Aarau
Municipality in the canton of Aargau · FSO no. 4001
Parcel data from Jul 2025, statistics computed on 26 Sept 2026.
The 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: 863 m²
Switzerland: 870 m²
- Built share
- 77.1%
Canton: 55.4%
Switzerland: 52%
- Median year built
- 1965
Canton: 1986
Switzerland: 1976
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 in the data, on 0.9% of their area. The median parcel in Aarau measures 668 m², smaller than the canton median of 863 m². Aarau is more built-up than the canton as a whole: 77.1% of its parcels have a building, against 55.4% 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 6’271 buildings with 12’698 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 6’271 buildings with 12’698 dwellings here; 2’130 of them are single-family houses.
- Buildings
- 6’271
- Dwellings
- 12’698
- Single-family houses
- 2’130
- Building volume
- 12.5 million m³
Buildings by category
Construction periods
Built parcels by construction period of their newest buildingMaps 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.
Explore more data for Aarau
- Building zones and density Aarauin room
- ÖREB extract Aarauin lookup
- Building age Aarauin roots
- Building heights and headroom Aarauin roofs
- Solar potential Aarauin soolar
- Points of interest and accessibility Aarauin scoore
- Tax rates Aarauin taxoo