Therwil
Municipality in the canton of Basel-Landschaft · FSO no. 2775
Parcel data from Nov 2026, statistics computed on 29 Oct 2026.
Open map at the Therwil centerThe parcel data lists 4’030 parcels in Therwil, covering 7.7 km². 65% of them have at least one registered building. The median parcel measures 443 m².
Key figures
- Parcels
- 4’030
- 3.1% of the canton
- Total area
- 7.7 km²
- 1.5% of the canton
- Median area
- 443 m²
- Canton: 702 m²
- Switzerland: 881 m²
- Built share
- 65%
- Canton: 56.6%
- Switzerland: 51%
- Median year built
- 1979
- Canton: 1979
- Switzerland: 1975
About Therwil
Therwil ranks 4th of 86 municipalities in the canton of Basel-Landschaft by number of parcels and holds 3.1% of the canton's parcels on 1.5% of its area. The median parcel in Therwil measures 443 m², smaller than the canton median of 702 m². Therwil is more built-up than the canton as a whole: 65% of its parcels have a building, against 56.6% across the canton.
The zones with the most parcels are W2 (33%), W1 (19.7%) and Landwirtschaftszone (11.4%). In total, Therwil uses 40 zone designations.
According to the building register, Therwil has 3’677 buildings with 4’898 dwellings, 1.3 dwellings per building on average. Most residential buildings are single-family houses (80.4%). Non-residential buildings account for 23.3% of all buildings.
Built parcels most often have their newest building from 1961 to 1980 (42.4% of them), and 17.2% have one from 2001 or later. The median year built, 1979, is the same as in the canton as a whole.
Built and unbuilt parcels
Built: 2’618 (65%)
Unbuilt: 1’412 (35%)
Parcels by zone
| Zone | Parcels | Area | Built |
|---|---|---|---|
| W2 | 1’331 | 0.50 km² | 87.5% |
| W1 | 793 | 0.46 km² | 86.5% |
| Landwirtschaftszone | 460 | 3.57 km² | 13.9% |
| WG2 | 274 | 0.15 km² | 88.7% |
| Wald | 231 | 1.66 km² | 3.0% |
| Strasse innerhalb ZPS | 201 | 0.24 km² | 3.5% |
| Wohnzonen | 192 | 0.11 km² | 94.3% |
| Strasse ausserhalb ZPS | 145 | 0.18 km² | 0.7% |
| Kernzone | 71 | 0.04 km² | 88.7% |
| W2a | 37 | 0.01 km² | 86.5% |
| Zone für öffentliche Werke und Anlagen | 36 | 0.19 km² | 72.2% |
| 2. Ausbauetappe | 34 | 0.08 km² | 0.0% |
| Other zones (28 labels) | 225 | 0.47 km² | 63.6% |
Zone names are the municipal designations. A canton lists each wording separately.
Building stock
The building register lists 3’677 buildings with 4’898 dwellings here; 1’910 of them are single-family houses.
- Buildings
- 3’677
- Dwellings
- 4’898
- Single-family houses
- 1’910
- Building volume
- 3.4 million m³
Buildings by category
Construction periods
Built parcels by construction period of their newest building
Maps and geodata for Therwil
geopool works as a GIS and geoportal for Therwil. 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.
More municipalities in the canton of Basel-Landschaft
- Aesch (BL)3’374 parcels
- Allschwil5’096 parcels
- Binningen3’436 parcels
- Ettingen2’615 parcels
- Gelterkinden3’054 parcels
- Laufen2’568 parcels
- Liestal3’981 parcels
- Münchenstein3’513 parcels
- Muttenz4’953 parcels
- Oberwil (BL)3’696 parcels
- Pratteln4’002 parcels
- Reinach (BL)5’931 parcels