Sion
Municipality in the canton of Valais · FSO no. 6266
Parcel data from Jul 2025, statistics computed on 26 Sept 2026.
Canton only partly covered
The parcel data covers only about 51% of the area of the canton of Valais, so the figures for Sion may be incomplete as well.
The parcel data lists 12’356 parcels in Sion, covering 24.4 km². 41% of them have at least one registered building. The median parcel measures 789 m².
Key figures
- Parcels
- 12’356
- 2.2% of the canton
- Total area
- 24.4 km²
0.9% of the canton
- Median area
- 789 m²
Canton: 511 m²
Switzerland: 870 m²
- Built share
- 41%
Canton: 26.2%
Switzerland: 52%
- Median year built
- 1975
Canton: 1980
Switzerland: 1976
About Sion
Sion is a municipality in the canton of Valais.
Among the parcels in the data, the most common zones are Zone agricole (16.6%), Habitat individuel plaine (10.2%) and Zone agricole 1 et 2 (8.4%).
According to the building register, Sion has 6’028 buildings with 21’565 dwellings, 3.6 dwellings per building on average. Residential buildings mix single-family houses and buildings with several dwellings: single-family houses make up 53.9% of them. Non-residential buildings account for 15.2% of all buildings.
Among the built parcels in the data, the newest building most often dates from 1981 to 2000 (20.1%), and on 24.4% of them it dates from 2001 or later. The median year built is 1975.
Built and unbuilt parcels
Built: 5’062 (41%)Unbuilt: 7’294 (59%)
Parcels by zone
| Zone | Parcels | Area | Built |
|---|---|---|---|
| Zone agricole | 2’056 | 5.29 km² | 10.0% |
| Habitat individuel plaine | 1’255 | 1.02 km² | 77.1% |
| Zone agricole 1 et 2 | 1’041 | 1.88 km² | 8.4% |
| Zone résidentielle H30 | 745 | 0.63 km² | 56.4% |
| Aire forestière | 591 | 2.01 km² | 2.5% |
| Vieille ville | 480 | 0.13 km² | 64.8% |
| Villages-Hameaux | 432 | 0.12 km² | 47.2% |
| Centre III | 428 | 0.47 km² | 74.3% |
| Zone agricole protégée | 329 | 0.26 km² | 4.6% |
| Habitat individuel coteau | 320 | 0.33 km² | 69.7% |
| Habitat individuel coteau sensible Différé | 307 | 0.29 km² | 55.0% |
| Zone d'affectation différée | 289 | 0.32 km² | 36.0% |
| Other zones (57 labels) | 4’083 | 11.70 km² | 49.5% |
Zone names are the municipal designations. A canton lists each wording separately.
Building stock
The building register lists 6’028 buildings with 21’565 dwellings here; 2’631 of them are single-family houses.
- Buildings
- 6’028
- Dwellings
- 21’565
- Single-family houses
- 2’631
- Building volume
- 18.6 million m³
Buildings by category
Construction periods
Built parcels by construction period of their newest buildingMaps and geodata for Sion
geopool works as a GIS and geoportal for Sion. 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 Sion
- Building zones and density Sionin room
- ÖREB extract Sionin lookup
- Building age Sionin roots
- Building heights and headroom Sionin roofs
- Solar potential Sionin soolar
- Points of interest and accessibility Sionin scoore
- Tax rates Sionin taxoo