Open space figure — the predecessor of the green space figure
What is the open space figure (FFZ)? - The definition
Die Open space figure (FFZ) In Swiss construction, states how high the proportion of undeveloped land on a plot of land must be. This indicator plays an important role in controlling the building density in residential areas and ensures that there is enough open space for green and recreational areas. Today, the number of open spaces is increasingly driven by Green area figure (GZ) replaces, which only includes unsealed, green areas, whereas the open space figure also includes sealed areas. The Institute for Spatial Development (IRAP) has recommended abolishing the open-space rate in favour of more environmentally friendly alternatives such as the green space rate.
How do you calculate the free space digit?
The calculation of the open space figure comprises two steps: First, the eligible open space is determined, which comprises open and uncovered areas such as green areas and playgrounds. This area is then set in relation to the eligible plot area.
instance: For a plot of 1,000 m², which comprises 420 m² of green area, a 180 m² residential building, 150 m² of paved play and recreation areas and 140 m² for parking spaces and access roads, the open space figure is 0.71. This means that 71% of the land is used as an undeveloped and partly landscaped area, meaning that the plot meets the requirements for residential areas, which usually require a minimum greening of two thirds of the area.
What is considered eligible land area?
Die eligible land area (AgSF) comprises all areas within the building zone that belong to the plot of land and are intended for development. This includes house access roads and parking areas. Areas used to develop the property, such as land, rough and fine development areas, are excluded. The eligible land area is the basis for calculating the open space figure and includes all areas that are directly related to the development.
What is the eligible open space?
Die eligible open space (AfF) comprises all open and uncovered areas on a building plot, both green and sealed areas, such as paved play or recreation areas and parking areas. In contrast to the green space figure, which only includes unsealed areas, the open space figure also allows sealed open spaces to allow greater flexibility in design.
In residential zones should at least two thirds of the vacant area be green, in Neighborhood and center zones The proportion may be lower. In addition to traditional green areas, the greener areas also include minimally planted rock gardens, but no artificial turf. eligible open space (AfF) comprises all open and uncovered areas on a building plot, both green and sealed areas, such as paved play or recreation areas and parking areas. In contrast to the green space figure, which only includes unsealed areas, the open space figure also allows sealed open spaces to allow greater flexibility in design.In residential zones should at least two thirds of the vacant area be green, in Neighborhood and center zones The proportion may be lower. In addition to traditional green areas, the greener areas also include minimally planted rock gardens, but no artificial turf.
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