Altstätten: observed built density
Municipality in the canton of St. Gallen · FSO no. 3251 · Parcel data as of July 2025
- Parcels
- 6’326
3 % of the canton
- Municipal zones
- 24
- Median utilization
- 45 %
Canton: 58 %
Switzerland: 10 %
- Median GFZ
- 0.19
Canton: 0.28
Switzerland: 0.09
- Median height
- 9.4 m
Canton: 9.6 m
Switzerland: 9.5 m
- Median floors
- 2.3
Canton: 2.4
Switzerland: 2.3
About Altstätten
Altstätten is a municipality in the canton of St. Gallen. The parcel data lists 6’326 parcels in 24 municipal zone types. The zone types with the most parcels are BauG Landwirtschaftszone (2’031), BauG Wohnzone WE (791) and BauG Wohnzone W2 (788).
The median parcel is built to a volume utilization of 45 %; half of the parcels lie between 6 % and 100 %. The canton median is 58 %, so Altstätten sits below it.
The median building height is 9.4 m at 2.3 floors, and the median floor-area ratio (GFZ) is 0.19. Parcels built in the last 20 years reach a mean volume utilization of 120 % (579 parcels), higher than the 89 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| BauG Landwirtschaftszone | 2’031 | 0 % |
| BauG Wohnzone WE | 791 | 79 % |
| BauG Wohnzone W2 | 788 | 85 % |
| Hinweis.Wald | 335 | 0 % |
| BauG Wohn-Gewerbezone WG3 | 321 | 63 % |
| BauG Kernzone K3 | 287 | 101 % |
| BauG Wohn-Gewerbezone WG2 | 269 | 92 % |
| BauG Kernzone K2 | 256 | 87 % |
| Hinweis.Verkehrsflaeche iB | 240 | 0 % |
| Hinweis.Verkehrsflaeche aB | 208 | 0 % |
| BauG Kernzone | 170 | 136 % |
| Arbeitszone 16 | 118 | 69 % |
| Other zones (12) | 512 | - |
Volume utilization (ratioV)
Of the 6’281 parcels with a value, half lie between 6 % and 100 %. The median is 45 % and the mean 76 %.
Share of parcels by range
- below 50 %51 %
- 50 % to below 100 %24 %
- 100 % to below 150 %13 %
- 150 % and above12 %
Floor-area ratio (GFZ)
Of the 6’280 parcels with a value, half lie between 0.05 and 0.54. The median is 0.19 and the mean 0.41.
Share of parcels by range
- below 0.5072 %
- 0.50 to below 1.0018 %
- 1.00 to below 1.505 %
- 1.50 and above5 %
Building height
Of the 3’745 parcels with a value, half lie between 7.9 m and 11.3 m. The median is 9.4 m and the mean 9.7 m.
Share of parcels by range
- below 8 m27 %
- 8 m to below 12 m57 %
- 12 m to below 20 m16 %
- 20 m and above< 1 %
Number of floors
Of the 2’772 parcels with a value, half lie between 1.9 and 3.1. The median is 2.3 and the mean 2.5.
Share of parcels by range
- below 26 %
- 2 to below 352 %
- 3 to below 539 %
- 5 and above3 %
Building age cohorts
Mean volume utilization of the parcels built inside each window, from all years on record down to the last five. The windows overlap: the last 20 years include the last 5.
| Built in | Parcels | Mean utilization |
|---|---|---|
| All years | 6’326 | 89 % |
| Last 60 years | 2’180 | 130 % |
| Last 40 years | 1’486 | 117 % |
| Last 20 years | 579 | 120 % |
| Last 15 years | 379 | 126 % |
| Last 10 years | 228 | 134 % |
| Last 5 years | 114 | 140 % |
How to read this page
room shows observed built density: what has been built on the parcels, not what the zoning permits. Volume utilization (ratioV) compares the built volume of a parcel with the reference volume of its municipal zone type. The floor-area ratio (GFZ) is floor area divided by parcel area; building height and number of floors are taken from the buildings on a parcel. Figures pool all municipal zones of the area. Medians and quartiles are read from bins 10 points (ratioV), 0.1 (GFZ), 2 m (height) and 1 floor wide, so they are exact to within one bin; means are exact. A parcel counts in a distribution only when the parcel data has a value for it. The floors distribution leaves out parcels without a building (0 floors).