Unterkulm: observed built density
Municipality in the canton of Aargau · FSO no. 4146 · Parcel data as of July 2025
- Parcels
- 1’702
1 % of the canton
- Municipal zones
- 16
- Median utilization
- 19 %
Canton: 35 %
Switzerland: 10 %
- Median GFZ
- 0.09
Canton: 0.13
Switzerland: 0.09
- Median height
- 9.4 m
Canton: 9.3 m
Switzerland: 9.5 m
- Median floors
- 2.1
Canton: 2.2
Switzerland: 2.3
About Unterkulm
Unterkulm is a municipality in the canton of Aargau. The parcel data lists 1’702 parcels in 16 municipal zone types. The zone types with the most parcels are Wohnzone 2 (611), Landwirtschaftszone (562) and Wald (238).
The median parcel is built to a volume utilization of 19 %; half of the parcels lie between 5 % and 100 %. The canton median is 35 %, so Unterkulm sits below it.
The median building height is 9.4 m at 2.1 floors, and the median floor-area ratio (GFZ) is 0.09. Parcels built in the last 20 years reach a mean volume utilization of 112 % (146 parcels), higher than the 68 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Wohnzone 2 | 611 | 94 % |
| Landwirtschaftszone | 562 | 0 % |
| Wald | 238 | 0 % |
| Kernzone | 130 | 86 % |
| Wohnzone 3 | 69 | 54 % |
| Wohn- und Arbeitszone 3 | 26 | 80 % |
| Arbeitszone II | 20 | 62 % |
| Zone für öffentliche Bauten und Anlagen | 20 | 154 % |
| Uferschutzzone | 10 | 26 % |
| Arbeitszone I | 5 | 0 % |
| Naturschutzzone / Magerwiese (trocken) | 3 | 0 % |
| Verkehrsflächen innerhalb Bauzonen | 3 | 0 % |
| Other zones (4) | 5 | - |
Volume utilization (ratioV)
Of the 1’684 parcels with a value, half lie between 5 % and 100 %. The median is 19 % and the mean 62 %.
Share of parcels by range
- below 50 %55 %
- 50 % to below 100 %20 %
- 100 % to below 150 %15 %
- 150 % and above11 %
Floor-area ratio (GFZ)
Of the 1’684 parcels with a value, half lie between 0.05 and 0.41. The median is 0.09 and the mean 0.25.
Share of parcels by range
- below 0.5082 %
- 0.50 to below 1.0013 %
- 1.00 to below 1.503 %
- 1.50 and above2 %
Building height
Of the 828 parcels with a value, half lie between 8.0 m and 10.9 m. The median is 9.4 m and the mean 9.4 m.
Share of parcels by range
- below 8 m25 %
- 8 m to below 12 m65 %
- 12 m to below 20 m10 %
- 20 m and above< 1 %
Number of floors
Of the 598 parcels with a value, half lie between 1.7 and 2.6. The median is 2.1 and the mean 2.2.
Share of parcels by range
- below 213 %
- 2 to below 360 %
- 3 to below 526 %
- 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 | 1’702 | 68 % |
| Last 60 years | 533 | 116 % |
| Last 40 years | 352 | 122 % |
| Last 20 years | 146 | 112 % |
| Last 15 years | 108 | 116 % |
| Last 10 years | 71 | 112 % |
| Last 5 years | 29 | 113 % |
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).