Au (SG)
Municipality in the canton of St. Gallen · FSO no. 3231
Parcel data from Jul 2025, statistics computed on 26 Sept 2026.
Open map at the Au (SG) center
The parcel data lists 2’278 parcels in Au (SG), covering 4.7 km². 75.5% of them have at least one registered building. The median parcel measures 765 m².
Key figures
- Parcels
- 2’278
- 1.2% of the canton
- Total area
- 4.7 km²
0.2% of the canton
- Median area
- 765 m²
Canton: 938 m²
Switzerland: 870 m²
- Built share
- 75.5%
Canton: 66.6%
Switzerland: 52%
- Median year built
- 1982
Canton: 1977
Switzerland: 1976
About Au (SG)
Au (SG) is a municipality in the canton of St. Gallen and holds 1.2% of the canton's parcels in the data, on 0.2% of their area. The median parcel in Au (SG) measures 765 m², smaller than the canton median of 938 m². Au (SG) is more built-up than the canton as a whole: 75.5% of its parcels have a building, against 66.6% across the canton.
The zones with the most parcels are BauG Wohnzone W2b (39.3%), BauG Wohn-Gewerbezone WG3 (10.3%) and BauG übriges Gemeindegebiet Strasse Weg (8.1%). In total, Au (SG) uses 23 zone designations.
According to the building register, Au (SG) has 2’585 buildings with 4’245 dwellings, 1.6 dwellings per building on average. Most residential buildings are single-family houses (71.6%). Non-residential buildings account for 31.4% of all buildings.
Built parcels most often have their newest building from 1961 to 1980 (28.2% of them), and 22.6% have one from 2001 or later. The median year built, 1982, is close to that of the canton as a whole (1977).
Built and unbuilt parcels
Built: 1’719 (75.5%)Unbuilt: 559 (24.5%)
Parcels by zone
| Zone | Parcels | Area | Built |
|---|---|---|---|
| BauG_Wohnzone W2b | 896 | 0.65 km² | 92.0% |
| BauG_Wohn-Gewerbezone WG3 | 234 | 0.27 km² | 93.2% |
| BauG_übriges Gemeindegebiet Strasse_Weg | 185 | 0.47 km² | 4.3% |
| BauG_Wohn-Gewerbezone WG2 | 168 | 0.15 km² | 91.7% |
| BauG_Landwirtschaftszone | 163 | 1.06 km² | 18.4% |
| BauG_Wohnzone W3 | 128 | 0.14 km² | 96.9% |
| BauG_Wohnzone W1 | 105 | 0.10 km² | 84.8% |
| BauG_Zone für öffentliche Bauten und Anlagen | 62 | 0.31 km² | 82.3% |
| BauG_Kernzone K4 | 56 | 0.06 km² | 100.0% |
| Hinweis.Wald | 49 | 0.08 km² | 4.1% |
| BauG_Kernzone K3 | 43 | 0.05 km² | 95.3% |
| BauG_Gewerbe-Industriezone GI A | 37 | 0.11 km² | 83.8% |
| Other zones (11 labels) | 152 | 1.22 km² | 59.9% |
Zone names are the municipal designations. A canton lists each wording separately.
Building stock
The building register lists 2’585 buildings with 4’245 dwellings here; 1’102 of them are single-family houses.
- Buildings
- 2’585
- Dwellings
- 4’245
- Single-family houses
- 1’102
- Building volume
- 4.6 million m³
Buildings by category
Construction periods
Built parcels by construction period of their newest buildingMaps and geodata for Au (SG)
geopool works as a GIS and geoportal for Au (SG). Its parcel map shows the parcels of the official cadastral survey with their area, their zone from the municipal zoning plan and their buildings, on swisstopo maps. Building zones, the property map and the geodata of each parcel open on the geopool map. The ÖREB extract of a parcel (public-law restrictions on landownership) is in lookup.
Explore more data for Au (SG)
- Building zones and density Au (SG)in room
- ÖREB extract Au (SG)in lookup
- Building age Au (SG)in roots
- Building heights and headroom Au (SG)in roofs
- Solar potential Au (SG)in soolar
- Points of interest and accessibility Au (SG)in scoore
- Tax rates Au (SG)in taxoo
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