[Aoba-ku, Yokohama] Vacant House and Used Property Renovation | Costs, Subsidies, and Case Studies
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Details about the subsidy program.
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For those considering renovations of used properties and vacant houses in Seya-ku
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 close to Seya-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 Seya-ku
Seya-ku, Yokohama, is located at the western edge of Yokohama City, featuring a suburban residential area with single-family homes centered around the Sotetsu Line’s Seya and Mitsukyo stations, where agricultural land still remains. It is also gaining attention for large-scale land use plans on the site of the former Kamiseya Communication Facility (such as theme park concepts).
Single-family homes developed during the Showa era are now entering a generational transition period, reaching 40 to 50 years of age. This is why the option of “buying a used single-family home and renovating (renovating) it to suit one’s lifestyle” is expanding in Seya-ku.
Spacious Residential Area Along the Sotetsu Line
A spacious suburban residential area centered around Seya and Mitsukyo, where agricultural land still exists. The movement to live on through used properties and renovations is active.
Updating Showa Era Single-Family Homes
Single-family homes that were initially sold are now 40 to 50 years old. There is a strong demand in this area to update exteriors, water facilities, and insulation to match modern living.
Large-Scale Land Use in Former Kamiseya Area
Development of the former Kamiseyagaya Communication Facility site is attracting attention. The surrounding living environment is also changing, leading to an increase in renovations that consider asset value.
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 to consider, cost estimates, the latest subsidies for 2026, and how to choose a contractor from the perspective of Kakeru Koumuten, which also serves the Seyaku area, for those considering renovations of used properties and vacant houses in Seyaku Ward to ensure they “do not fail.”
The Most Important Thing is “Comparative Estimates”
To avoid failing in renovations, the most crucial factor is comparative estimates. First, obtain estimates from at least three companies that operate in the Seyaku area. Our company, Kakeru Koumuten Co., Ltd., also receives many inquiries and requests for consultations and renovations for 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 builds but also for renovating used properties. Interest in purchasing used homes for renovation and renovation living styles is also increasing. Here, we explain the typical reasons for renovating vacant houses and used properties.
Reason 1 To Live Comfortably as Your Own Home
The most common reason for purchasing and renovating a used property is “to live comfortably.” Older homes often have issues with the roof, exterior walls, and plumbing, making them difficult to live in as they are. By renovating and 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 homes are often valued low as they are, but renovations can enhance their appearance and performance, thereby increasing their value as properties.
Reason 3 To Utilize as Investment or Business
For purchases made for investment or business purposes, 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 construction, and depending on the use and conditions, they may also qualify for subsidies and tax incentives, leading to an increase in those 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 that you can trust to handle your renovation with peace of mind. Since used properties have had previous occupants, 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 the house, and the surrounding environment, and that also provides aftercare following the construction.
Point 2 Always Check the Deterioration of the Building
For used properties and vacant houses, it is crucial to check which parts have deteriorated and to what extent beforehand. Since other people have lived there before, the 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. Additionally, in 2000, regulations regarding joints and foundations were strengthened, making older buildings more likely to lack earthquake resistance. Check the condition of the building before starting work and be sure to check earthquake resistance and insulation.
Point 4 Check Subsidy Programs and Renovation Tax Deductions
To keep construction costs down, it is important to check for subsidies and renovation tax deductions. Subsidies are provided by the national and local governments, and part of the costs for seismic retrofitting, energy-saving construction, and barrier-free renovations can be supported. Tax deductions include the “housing loan tax deduction” when using a housing loan, as well as systems that allow for deductions on certain costs even with personal funds. These can sometimes be used in combination, so it is essential to check in advance and use them strategically as a key to 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 costs by area 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 (Cover Method) | Approximately 700,000 to 2,500,000 yen |
| Exterior Wall Painting | Approximately 600,000 to 1,500,000 yen |
| Exterior Wall Replacement / Exterior Wall 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-style Room to Western-style 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 through 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 Seya 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 Seya Ward may be able to use.
*The following information is as of September 3, 2026. The content, duration, and budget of the systems change annually, and many will end once the budget limit is reached. Please check for the latest information with our company or the respective offices before applying. Kakeru Koumuten can assist with confirming the systems and providing necessary documents, but the applicant and application methods may differ 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.
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 the building structure, targeting eco-friendly housing equipment, child-rearing compatible 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 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 will be accepted starting 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 may occur if the budget limit is reached). Applications must be made through registered contractors.
This program targets 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 depending 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 have been accepted since March 31, 2026, and subsidy 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.
This program targets the replacement of high-efficiency water heaters 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 after November 28, 2025, and applications will be accepted starting March 31, 2026 (early termination may occur if the budget limit is reached).
Yokohama City Program
This is a unique program by Yokohama City to support renovations that improve existing homes to high insulation performance for the fiscal year 2026 (Reiwa 8). It targets child-rearing generations who are moving to existing homes and conducting whole-house insulation renovations, as well as households that continue to live in their current homes while performing whole or partial insulation renovations.
Reservation applications are from April 1, 2026, to November 30, and the main applications are from May 1 to November 30 (may end early if the budget limit is reached). Only registered businesses under “Yokohama Health and Energy-Saving Housing” can apply; direct applications from individuals are not permitted. There are requirements regarding housing, households, contracts, and businesses. For more details, please check the official Yokohama City page.
This is the main system for reinforcing old wooden houses against earthquakes. It is particularly effective for those who are purchasing used detached houses and planning earthquake renovations.
Eligible: Conventional wooden individual houses with two stories or less that received construction approval before the end of May 2000. Buildings determined to have an upper structure evaluation score of less than 1.0 in an earthquake diagnosis. The subsidy rate is within 4/5 of the construction cost. Applications for the 2026 fiscal year are being accepted from April 1 (will end as soon as the budget is reached). The contact point is the Yokohama City Bureau of Architecture, Disaster Prevention Division.
This is for those who have been certified as requiring support or care. Eligible expenses include the installation of handrails, elimination of steps, changes to flooring materials, and replacement of doors and toilets. It can also be utilized when using a used house for a two-family setup.
Of the maximum subsidy limit of 200,000 yen, those with a 10% burden will receive 90% (up to 180,000 yen) as a benefit. Depending on income, there may be cases of a 20% or 30% burden. A prior application is required before the start of construction. For details, please consult your care manager or the district office.
This system is for utilizing vacant houses as community contribution facilities (such as child-rearing support, elderly support, co-working spaces, and NPO activity bases). It is aimed at those considering investment and community utilization.
The subsidy rate is 1/2, with a maximum of 1 million yen for interior and exterior renovations for community contribution facilities + a maximum of 1.5 million yen for earthquake renovations (total maximum of 2.5 million yen). There are requirements such as being a single-family home within Yokohama City, complying with the Building Standards Act, and not being a designated vacant house. For details, please check the official Yokohama City page.
See also about 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 construction such as seismic reinforcement, energy-saving, barrier-free, 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 due to seismic reinforcement, energy-saving renovations, and barrier-free renovations.
- Kanagawa Prefecture 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 an additional application period 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 page of Kanagawa Prefecture.
Subsidies and tax reductions may be combined, but there are restrictions on duplication for the same construction. Kakeru Koumuten will organize and propose “which system can be used for your construction” after 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)!
Exterior Renovation Case Studies in Seya-ku
| Construction Location | Aoba-ku, Yokohama |
|---|---|
| Work Details | Temporary scaffolding installation / Roof overlay work |
| Existing Base | Existing roofing material: Slate |
| New Materials Used | Roofing material: Aijii Industry / Super Galtect Durability: Approximately 35-40 years / In-house warranty: 10 years / Manufacturer warranty: Coating 15 years, Rust 20 years, Puncture 25 years |
| Price Range | 600,000 yen – 700,000 yen |
| Completion Month | March 2024 |
Our Proposal
We checked the condition of the existing slate roof and proposed the roof overlay method, which allows for the installation of new roofing materials without removing the existing roof. We have adopted Super Galtect, which excels in insulation, durability, and lightweight properties, ensuring long-term protection for the entire roof.
▶ See exterior renovation case studies in Aoba-ku, Yokohama!
▶ For roof repairs and renovations in Yokohama
▶ Detailed information on roof remodeling costs
07How to Choose a Renovation Contractor for Used Properties and Vacant Houses in Aoba-ku
There are many renovation companies that serve Aoba-ku, and it can be confusing to decide which one to choose. When requesting renovations, be sure to check the following 5 points.
- Experience in renovation work is abundant
- Check for warranties and after-sales maintenance
- Obtain estimates from multiple contractors (at least 3 companies)
- Confirm whether they perform renovations in-house
- Check if they offer color simulations and perspective drawings
1. Abundant Experience in Renovation Work
Many remodeling contractors publish their construction achievements 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 ample experience.
Google and review sites can also be helpful. It is important to check the content of low ratings, the company’s responses, and the timing of the posts. In particular, Google reviews can be informative, but don’t make your decision based solely on reviews; consider the construction achievements, estimates, and warranty details for a comprehensive assessment.
2. Confirm the presence of warranties and aftercare services
When selecting a contractor, be sure to check for warranties. If repairs are needed within the warranty period, they may be done for free. The duration varies by contractor and paint type, but typically ranges from 1 to 10 years (emergency repairs and partial repairs are often not covered). Some contractors also offer aftercare services in addition to warranties, 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)
When requesting renovations, be sure to obtain estimates from multiple contractors. Even for the same construction content, warranties, aftercare services, and prices can vary significantly. Having multiple estimates can also make price negotiations easier.
When comparing estimates, look closely at not just the costs 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 components or skipping steps can reduce costs, so it’s important not to judge solely based on price.
Click here to see detailed points for comparing estimates
4. Confirm whether the contractor performs 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 no inherent problem with the system of subcontractors, it is important to confirm whether the contracted company understands the construction details and clearly defines the responsibilities for quality control and guarantees. With in-house construction, it is easier to coordinate with the site, allowing for quick responses in case of any troubles.
5. Do they support color simulations and perspective drawings?
Choosing colors and envisioning the post-construction appearance can be challenging for both exteriors and interiors. With simulations, you can reduce the risk of mistakes like “it turned out differently than I imagined.” Since it is difficult to redo once construction is done, it is advisable to choose a company that can provide flexible simulations.
08Reasons why Kakeru Koumuten is chosen for renovations of used houses in Seya-ku
One reason is that “Kakeru Koumuten is also close to Seya-ku,” but
“Our unique approach to renovating vacant and used properties that cannot be imitated by other companies”
has received high praise from many customers.
We have absolute confidence in “cost,” “quality,” and “plans” for renovations in Seya-ku. Please compare with estimates from other companies.
The most important aspect of renovations is getting multiple estimates. Request estimates from at least three renovation contractors that cover Seya-ku!
1. Equipment specialized for in-house renovations
Kakeru Koumuten has established warehouses and material storage to provide high-quality renovations at low cost. We have five bases in Kanagawa and Tokyo, including Aoba-ku, Yokohama, and Machida City, Tokyo.
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 own 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. Our company is working to reduce waste disposal costs by separating and recycling waste materials.
Showroom dedicated to exterior renovations
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 a heat insulation paint testing machine and color simulation. The showroom is a 3-minute walk from Eda Station in Aoba-ku, Yokohama. It has good access from within Yokohama city.
2. In-house Construction Focused on Exterior Work
A major strength of Kakeru Koumuten Co., Ltd. is its in-house construction focused on exterior work. By maintaining a consistent system from inquiry to project completion, we can provide high-quality renovations at reduced costs. Since one representative handles everything from the estimate to project completion, communication is smooth without changes in sales or project management. We carry out construction with our own craftsmen, from temporary scaffolding setup to exterior wall painting and roof renovations. 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 specialists, ensuring confidence in our construction techniques. We are capable of handling large-scale painting projects for factories and apartment complexes as well.
4. Warranty and Aftercare
Exterior painting and joint sealing work come with a warranty. Aftercare is available every year, and we send out notification DM annually. If you have concerns about the warranty, please click on 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 height, we can respond using a drone. We also use a thermal imaging camera for leak investigations. We respond according to our customers’ wishes and also accept emergency measures for sudden leaks 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 conduct regular skill improvement training so that 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 create color simulations for exterior wall painting, as well as simulations for metal siding and roof overlays. We can create simulations from actual photos of your building and propose several patterns with our recommended color schemes. We also accommodate “test painting” and “sample board arrangements” to confirm 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 suggest recommended simulations. We create realistic perspectives from actual floor plans.
8. Solar Panel and Battery Installation Work Available!
More customers are introducing solar power systems, which have generous subsidies, in conjunction with renovations of used properties. Kakeru Koumuten Co., Ltd. also handles solar power installation work 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 Seya Ward | Frequently Asked Questions
We will answer the most frequently asked questions from those considering renovations of used properties and vacant houses in Seya Ward.
Is it better to renovate after buying a used property or consult before purchasing?
We recommend that you consult with us before making a purchase decision if possible. Used properties often have deterioration that is not visible, and there are many cases where unexpected construction costs arise after purchase. By having Kakeru Koumuten check the condition of the property you are considering in advance and provide 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 Seya Ward?
It depends on the condition of the building, but we prioritize areas that, if left unattended, can lead to further damage, such as leaks, termites, and structural or seismic issues. After that, we will determine the order of renovations for the roof and exterior walls, water areas (kitchen, bathroom, toilet), and insulation based on your budget and impact on your daily life. In suburban residential areas along the Sotetsu line, 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 Seya Ward. What should I look at first?
In Seyagaku, there are many spacious single-family residential areas with remaining farmland, and homes built during the Showa era may be reaching the time for updates to their roofs and exterior walls. We recommend starting with inspections for exterior, leaks, and seismic resistance. You can utilize the seismic retrofitting subsidies available in Yokohama City (up to 1.15 million yen for general cases) and insulation improvement subsidies, so we will propose these options as well. Please feel free to consult us about renovations that consider asset value.
How much does a full renovation (full remodel) cost?
The cost of a full renovation for a single-family home 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 both interior and exterior work, water facilities, 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 program. For example, the national “Mirai Eco Housing 2026 Project” requires registered contractors (construction companies) to apply. For seismic retrofitting or home modifications under nursing 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 programs are available,” so please feel free to consult us first.
What risks are there if I leave a vacant house unattended?
Risks include the progression of leaks and termite damage, depreciation of asset value due to deterioration of the exterior walls and roof, 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 fixed property tax may 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 concerned about seismic resistance. How can I assess the seismic safety of a used single-family home?
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 regulations for joints and foundations). For wooden 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. can 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 facilities, 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 Seyagaku within your service area? Will there be any travel fees?
Yes, Seya-ku is within the service area of Kakeru Koumuten Co., Ltd. Our headquarters is located in Aoba-ku, Yokohama, and we have five bases in Kanagawa and Tokyo, covering the entire area of both prefectures. 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 Seya-ku 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 room is 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. Estimates are completely free.
Get your free estimate and consultation here
If our company is inferior to others, you are free to decline outright.
See Kakeru Koumuten’s case studies
See our service menu and price list
10Features of Seya-ku
Seya-ku, Yokohama, is located at the western edge of Yokohama City, centered around the Sotetsu Line’s Seya and Mitsuzaka stations, featuring a suburban residential area with remaining farmland, providing a green and spacious environment. It is also attracting attention for large-scale land use at the former Kamiseya Communication Facility site.
Houses developed during the Showa period are now reaching a generational transition, and the choice to continue living through purchasing used homes and renovating them is becoming established. Kakeru Koumuten has its headquarters in Aoba-ku, Yokohama, and serves Seya-ku from its five bases in Kanagawa and Tokyo, focusing on in-house construction for exterior work such as roofs and walls.
Areas Available for Renovation
Kakeru Koumuten accepts requests from all over Kanagawa and Tokyo.
Service Area in Yokohama City, Seya-ku (Main Areas)
Futatsubashi-cho / Mitsuzaka / Seya / Seya-cho / Chuo / Minami-Seya / Kitamachi / Hongou / Miyazawa / Akugawa-Higashi / Akugawa-Nishi / Akugawa-Minami / Takemura-cho / Shimo-Seya / Hashido / Gokanmachi / Kitashin / Aizawa / Oroshimachi / Higashino / Meguro-cho / Kamiseya-cho and other areas throughout Seya-ku
・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！
