Trun: observed built density
Municipality in the canton of Graubünden · FSO no. 3987 · Parcel data as of July 2025
- Parcels
- 2’899
1 % of the canton
- Municipal zones
- 35
- Median utilization
- 7 %
Canton: 8 %
Switzerland: 10 %
- Median GFZ
- 0.07
Canton: 0.08
Switzerland: 0.09
- Median height
- 8.9 m
Canton: 9.2 m
Switzerland: 9.5 m
- Median floors
- 2.2
Canton: 2.3
Switzerland: 2.3
About Trun
Trun is a municipality in the canton of Graubünden. The parcel data lists 2’899 parcels in 35 municipal zone types. The zone types with the most parcels are Zona d'agricultura (1’320), Zona da selvicultura (334) and Zona dil vitg (288).
The median parcel is built to a volume utilization of 7 %; half of the parcels lie between 4 % and 63 %. The canton median is 8 %, close to the level of Trun.
The median building height is 8.9 m at 2.2 floors, and the median floor-area ratio (GFZ) is 0.07. Parcels built in the last 20 years reach a mean volume utilization of 126 % (81 parcels), higher than the 82 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Zona d'agricultura | 1’320 | 0 % |
| Zona da selvicultura | 334 | 0 % |
| Zona dil vitg | 288 | 123 % |
| Landwirtschaftszone | 234 | 0 % |
| Zona d'adattaziun al vitg | 123 | 84 % |
| Ulteriur territori communal | 86 | 0 % |
| Dorfzone | 74 | 88 % |
| Zona d'habitar H2 | 60 | 101 % |
| Zona per baghetgs e stabiliments secundars | 42 | 0 % |
| Zona da mistregn | 41 | 89 % |
| Waldzone (Forstwirtschaftszone) | 39 | 0 % |
| Zona verda | 39 | 0 % |
| Other zones (23) | 219 | - |
Volume utilization (ratioV)
Of the 2’857 parcels with a value, half lie between 4 % and 63 %. The median is 7 % and the mean 71 %.
Share of parcels by range
- below 50 %73 %
- 50 % to below 100 %6 %
- 100 % to below 150 %6 %
- 150 % and above14 %
Floor-area ratio (GFZ)
Of the 2’857 parcels with a value, half lie between 0.03 and 0.14. The median is 0.07 and the mean 0.23.
Share of parcels by range
- below 0.5084 %
- 0.50 to below 1.008 %
- 1.00 to below 1.504 %
- 1.50 and above5 %
Building height
Of the 1’013 parcels with a value, half lie between 7.3 m and 10.6 m. The median is 8.9 m and the mean 9.0 m.
Share of parcels by range
- below 8 m34 %
- 8 m to below 12 m56 %
- 12 m to below 20 m10 %
- 20 m and above< 1 %
Number of floors
Of the 463 parcels with a value, half lie between 1.4 and 3.0. The median is 2.2 and the mean 2.2.
Share of parcels by range
- below 229 %
- 2 to below 328 %
- 3 to below 541 %
- 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 | 2’899 | 82 % |
| Last 60 years | 316 | 150 % |
| Last 40 years | 223 | 147 % |
| Last 20 years | 81 | 126 % |
| Last 15 years | 55 | 115 % |
| Last 10 years | 29 | 114 % |
| Last 5 years | 18 | 96 % |
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).