Grabs: observed built density
Municipality in the canton of St. Gallen · FSO no. 3273 · Parcel data as of July 2025
- Parcels
- 4’539
2 % of the canton
- Municipal zones
- 24
- Median utilization
- 33 %
Canton: 58 %
Switzerland: 10 %
- Median GFZ
- 0.10
Canton: 0.28
Switzerland: 0.09
- Median height
- 9.1 m
Canton: 9.6 m
Switzerland: 9.5 m
- Median floors
- 2.2
Canton: 2.4
Switzerland: 2.3
About Grabs
Grabs is a municipality in the canton of St. Gallen. The parcel data lists 4’539 parcels in 24 municipal zone types. The zone types with the most parcels are Landwirtschaftszone (1’811), Wohnzone 11.2m (1’030) and Kernzone Erhalt 15m (413).
The median parcel is built to a volume utilization of 33 %; half of the parcels lie between 6 % and 111 %. The canton median is 58 %, so Grabs sits below it.
The median building height is 9.1 m at 2.2 floors, and the median floor-area ratio (GFZ) is 0.10. Parcels built in the last 20 years reach a mean volume utilization of 120 % (402 parcels), higher than the 80 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Landwirtschaftszone | 1’811 | 8 % |
| Wohnzone 11.2m | 1’030 | 95 % |
| Kernzone Erhalt 15m | 413 | 103 % |
| Freihaltezone Natur- und Heimatschutz aB | 282 | 0 % |
| Hinweis.Verkehrsflaeche iB | 201 | 0 % |
| Hinweis.Wald | 189 | 0 % |
| Wohnzone 14.8m | 139 | 117 % |
| Kernzone Erhalt 12m | 109 | 138 % |
| Hinweis.Verkehrsflseche aB | 103 | 0 % |
| Oeffentliche Bauten und Anlagen | 44 | 34 % |
| Arbeitszone 15m | 37 | 50 % |
| Kernzone Zentrum 18m | 35 | 53 % |
| Other zones (12) | 146 | - |
Volume utilization (ratioV)
Of the 4’497 parcels with a value, half lie between 6 % and 111 %. The median is 33 % and the mean 77 %.
Share of parcels by range
- below 50 %53 %
- 50 % to below 100 %18 %
- 100 % to below 150 %13 %
- 150 % and above16 %
Floor-area ratio (GFZ)
Of the 4’497 parcels with a value, half lie between 0.05 and 0.46. The median is 0.10 and the mean 0.27.
Share of parcels by range
- below 0.5079 %
- 0.50 to below 1.0017 %
- 1.00 to below 1.503 %
- 1.50 and above1 %
Building height
Of the 2’675 parcels with a value, half lie between 7.8 m and 10.4 m. The median is 9.1 m and the mean 9.1 m.
Share of parcels by range
- below 8 m27 %
- 8 m to below 12 m66 %
- 12 m to below 20 m7 %
- 20 m and above< 1 %
Number of floors
Of the 1’822 parcels with a value, half lie between 1.8 and 2.8. The median is 2.2 and the mean 2.3.
Share of parcels by range
- below 27 %
- 2 to below 359 %
- 3 to below 534 %
- 5 and above< 1 %
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 | 4’539 | 80 % |
| Last 60 years | 1’600 | 117 % |
| Last 40 years | 1’085 | 116 % |
| Last 20 years | 402 | 120 % |
| Last 15 years | 262 | 131 % |
| Last 10 years | 178 | 132 % |
| Last 5 years | 90 | 137 % |
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).