Calanca: observed built density
Municipality in the canton of Graubünden · FSO no. 3837 · Parcel data as of July 2025
- Parcels
- 2’294
1 % of the canton
- Municipal zones
- 34
- Median utilization
- 8 %
Canton: 8 %
Switzerland: 10 %
- Median GFZ
- 0.07
Canton: 0.08
Switzerland: 0.09
- Median height
- 7.1 m
Canton: 9.2 m
Switzerland: 9.5 m
- Median floors
- 1.6
Canton: 2.3
Switzerland: 2.3
About Calanca
Calanca is a municipality in the canton of Graubünden. The parcel data lists 2’294 parcels in 34 municipal zone types. The zone types with the most parcels are Zona agricola (865), Zona forestale (596) and Zona nucleo (148).
The median parcel is built to a volume utilization of 8 %; half of the parcels lie between 4 % and 59 %. The canton median is 8 %, close to the level of Calanca.
The median building height is 7.1 m at 1.6 floors, and the median floor-area ratio (GFZ) is 0.07. Parcels built in the last 20 years reach a mean volume utilization of 110 % (37 parcels), lower than the 316 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Zona agricola | 865 | 0 % |
| Zona forestale | 596 | 0 % |
| Zona nucleo | 148 | 63 % |
| Altro territorio comunale | 114 | 0 % |
| Area boschiva | 95 | 0 % |
| Zona nucleo tradizionale | 53 | 114 % |
| Zona di conservazione | 49 | 68 % |
| Zona residenziale estensiva | 46 | 58 % |
| Nucleo del villaggio | 39 | 81 % |
| Zona ampliamento nucleo 2 | 38 | 0 % |
| Zona residenziale a 2 piani | 38 | 46 % |
| Zona d'estrazione di materiali | 36 | 0 % |
| Other zones (22) | 177 | - |
Volume utilization (ratioV)
Of the 2’259 parcels with a value, half lie between 4 % and 59 %. The median is 8 % and the mean 201 %.
Share of parcels by range
- below 50 %73 %
- 50 % to below 100 %9 %
- 100 % to below 150 %6 %
- 150 % and above12 %
Floor-area ratio (GFZ)
Of the 2’258 parcels with a value, half lie between 0.03 and 0.10. The median is 0.07 and the mean 0.11.
Share of parcels by range
- below 0.5092 %
- 0.50 to below 1.006 %
- 1.00 to below 1.502 %
- 1.50 and above< 1 %
Building height
Of the 739 parcels with a value, half lie between 6.1 m and 8.2 m. The median is 7.1 m and the mean 7.2 m.
Share of parcels by range
- below 8 m73 %
- 8 m to below 12 m26 %
- 12 m to below 20 m1 %
- 20 m and above0 %
Number of floors
Of the 398 parcels with a value, half lie between 1.1 and 2.1. The median is 1.6 and the mean 1.6.
Share of parcels by range
- below 244 %
- 2 to below 349 %
- 3 to below 57 %
- 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 | 2’294 | 316 % |
| Last 60 years | 225 | 261 % |
| Last 40 years | 130 | 232 % |
| Last 20 years | 37 | 110 % |
| Last 15 years | 21 | 115 % |
| Last 10 years | 12 | 140 % |
| Last 5 years | 5 | 98 % |
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).