Knonau: observed built density
Municipality in the canton of Zurich · FSO no. 7 · Parcel data as of July 2025
- Parcels
- 1’027
< 1 % of the canton
- Municipal zones
- 16
- Median utilization
- 10 %
Canton: 40 %
Switzerland: 10 %
- Median GFZ
- 0.09
Canton: 0.22
Switzerland: 0.09
- Median height
- 10.6 m
Canton: 10.5 m
Switzerland: 9.5 m
- Median floors
- 2.8
Canton: 2.8
Switzerland: 2.3
About Knonau
Knonau is a municipality in the canton of Zurich. The parcel data lists 1’027 parcels in 16 municipal zone types. The zone types with the most parcels are Kantonale Landwirtschaftszone (299), Kernzone D (149) and Wohnzone 2/40 (136).
The median parcel is built to a volume utilization of 10 %; half of the parcels lie between 5 % and 94 %. The canton median is 40 %, so Knonau sits below it.
The median building height is 10.6 m at 2.8 floors, and the median floor-area ratio (GFZ) is 0.09. Parcels built in the last 20 years reach a mean volume utilization of 124 % (172 parcels), higher than the 62 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Kantonale Landwirtschaftszone | 299 | 0 % |
| Kernzone D | 149 | 64 % |
| Wohnzone 2/40 | 136 | 91 % |
| Wohnzone 2/35 | 132 | 75 % |
| Wald | 112 | 0 % |
| Wohnzone 1/20 | 75 | 89 % |
| Kernzone W | 41 | 87 % |
| Gewerbezone | 20 | 197 % |
| Wohnzone G3/60 | 16 | 47 % |
| Zone für öffentliche Bauten B | 16 | 17 % |
| Gewässer | 9 | 0 % |
| Erholungszone für Sport und Freizeit | 7 | 0 % |
| Other zones (4) | 15 | - |
Volume utilization (ratioV)
Of the 1’013 parcels with a value, half lie between 5 % and 94 %. The median is 10 % and the mean 58 %.
Share of parcels by range
- below 50 %57 %
- 50 % to below 100 %21 %
- 100 % to below 150 %14 %
- 150 % and above8 %
Floor-area ratio (GFZ)
Of the 1’013 parcels with a value, half lie between 0.05 and 0.62. The median is 0.09 and the mean 0.32.
Share of parcels by range
- below 0.5067 %
- 0.50 to below 1.0024 %
- 1.00 to below 1.508 %
- 1.50 and above1 %
Building height
Of the 499 parcels with a value, half lie between 9.0 m and 11.8 m. The median is 10.6 m and the mean 10.6 m.
Share of parcels by range
- below 8 m11 %
- 8 m to below 12 m67 %
- 12 m to below 20 m22 %
- 20 m and above0 %
Number of floors
Of the 373 parcels with a value, half lie between 2.1 and 3.2. The median is 2.8 and the mean 2.7.
Share of parcels by range
- below 26 %
- 2 to below 330 %
- 3 to below 561 %
- 5 and above3 %
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 | 1’027 | 62 % |
| Last 60 years | 426 | 117 % |
| Last 40 years | 336 | 115 % |
| Last 20 years | 172 | 124 % |
| Last 15 years | 111 | 131 % |
| Last 10 years | 78 | 130 % |
| Last 5 years | 14 | 115 % |
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).