9x9 square, two-story detached house

This project involves the design of a detached house based on a square floor plan with sides measuring 9 meters (9,000 mm). The square shape is frequently used as a prototype for small homes because it offers an efficient ratio of floor area to building envelope; furthermore, dividing the plan into a 3×3 grid of 3,000 mm modules allows for the simultaneous organization of structural, mechanical, and spatial layouts. The building is designed as a two-story structure. It employs a vertical zoning strategy, separating the communal areas—such as the entrance, living room, kitchen, and dining area—on the first floor from the private areas—comprising three bedrooms (one master bedroom and two children's rooms)—on the second floor, intended for the permanent residence of a family of three to four. The central cell of the 3×3 grid (3,000×3,000 mm) serves as a core housing the staircase and restrooms, while the remaining eight cells are utilized as living spaces. Parking is accommodated by a single outdoor space in the yard, allowing the 9×9 meter building mass to remain intact.
Against a person
Why these numbers
- 3000mmplanning_module
The floor plan is divided into a 3×3 grid with 3,000mm modules, and all interior wall centerlines are aligned to this grid.
- 2층floor_count
The scale consists of 2 stories above ground, with the 1st floor dedicated to common areas and the 2nd floor to bedroom areas, with vertical separation.
- 135m2min_site_area
Site area: To be determined. Actual measurement and verification required through cadastral map copy and land use plan confirmation. Assuming a tentative building coverage ratio of 60%, a minimum site area of 135m² or greater is required to establish an 81m² building footprint.
- 2400mmceiling_height
The living room ceiling height is secured at 2,100mm or greater (planned value 2,400mm or greater).
- 3000mmcore_cell_width
The central cell of the 3×3 grid (3,000×3,000mm) serves as a core combining stairs and restroom on both the 1st and 2nd floors, with piping shafts penetrating through at the same position on both levels.
- 3000mmcore_cell_depth
The central cell of the 3×3 grid (3,000×3,000mm) serves as a core combining stairs and restroom on both the 1st and 2nd floors, with piping shafts penetrating through at the same position on both levels.




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