Odawara City Programs
A key program supporting the earthquake resistance of wooden houses built under the old earthquake resistance standards. It is effective for earthquake renovations combined with the purchase of used detached houses. Diagnosis and design are also eligible for subsidies.
Eligible properties are wooden houses that received construction confirmation before May 31, 1981 (generally 2 stories or less, earthquake resistance score below 1.0, etc.). Earthquake diagnosis for owners residing in the property is 10/10, with a maximum of 90,000 yen; design and construction management is 2/3, with a maximum of 150,000 yen; renovation work is 1/2 (households requiring consideration: up to 1,150,000 yen; others: 850,000 yen). The subsidy for the demolition of wooden houses for fiscal year 2026 will end on August 31, 2026. For more details, visit the official page of Odawara City.
This city program is for those looking to introduce solar power, storage batteries, and Ene-Farm in conjunction with the renovation of used properties.
Guideline: Self-consumption solar power (owned) is 70,000 yen/kW, and storage batteries installed as ancillary equipment to the same system are eligible for 1/3 of eligible expenses (up to 51,600 yen/kWh). In a separate residential equipment subsidy, storage batteries are 50,000 yen/item, ZEH is 100,000 yen/item, Ene-Farm is 30,000 yen/item, and V2H/EV are each 50,000 yen/item. Since the application status, eligible equipment, and combined conditions vary by menu, please confirm before starting construction. For more details, visit the official page of Odawara City.
This is for individuals who have received support or nursing care certification. Eligible works include the installation of handrails, elimination of steps, flooring changes, and replacement of doors and toilets. There is also a unique city program for those with disabilities called “Subsidy for Housing Equipment Improvements.”
Home modifications covered by long-term care insurance have a cost limit of 200,000 yen, with 70%, 80%, or 90% coverage depending on income. Housing equipment improvement grants are available for those with a physical disability certificate of level 1 or 2, with a cost limit of 800,000 yen and a general 1/3 personal burden (no personal burden for households exempt from resident tax). If you are eligible for long-term care insurance benefits, that will take priority. Both require prior consultation and application before construction begins. For details, please check the Long-term Care Insurance Home Modification Costs and Housing Equipment Improvement Grants on the Odawara City website.
Support for the removal of dangerous block walls facing roads and school routes. Can be used in conjunction with exterior renovations of used houses.
10,000 yen per meter (maximum amount 100,000 yen; if the estimate is lower, that amount applies). All walls over 1 meter in height must be completely removed, and any new construction after removal must be 40 cm or lower, with prior application required. From May 11, 2026, to November 27, 2026; first-come, first-served (may end early if budget is reached). For details, please visit the official page of Odawara City.
This program requires contracting with a renovation contractor located within the city, so our company in Aoba-ku, Yokohama, is not eligible. We provide this information for your reference.
Requirements include a pre-tax construction cost of 200,000 yen or more, residency within the city, no delinquency on city taxes, cannot be used in conjunction with other public subsidies, and prior application before construction begins. For the 2026 fiscal year, applications will be accepted from June 15, 2026, to October 30, 2026, with a limit of 65 applications (lottery if exceeded). Contracting with a local contractor is mandatory, so our services as an out-of-town contractor cannot be utilized. For details, please visit the official page of Odawara City.
* The “Regional Economic Circulation Type Housing Renovation Support Project” in Odawara City is only available to contractors within the city, so our company (Aoba-ku, Yokohama) cannot utilize it. Other systems have different conditions regarding eligibility, target equipment, contractors, and application periods. Please confirm with the relevant authorities before signing a contract or starting construction, including whether work by out-of-town contractors is eligible. For insulation and window renovations, there may be possibilities to utilize the national “Housing Energy Saving 2026 Campaign” and Kanagawa Prefecture’s existing housing energy-saving renovation subsidies.
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 involving seismic resistance, energy saving, 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 renovations, 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 scheduled to be accepted from September 7 to September 30, 2026, only via electronic application on a first-come, first-served basis (approximately 25 cases). Applications must be submitted by the applicant themselves, and construction before the grant decision is not eligible. Please check the official Kanagawa Prefecture page.
While subsidies and tax reductions can sometimes be combined, there are restrictions on overlapping for the same construction. Kakeru Koumuten will organize and propose which systems can be used for your construction based on an on-site survey.
06Customer Feedback
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 Odawara City
| Construction Location | Odawara City, Kanagawa Prefecture |
|---|---|
| Construction Details | Temporary scaffolding installation / Roof overlay construction |
| Existing Roofing Material | Slate (contains asbestos) |
| New Materials Used | Roofing material: Aijii Industry / Super Galtect |
| Price Range | 600,000 yen – 700,000 yen |
| Completion Month | November 2023 |
Our Proposal
Since the existing slate roof contained asbestos, we proposed a roof overlay construction method that minimizes the area of roofing material removal. After confirming the condition of the existing roof, we will overlay it with a waterproof sheet and new roofing material. For the new roofing material, we have adopted the lightweight, insulation-integrated metal roofing material Aijii Industry / Super Galtect.
07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Odawara City
There are many renovation companies that serve Odawara 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 project results on their websites. If a contractor provides detailed explanations of the process with photos, it can help you visualize the outcome after your request, 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 your 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, but typically ranges from 1 to 10 years (emergency repairs and 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 warranties tailored to the construction details and materials used. We also conduct aftercare maintenance and send out annual reminder DM, making annual inspections possible.
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 prices can vary significantly. Having multiple estimates makes it easier to negotiate prices.
When comparing estimates, it is important to look at not just the costs, but also the “items in the estimate,” “check the undercoat materials, sealing materials, and paint for additional parts,” and “confirm the process” in detail. Lowering the rank of additional parts or skipping processes can reduce costs, so it is crucial to not judge solely based on price.
Click here for detailed points on comparing estimates
4. Confirm whether the company conducts renovations in-house
Kakeru Koumuten Co., Ltd. conducts detailed hearings and surveys on the existing “condition,” “location,” “materials,” “desired durability,” and “design” to propose the optimal plan. While there is nothing inherently wrong with the system of subcontractors performing the work, it is important to confirm whether the contracted company understands the scope of work and has clearly defined responsibilities for quality control and guarantees. If the work is done in-house, it becomes easier to coordinate with the site, allowing for quick responses in case of any troubles.
5. Do they offer color simulations and perspective drawings?
Choosing colors and envisioning the look after construction can be challenging for both exterior and interior projects. 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 recommended to choose a company that can accommodate flexible simulations.
08Reasons why Kakeru Koumuten is chosen for remodeling used houses in Odawara City
One reason is that “Kakeru Koumuten also serves Odawara City,” but
“our unique approach to vacant houses and used property remodeling that cannot be imitated by other companies”
has received high praise from many customers.
We have absolute confidence in “cost,” “quality,” and “plans” for remodeling in Odawara City. Please compare our estimates with those of other companies.
The most important aspect of remodeling is getting multiple estimates. Request estimates from at least three remodeling contractors that serve Odawara City!
1. Equipment specialized for in-house remodeling
Kakeru Koumuten has established warehouses and material storage areas to provide high-quality remodeling at low costs. We have five bases, including material storage and showrooms, in Aoba-ku, Yokohama, and Machida City, Tokyo.
In-house ownership of scaffolding materials
For exterior renovations, temporary scaffolding is essential, and we can construct it using our own scaffolding materials and in-house scaffolding team. By not outsourcing, this leads to cost cuts on scaffolding work. We own scaffolding materials for approximately 50 single-family homes.
Materials stored in our large 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.
Showroom dedicated to exterior renovations
In our showroom, you can not only have meetings but also check the actual paint colors and a wide variety of catalogs. You can also confirm thermal insulation properties using a thermal insulation paint testing machine and color simulation. The showroom is a 3-minute walk from Eda Station in Aoba-ku, Yokohama.
2. Complete In-House Construction
A major strength of Kakeru Koumuten Co., Ltd. is our complete in-house construction. By maintaining a consistent system from inquiry to project completion, we can keep costs down while providing high-quality renovations. A single representative handles everything from the estimate to project completion, ensuring smooth communication without changes in sales or construction management. All work, from temporary scaffolding installation to exterior wall painting and roof renovations, is carried out by our own skilled craftsmen. We are confident in our plans and costs, so we welcome competitive estimates.
3. Various Permits and Skilled Workers
We have obtained construction industry licenses and permits for industrial waste collection and transportation. We also have nationally certified sheet metal workers and painting technicians, ensuring confidence in our construction techniques. We are capable of handling large-scale painting projects for factories and apartment complexes.
4. Warranty and Aftercare Maintenance
Exterior painting and joint sealing work come with a warranty. Aftercare is available every year, and we send out annual notification DM. 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 differ in construction methods and materials based on existing materials and shapes, we regularly conduct technical improvement education so that each staff member can respond to 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 combinations. 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 style, such as modern, 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 with abundant subsidies in line with renovations of used properties. Kakeru Koumuten Co., Ltd. also handles solar equipment installation and will 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 Odawara City | Frequently Asked Questions
We will answer the most frequently asked questions from those considering renovations of used properties and vacant houses in Odawara City.
Is it better to renovate after buying a used property or consult before buying?
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 Co., Ltd. check the condition of the property you are considering in advance and provide an estimate for necessary renovations, you can establish a feasible financial plan.
For a used detached house in Odawara City, what renovations should be prioritized first?
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, and structural or seismic issues. 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 the castle town’s urban area and residential areas near Sagami Bay and the Hakone foothills, the roof 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.
Odawara City is close to the sea; what should be noted about used detached houses?
In areas facing Sagami Bay, it is important to consider rust on metal parts due to sea breezes (salt damage) when planning exterior renovations. Choosing materials that are resistant to rust and weather is key. For wooden houses in the old town of the castle town, it is recommended to check for seismic resistance, fire prevention, and exterior condition. In the sloped areas at the foot of Hakone and Tanzawa, it is advisable to confirm retaining walls and drainage. We also offer cost-effective proposals that include the Odawara City wooden house seismic renovation subsidy (50% of renovation costs, with a maximum of 1.15 million yen for households requiring special consideration) as well as national and prefectural energy-saving subsidies.
How much does a full renovation (full renovation) cost?
The cost of a full renovation for a detached house varies significantly 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 areas, 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” requires registered contractors (construction companies) to apply. For seismic renovations or housing modifications under long-term care insurance in your city or ward, 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 systems are available,” so please feel free to consult with us first.
What risks are there if I leave a vacant house as it is?
Leaving a vacant house can lead to issues such as the progression of leaks and termite damage, deterioration of the exterior and roof leading to a decrease in asset value, 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 tax exemption for residential land will be revoked. Early inspections and necessary renovations based on your plans to live in, rent, sell, or utilize the property can ultimately help reduce costs.
I am concerned about seismic resistance. How can I assess the seismic safety of a used detached house?
The construction date is a significant indicator. Check if it was built after June 1981 (new seismic standards), and further confirm if it was built after June 2000 (strengthening of joint and foundation regulations). For wooden houses built before that, we recommend a seismic assessment. Your city or ward also offers subsidies for seismic renovations 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?
This depends on the scope of the work. Exterior renovations and partial interior work can often be done while you remain in your home, but for large-scale full renovations that include water areas, 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 you with a schedule in advance and propose a plan that minimizes the impact on your daily life.
Is Odawara City within your service area? Will there be travel costs?
Yes, Odawara City is within the service area of Kakeru Koumuten Co., Ltd. We have five bases, including our headquarters in Aoba-ku, Yokohama, and Machida City, Tokyo, primarily serving Kanagawa Prefecture and Tokyo. The availability of our services may vary depending on the region and the type of work, but estimates are completely free. Please feel free to consult with us first.
Leave your renovations in Odawara City to Kakeru Koumuten!
“I want my renovation to last a long time with just one project,” “I want to keep costs down as much as possible,” “I want to improve insulation because my indoor space is hot” — we will propose the best solutions for your specific requests. We do not suggest any unnecessary work focused on profit.
We are confident in our costs, quality, and planning, which is why 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.
View Kakeru Koumuten’s project examples
View our service menu and price list
10Features of Odawara City
Odawara City is a central city in the western part of the prefecture that prospered as a castle town of Odawara Castle, featuring a diverse landscape from the seaside facing Sagami Bay to the foothills of Hakone and Tanzawa. The Tōkaidō Shinkansen, Odakyu Line, and Tōkaidō Line run through the area, providing good access to the city center.
In older residential areas in the city and suburbs, it is important to check the building’s condition and location for earthquake resistance, insulation, and salt damage preparedness. Kakeru Koumuten is headquartered in Aoba-ku, Yokohama, and offers a wide range of exterior and interior renovations primarily in Kanagawa Prefecture. We can perform roof overlay (cover method) work in-house.
Renovation Service Areas
Kakeru Koumuten accepts requests primarily in Kanagawa Prefecture and Tokyo. The availability of our services may vary depending on the region and the type of work, so please contact us first.
Odawara City Service Area (Main Regions)
Sakae-cho / Hama-cho / Hon-cho / Minami-cho / Shiroyama / Shonai / Hayakawa / Itabashi / Kazamatsuri / Irie / Ogi-cho / Kayama / Tomizu / Hasenji / Sobu / Kamonomiya / Ko-Hachiman / Kōzutsu / Shimo-Soga / Soga / Kami-Soga / Kuno / Ogikubo / Horinouchi / Higashi-machi / Nakazato / Tajima / Sakawa / Hane-ō and other areas throughout Odawara City
・Check out Kakeru Koumuten’s renovation case studies here!
・Roof repairs and renovations in Odawara City
・Leak repairs in Odawara City
・Exterior renovations in Odawara City
・Exterior wall painting in Odawara City
・Waterproofing work in Odawara City
・Kakeru Koumuten Co., Ltd. construction menu and price list
・Reasons why Kakeru Koumuten is chosen!
・About Kakeru Koumuten’s guarantees and aftercare
・Company overview 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！
