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Residential zone
A residential zone is the name given to a zone defined by the zoning plan of the respective area in which certain buildings may be erected. Residential zones are normally classified according to the restrictions on the type, height and floor area of the buildings that may be constructed in them.
There are three purely residential zones in Switzerland: W1 (single-storey residential building), W2 (two-storey residential building) and W3 (three-storey residential building). Buildings up to a certain height and with a certain number of storeys may be erected in these zones.
The utilization factor or floor area ratio indicates how much building area may be constructed per square metre of plot area.
