Birrhard: observed built density
Municipality in the canton of Aargau · FSO no. 4093 · Parcel data as of July 2025
- Parcels
- 569
< 1 % of the canton
- Municipal zones
- 13
- Median utilization
- 42 %
Canton: 35 %
Switzerland: 10 %
- Median GFZ
- 0.19
Canton: 0.13
Switzerland: 0.09
- Median height
- 8.9 m
Canton: 9.3 m
Switzerland: 9.5 m
- Median floors
- 2.2
Canton: 2.2
Switzerland: 2.3
About Birrhard
Birrhard is a municipality in the canton of Aargau. The parcel data lists 569 parcels in 13 municipal zone types. The zone types with the most parcels are Wohnzone 2 Geschosse (190), Landwirtschaftszone (134) and Dorfzone (130).
The median parcel is built to a volume utilization of 42 %; half of the parcels lie between 5 % and 101 %. The canton median is 35 %, so Birrhard sits above it.
The median building height is 8.9 m at 2.2 floors, and the median floor-area ratio (GFZ) is 0.19. Parcels built in the last 20 years reach a mean volume utilization of 113 % (87 parcels), higher than the 62 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Wohnzone 2 Geschosse | 190 | 94 % |
| Landwirtschaftszone | 134 | 0 % |
| Dorfzone | 130 | 78 % |
| Wald | 82 | 0 % |
| Arbeitszone I | 10 | 55 % |
| Kantonsstrasse | 8 | 0 % |
| Zone für öffentliche Bauten und Anlagen | 4 | 68 % |
| Arbeitszone II | 3 | 0 % |
| Kommunale Strasse neben Autobahn | 3 | 0 % |
| Autobahn | 2 | 50 % |
| Gewässer | 1 | 0 % |
| Grünzone | 1 | 0 % |
| Other zones (1) | 1 | - |
Volume utilization (ratioV)
Of the 560 parcels with a value, half lie between 5 % and 101 %. The median is 42 % and the mean 59 %.
Share of parcels by range
- below 50 %52 %
- 50 % to below 100 %22 %
- 100 % to below 150 %16 %
- 150 % and above9 %
Floor-area ratio (GFZ)
Of the 560 parcels with a value, half lie between 0.05 and 0.52. The median is 0.19 and the mean 0.32.
Share of parcels by range
- below 0.5073 %
- 0.50 to below 1.0021 %
- 1.00 to below 1.505 %
- 1.50 and above1 %
Building height
Of the 277 parcels with a value, half lie between 7.3 m and 10.4 m. The median is 8.9 m and the mean 8.9 m.
Share of parcels by range
- below 8 m34 %
- 8 m to below 12 m60 %
- 12 m to below 20 m6 %
- 20 m and above0 %
Number of floors
Of the 249 parcels with a value, half lie between 1.7 and 2.8. The median is 2.2 and the mean 2.2.
Share of parcels by range
- below 217 %
- 2 to below 347 %
- 3 to below 535 %
- 5 and above1 %
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 | 569 | 62 % |
| Last 60 years | 257 | 105 % |
| Last 40 years | 167 | 111 % |
| Last 20 years | 87 | 113 % |
| Last 15 years | 65 | 122 % |
| Last 10 years | 47 | 133 % |
| Last 5 years | 28 | 139 % |
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).