Holderbank (SO): observed built density
Municipality in the canton of Solothurn · FSO no. 2425 · Parcel data as of July 2025
- Parcels
- 550
< 1 % of the canton
- Municipal zones
- 16
- Median utilization
- 10 %
Canton: 29 %
Switzerland: 10 %
- Median GFZ
- 0.09
Canton: 0.10
Switzerland: 0.09
- Median height
- 9.4 m
Canton: 9.2 m
Switzerland: 9.5 m
- Median floors
- 2.2
Canton: 2.2
Switzerland: 2.3
About Holderbank (SO)
Holderbank (SO) is a municipality in the canton of Solothurn. The parcel data lists 550 parcels in 16 municipal zone types. The zone types with the most parcels are Landwirtschaftszone (201), Wohnzone 2-geschossig (181) and Kernzone (50).
The median parcel is built to a volume utilization of 10 %; half of the parcels lie between 5 % and 100 %. The canton median is 29 %, so Holderbank (SO) sits below it.
The median building height is 9.4 m at 2.2 floors, and the median floor-area ratio (GFZ) is 0.09. Parcels built in the last 20 years reach a mean volume utilization of 121 % (41 parcels), lower than the 286 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Landwirtschaftszone | 201 | 0 % |
| Wohnzone 2-geschossig | 181 | 80 % |
| Kernzone | 50 | 95 % |
| Wald | 42 | 0 % |
| Verkehrszone Strasse | 26 | 0 % |
| Verkehrsfläche Strasse | 18 | 0 % |
| Reine Gewerbezone | 7 | 66 % |
| Gewässer | 5 | 0 % |
| Wohnzone 3-geschossig | 5 | 108 % |
| Reservezone Wohnzone, Mischzone, Kernzone und Zentrumszone | 4 | 0 % |
| Zone für öffentliche Bauten und Anlagen | 4 | 2’714 % |
| Reservezone Arbeiten | 2 | 0 % |
| Other zones (4) | 5 | - |
Volume utilization (ratioV)
Of the 539 parcels with a value, half lie between 5 % and 100 %. The median is 10 % and the mean 239 %.
Share of parcels by range
- below 50 %56 %
- 50 % to below 100 %19 %
- 100 % to below 150 %13 %
- 150 % and above12 %
Floor-area ratio (GFZ)
Of the 539 parcels with a value, half lie between 0.04 and 0.39. The median is 0.09 and the mean 0.22.
Share of parcels by range
- below 0.5084 %
- 0.50 to below 1.0013 %
- 1.00 to below 1.502 %
- 1.50 and above1 %
Building height
Of the 255 parcels with a value, half lie between 8.1 m and 10.9 m. The median is 9.4 m and the mean 9.4 m.
Share of parcels by range
- below 8 m22 %
- 8 m to below 12 m67 %
- 12 m to below 20 m11 %
- 20 m and above0 %
Number of floors
Of the 198 parcels with a value, half lie between 1.8 and 2.6. The median is 2.2 and the mean 2.2.
Share of parcels by range
- below 26 %
- 2 to below 367 %
- 3 to below 527 %
- 5 and above0 %
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 | 550 | 286 % |
| Last 60 years | 141 | 516 % |
| Last 40 years | 97 | 408 % |
| Last 20 years | 41 | 121 % |
| Last 15 years | 31 | 113 % |
| Last 10 years | 20 | 105 % |
| Last 5 years | 13 | 96 % |
Open the map at Holderbank (SO)
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).