Thalwil: observed built density
Municipality in the canton of Zurich · FSO no. 141 · Parcel data as of July 2025
- Parcels
- 2’974
1 % of the canton
- Municipal zones
- 21
- Median utilization
- 63 %
Canton: 40 %
Switzerland: 10 %
- Median GFZ
- 0.54
Canton: 0.22
Switzerland: 0.09
- Median height
- 11.8 m
Canton: 10.5 m
Switzerland: 9.5 m
- Median floors
- 3.0
Canton: 2.8
Switzerland: 2.3
About Thalwil
Thalwil is a municipality in the canton of Zurich. The parcel data lists 2’974 parcels in 21 municipal zone types. The zone types with the most parcels are Wohnzone 2 (899), Wohnzone 3 (381) and Wohnzone 1 (363).
The median parcel is built to a volume utilization of 63 %; half of the parcels lie between 8 % and 98 %. The canton median is 40 %, so Thalwil sits above it.
The median building height is 11.8 m at 3.0 floors, and the median floor-area ratio (GFZ) is 0.54. Parcels built in the last 20 years reach a mean volume utilization of 118 % (277 parcels), higher than the 68 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Wohnzone 2 | 899 | 68 % |
| Wohnzone 3 | 381 | 68 % |
| Wohnzone 1 | 363 | 65 % |
| Kernzone A | 290 | 81 % |
| Wohnzone G3 | 258 | 90 % |
| Kernzone B | 152 | 46 % |
| Erholungszone | 120 | 0 % |
| Wald | 79 | 0 % |
| Zentrumszone | 71 | 68 % |
| Gewerbezone | 64 | 39 % |
| Freihaltezone | 58 | 0 % |
| Wohnzone G2 | 44 | 75 % |
| Other zones (9) | 195 | - |
Volume utilization (ratioV)
Of the 2’947 parcels with a value, half lie between 8 % and 98 %. The median is 63 % and the mean 65 %.
Share of parcels by range
- below 50 %41 %
- 50 % to below 100 %35 %
- 100 % to below 150 %18 %
- 150 % and above5 %
Floor-area ratio (GFZ)
Of the 2’947 parcels with a value, half lie between 0.08 and 0.96. The median is 0.54 and the mean 0.60.
Share of parcels by range
- below 0.5048 %
- 0.50 to below 1.0030 %
- 1.00 to below 1.5017 %
- 1.50 and above6 %
Building height
Of the 2’026 parcels with a value, half lie between 9.7 m and 13.8 m. The median is 11.8 m and the mean 11.8 m.
Share of parcels by range
- below 8 m9 %
- 8 m to below 12 m43 %
- 12 m to below 20 m47 %
- 20 m and above1 %
Number of floors
Of the 1’727 parcels with a value, half lie between 2.4 and 3.8. The median is 3.0 and the mean 3.1.
Share of parcels by range
- below 24 %
- 2 to below 324 %
- 3 to below 565 %
- 5 and above7 %
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 | 2’974 | 68 % |
| Last 60 years | 1’198 | 96 % |
| Last 40 years | 752 | 104 % |
| Last 20 years | 277 | 118 % |
| Last 15 years | 187 | 108 % |
| Last 10 years | 124 | 112 % |
| Last 5 years | 50 | 108 % |
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).