What are building coverage ratio and floor area ratio?
“Building coverage ratio” and “floor area ratio” are the details of the size of the building relative to the size of the site so that people who build houses can live safely and comfortably. is.
What is the building coverage rate? What is floor area ratio?
In simple terms, the coverage ratio is the ratio of the building area (the area when the building is viewed from directly above) to the site area (the area of the land on which the building is built). The building area is also called “Tatetsubo”, but it is expressed as the horizontal projected area when the building is viewed from directly above.
For example, a building with a construction area of up to 60 square meters can be built on a 100 square meter site in an area designated as 60% building coverage.
The occupancy rate limits the so-called flat area, but the floor area ratio is the “ratio of the three-dimensional space to the site area”.
For example, on a 100 square meter site designated as 100% floor area, a building with a total of 100 square meters, 60 square meters on the first floor and 40 square meters on the second floor, can be built.
The building coverage ratio and floor area ratio are also determined by the city planning of each local government, based on securing fire prevention, evacuation routes, ventilation, and lighting.
Even on land of the same site area, the houses that can be built will change depending on the building coverage ratio and floor area ratio.
