Wettswil am Albis: observed built density
Municipality in the canton of Zurich · FSO no. 14 · Parcel data as of July 2025
- Parcels
- 1’553
< 1 % of the canton
- Municipal zones
- 14
- Median utilization
- 62 %
Canton: 40 %
Switzerland: 10 %
- Median GFZ
- 0.39
Canton: 0.22
Switzerland: 0.09
- Median height
- 9.0 m
Canton: 10.5 m
Switzerland: 9.5 m
- Median floors
- 2.4
Canton: 2.8
Switzerland: 2.3
About Wettswil am Albis
Wettswil am Albis is a municipality in the canton of Zurich. The parcel data lists 1’553 parcels in 14 municipal zone types. The zone types with the most parcels are Wohnzone 2A (593), Wohnzone 1 (321) and Wohnzone 2B (223).
The median parcel is built to a volume utilization of 62 %; half of the parcels lie between 7 % and 93 %. The canton median is 40 %, so Wettswil am Albis sits above it.
The median building height is 9.0 m at 2.4 floors, and the median floor-area ratio (GFZ) is 0.39. Parcels built in the last 20 years reach a mean volume utilization of 113 % (155 parcels), higher than the 62 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Wohnzone 2A | 593 | 74 % |
| Wohnzone 1 | 321 | 63 % |
| Wohnzone 2B | 223 | 83 % |
| Kantonale Landwirtschaftszone | 134 | 0 % |
| Kernzone | 94 | 67 % |
| Wald | 60 | 0 % |
| Wohnzone 3 | 43 | 71 % |
| Freihaltezone | 36 | 0 % |
| Gewerbezone | 23 | 63 % |
| Zone für öffentliche Bauten | 14 | 0 % |
| Erholungszone Ättenberg | 4 | 8 % |
| Bahnareal | 3 | 0 % |
| Other zones (2) | 5 | - |
Volume utilization (ratioV)
Of the 1’535 parcels with a value, half lie between 7 % and 93 %. The median is 62 % and the mean 60 %.
Share of parcels by range
- below 50 %41 %
- 50 % to below 100 %38 %
- 100 % to below 150 %15 %
- 150 % and above6 %
Floor-area ratio (GFZ)
Of the 1’535 parcels with a value, half lie between 0.07 and 0.62. The median is 0.39 and the mean 0.40.
Share of parcels by range
- below 0.5063 %
- 0.50 to below 1.0030 %
- 1.00 to below 1.505 %
- 1.50 and above1 %
Building height
Of the 984 parcels with a value, half lie between 7.6 m and 10.3 m. The median is 9.0 m and the mean 9.1 m.
Share of parcels by range
- below 8 m29 %
- 8 m to below 12 m62 %
- 12 m to below 20 m9 %
- 20 m and above0 %
Number of floors
Of the 852 parcels with a value, half lie between 1.9 and 3.1. The median is 2.4 and the mean 2.5.
Share of parcels by range
- below 26 %
- 2 to below 348 %
- 3 to below 544 %
- 5 and above2 %
Building age cohorts
Mean volume utilization of the parcels built inside each window, from all years on record down to the last five. The windows overlap: the last 20 years include the last 5.
| Built in | Parcels | Mean utilization |
|---|---|---|
| All years | 1’553 | 62 % |
| Last 60 years | 949 | 86 % |
| Last 40 years | 450 | 96 % |
| Last 20 years | 155 | 113 % |
| Last 15 years | 127 | 115 % |
| Last 10 years | 73 | 127 % |
| Last 5 years | 18 | 118 % |
Open the map at Wettswil am Albis
How to read this page
room shows observed built density: what has been built on the parcels, not what the zoning permits. Volume utilization (ratioV) compares the built volume of a parcel with the reference volume of its municipal zone type. The floor-area ratio (GFZ) is floor area divided by parcel area; building height and number of floors are taken from the buildings on a parcel. Figures pool all municipal zones of the area. Medians and quartiles are read from bins 10 points (ratioV), 0.1 (GFZ), 2 m (height) and 1 floor wide, so they are exact to within one bin; means are exact. A parcel counts in a distribution only when the parcel data has a value for it. The floors distribution leaves out parcels without a building (0 floors).