【Aoba, Yokohama】|Interior Renovation|We performed a renovation by replacing the bathroom in a used property and redoing the flooring in the living room and kitchen!

This is a case study of an interior renovation in Aoba Ward, Yokohama City, not an exterior renovation.
Kakeru Koumuten Co., Ltd. also handles interior painting and interior work!
This customer underwent a
bathroom replacement and floor replacement!
Aoba Ward, Yokohama City – Interior Work Construction Steps
Bathroom Replacement Work
1. Demolition of Existing Bathroom
2. Preliminary Piping
3. Insulation Installation
4. Installation of New Bathroom
There are five main items in the assembly of a new unit bath.
① Assembly of the floor, bathtub, walls, ceiling, and entrance door
② Connection of water supply, drainage, and hot water
③ Connection of ventilation fans and lighting
④ Installation of the bathroom entrance frame
⑤ Test operation and leak confirmation
※ When replacing the bathroom entrance frame, the wallpaper in the washroom may also be affected,
so there is a possibility that the washroom wallpaper will be replaced in the same work.
Bathroom Replacement Before
Bathroom Replacement After
What is a traditional method?
It is an old-fashioned tiled bath. Since it is built on-site, it can be prone to leaks as it ages.
What is a unit bath?
It is a bath made by assembling factory-produced floor, walls, and bathtub on-site. It is less prone to leaks and easier to clean.
Floor Replacement Work
Western Room ① Before
Western Room ① After
・The durability of carpet is approximately 7 to 10 years.
・The durability of flooring is approximately 10 to 20 years.
Western Room ② Before
Western Room ② After

The durability of flooring is approximately 10 to 20 years.
☞As the durability period passes, the flooring may start to lift and show dirt more prominently.
Kitchen Before
Kitchen After
The durability of cushioned vinyl flooring (CF) is approximately 8 to 10 years.
☞As the durability period passes, the cushioned vinyl flooring may start to peel and show dirt more prominently.
Materials Used
| Materials Used |
Bathroom Flooring |
|---|
Interior Renovation Guidelines
1. Wallpaper Renovation
- 10 to 15 years
Wallpaper deteriorates depending on usage frequency and environment, so it is advisable to consider replacement every 10 to 15 years. In particular, in areas with high humidity such as kitchens and bathrooms, or in places with strong sunlight, fading, dirt, and mold can develop more quickly.
2. Flooring Renovation
- 10 to 15 years
Flooring tends to show wear and scratches, so it is a good idea to consider renovation every 10 to 15 years. Particularly in households that frequently move heavy furniture or have pets, wear can progress more rapidly. It is important to not only repair the surface of the flooring but also check the condition underneath and carry out renovations as needed.
3. Toilet Renovation
- 10 years
Toilets generally have a replacement guideline of about 10 years.
4. Kitchen and Bathroom Renovation
- 10 to 20 years
Kitchens and bathrooms are used frequently, so equipment can become outdated or deteriorate. In particular, the deterioration of sinks, stoves, and bathtubs can occur quickly, so it is advisable to consider renovation every 10 to 20 years. Additionally, replacing with the latest equipment can improve usability and energy efficiency.
5. Lighting and Outlet Renovation
- 10 to 20 years
Replacing lighting fixtures and outlets is typically done when they look outdated or their functionality declines. Moreover, incorporating the latest LED lighting and smart features can enhance convenience and energy efficiency.
6. Door and Window Renovation
- 15 to 20 years
When considering door and window renovations, it is advisable to do so when you notice difficulty in opening and closing or a decrease in insulation performance. In particular, replacing insulation materials or installing double-glazed windows can significantly improve energy efficiency.
7. Renovation of Air Conditioning and Heating Systems
- 10 to 15 years
Air conditioning and heating equipment may experience a decline in performance after about 10 years, so it is recommended to replace or maintain them every 10 to 15 years. In particular, air conditioners tend to accumulate dirt in the filters and interiors, leading to decreased efficiency.
8. Overall Renovation (Complete Interior Update)
- 20 to 30 years
Renovating the entire interior of the house (walls, floors, ceilings, fixtures, etc.) is typically done once every 20 to 30 years.
Points to Consider When Deciding on Renovation Timing
Changes in Lifestyle
It is a good idea to create opportunities to reassess the interior in line with changes in family structure or shifts in work and hobbies.
Malfunctions in Equipment or Functions
For example, if heating and cooling are less effective, or if the kitchen or bathroom has become inconvenient to use, these signs indicate that it may be time for a renovation.
Aesthetics and Comfort
If dirt, scratches, or fading become noticeable, or if you feel that the interior has become outdated, it is time to consider a renovation.
Leave Your Interior Renovation in Aoba Ward, Yokohama City to Kakeru Koumuten!
As our company is based in Yokohama City, Kanagawa Prefecture, we also accept requests for interior renovations in Aoba Ward, Yokohama City.
While we specialize in exterior renovations, we also have extensive experience in interior renovations.
If you have any concerns or questions, such as “I just want to know the estimate for the renovation” or “My house is getting old, and I want to at least make it look nice,” please feel free to contact us!
Conclusion
The above outlines our track record in interior renovations in Aoba Ward, Yokohama City.
Although our company primarily handles exterior renovations such as roofing, we also frequently address interior renovations and repair work due to water leakage damage.
Additionally, if you have fire insurance, repairs for interior damage caused by water leakage may be covered by your policy.
Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exterior walls, or exteriors, please consult Kakeru Koumuten Co., Ltd. in Aoba Ward, Yokohama City!
We are also happy to assist with interior matters! Since our main work involves exterior renovations, it may require consultation, but we hope to be of help in any way we can if you are in need!!
Kakeru Koumuten Co., Ltd. performs everything from temporary scaffolding work to roofing and exterior painting completely in-house.
We are confident that we do not fall short compared to other companies in terms of “cost, quality, and efficiency”!
Since we are confident, we also welcome comparative estimates!
We offer comprehensive workmanship warranties and aftercare maintenance, and we have received positive feedback for our appropriate proposals that match the cost performance and our customers’ future life plans!
“I’m glad I asked them!” We take every request seriously to ensure you feel this way.
We also have information on roofing costs and pricing plans for the roof overlay (cover method), so please take a look if you are interested!
We look forward to your inquiries. Thank you very much.
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・Painting DIY Plan! A must-see for those who want to try DIY roof and exterior wall painting! We will only set up the scaffolding!
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・Latest! About subsidies and reduction systems available for renovations!
・How much does it cost to repair the roof? We will introduce the cost range!
・What is Kasagi? We will explain the role and repair methods of Kasagi in detail!
・Renovation store in Yokohama City, Kanagawa Prefecture | What is roof overlay (cover method)?
・Exterior wall cleaning construction plan that does not require temporary scaffolding!
Helpful information about exterior renovations can be found here!
LINE consultations are also very welcome◎
contact Kakeru Koumuten Co., Ltd.
Kakeru Koumuten is a young company whose team is, on average, in their late twenties, but our skills are second to none.
Our greatest strength is that we handle scaffolding, roofing and painting entirely in-house. In an industry where these tasks are usually divided among contractors, our complete service simplifies project management and helps keep costs down. Above all, if a problem arises, we respond promptly.
We proudly describe ourselves as the youngest and most helpful renovation company in Kanagawa!





