Aarau
Municipality in the canton of Aargau · FSO no. 4001
Parcel data from Nov 2026, statistics computed on 29 Oct 2026.
Open map at the Aarau centerThe parcel data lists 4’831 parcels in Aarau, covering 12.3 km². 77.1% of them have at least one registered building. The median parcel measures 668 m².
Key figures
- Parcels
- 4’831
- 1.6% of the canton
- Total area
- 12.3 km²
- 0.9% of the canton
- Median area
- 668 m²
- Canton: 861 m²
- Switzerland: 881 m²
- Built share
- 77.1%
- Canton: 55.2%
- Switzerland: 51%
- Median year built
- 1965
- Canton: 1986
- Switzerland: 1975
About Aarau
Aarau ranks 2nd of 196 municipalities in the canton of Aargau by number of parcels and holds 1.6% of the canton's parcels on 0.9% of its area. The median parcel in Aarau measures 668 m², smaller than the canton median of 861 m². Aarau is more built-up than the canton as a whole: 77.1% of its parcels have a building, against 55.2% across the canton.
The zones with the most parcels are Zone Wohnen zweigeschossig (21.8%), Zone Wohnen dreigeschossig (15.3%) and Zone Gartenstadt zweigeschossig (10.6%). In total, Aarau uses 31 zone designations.
According to the building register, Aarau has 6’275 buildings with 12’707 dwellings, 2.0 dwellings per building on average. Residential buildings mix single-family houses and buildings with several dwellings: single-family houses make up 59.5% of them. Non-residential buildings account for 36.5% of all buildings.
Built parcels most often have their newest building from 1961 to 1980 (18.3% of them), and 19% have one from 2001 or later. The median year built, 1965, is earlier than in the canton as a whole (1986).
Built and unbuilt parcels
Built: 3’723 (77.1%)
Unbuilt: 1’108 (22.9%)
Parcels by zone
| Zone | Parcels | Area | Built |
|---|---|---|---|
| Zone Wohnen zweigeschossig | 1’051 | 0.76 km² | 87.3% |
| Zone Wohnen dreigeschossig | 737 | 0.79 km² | 84.8% |
| Zone Gartenstadt zweigeschossig | 512 | 0.41 km² | 89.5% |
| Zone Gartenstadt dreigeschossig | 445 | 0.38 km² | 89.7% |
| Zone Arbeiten und Wohnen dreigeschossig | 257 | 0.26 km² | 79.8% |
| Zone Altstadt A | 218 | 0.06 km² | 69.7% |
| Zone Arbeiten und Wohnen fünfgeschossig | 181 | 0.52 km² | 77.9% |
| Zone Landwirtschaft | 176 | 1.18 km² | 13.1% |
| Zone Wohnen differenziert | 169 | 0.31 km² | 78.1% |
| Zone Öffentliche Nutzung | 138 | 1.12 km² | 73.2% |
| Zone Altstadt B | 125 | 0.03 km² | 70.4% |
| Zone Freiraum | 107 | 0.50 km² | 42.1% |
| Other zones (19 labels) | 715 | 6.02 km² | 61.1% |
Zone names are the municipal designations. A canton lists each wording separately.
Building stock
The building register lists 6’275 buildings with 12’707 dwellings here; 2’134 of them are single-family houses.
- Buildings
- 6’275
- Dwellings
- 12’707
- Single-family houses
- 2’134
- Building volume
- 12.5 million m³
Buildings by category
Construction periods
Built parcels by construction period of their newest building
Maps and geodata for Aarau
geopool works as a GIS and geoportal for Aarau. 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.