As interest in single-story homes continues to grow, more homeowners are choosing to build them on a typical residential footprint of 35 tsubo (about 115.7㎡). With careful planning, this size can provide a comfortable living environment for a family of three to four.
What is a 35-tsubo single-story home? Size and cost guidelines
At about 115.7㎡, 35 tsubo is a size that can accommodate a 3〜4LDK layout. It exceeds the guided residential floor area standard for a three-person household (about 30.3 tsubo), while feeling slightly compact for a four-person family (about 37.8 tsubo). A 3LDK home typically costs about 10 to 20 million yen, and a 4LDK home is generally around 20 million yen.
What layout ideas work well for a 35-tsubo single-story home?
For families with children: secure a children's room and a guest room
If you have one or two children, it is practical to prepare one room from the start and use a design that can later be divided into two rooms with a partition. This helps reduce future renovation costs. A guest room also makes it easier to maintain privacy.
Create a dedicated workspace
As working from home has become more common, a workspace separated from the living room is now a highly practical feature. It can also serve as a room for hobbies.
A partially shared two-generation home is also possible
With a 4LDK layout, it is also possible to create a two-generation home with a shared LDK. One advantage is that construction costs can be lower than in a fully separated design.
Three points for making a 35-tsubo single-story home comfortable
1. Secure storage space with smart planning
One challenge of single-story homes is that storage can easily become insufficient. By making use of vertical space, such as installing a loft or shelves in dead space, you can increase storage without reducing the living area.
2. Build in flexibility to change the number of rooms
If you plan partition walls so rooms can be added or reduced as children grow and family needs change, long-term usability improves significantly.
3. Group water-related areas together
If the kitchen, bathroom, and toilet are spread out, circulation becomes more complicated and construction and maintenance costs also increase. By concentrating water-related areas in one place, you can streamline household flow and keep costs under control.
What are the characteristics of different single-story home shapes?
- I-shaped：simple circulation and lower construction costs. However, daylighting and sound insulation require attention
- L-shaped：makes it easier to separate private space from guest space. Construction costs are somewhat higher
- Courtyard-shaped：allows daylight into every room from the inner courtyard. Drainage maintenance is necessary
- U-shaped：offers a spacious courtyard for gardening. Costs tend to be higher
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Frequently Asked Questions (FAQ)
Q1. Can a family of four live in a 35-tsubo single-story home?
It may feel somewhat compact, but comfortable living is achievable with thoughtful storage and layout planning. It is best to review it against the guided residential floor area standard (four people: about 37.8 tsubo).
Q2. How much does it cost to build a 35-tsubo single-story home?
For a 3LDK layout, about 10 to 20 million yen is a common guideline. The actual cost varies depending on materials, equipment, and construction method.
Q3. Is a single-story home more expensive to build than a two-story home?
With the same total floor area, a single-story home is generally somewhat more expensive because the foundation and roof area are larger. That said, it also offers benefits such as no stairs and simpler circulation.
Q4. Can a loft be added to a single-story home?
Yes. Attic storage (loft) is not included in total floor area under the Building Standards Act, so it is effective for securing storage space. However, there are limits on height and floor area.
