Ferrera: observed built density
Municipality in the canton of Graubünden · FSO no. 3713 · Parcel data as of July 2025
- Parcels
- 581
< 1 % of the canton
- Municipal zones
- 7
- 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
- 1.8
Canton: 2.3
Switzerland: 2.3
About Ferrera
Ferrera is a municipality in the canton of Graubünden. The parcel data lists 581 parcels in 7 municipal zone types. The zone types with the most parcels are Landwirtschaftszone (287), Dorfzone (115) and Wald (87).
The median parcel is built to a volume utilization of 8 %; half of the parcels lie between 4 % and 134 %. The canton median is 8 %, close to the level of Ferrera.
The median building height is 7.1 m at 1.8 floors, and the median floor-area ratio (GFZ) is 0.07.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Landwirtschaftszone | 287 | 0 % |
| Dorfzone | 115 | 131 % |
| Wald | 87 | 0 % |
| Erhaltungszone | 47 | 137 % |
| Zone übriges Gemeindegebiet | 28 | 0 % |
| Zone übriges Gemeindegebiet (Gewässer) | 9 | 0 % |
| Zone für öffentliche Bauten und Anlagen | 8 | 80 % |
Volume utilization (ratioV)
Of the 574 parcels with a value, half lie between 4 % and 134 %. The median is 8 % and the mean 603 %.
Share of parcels by range
- below 50 %65 %
- 50 % to below 100 %4 %
- 100 % to below 150 %8 %
- 150 % and above23 %
Floor-area ratio (GFZ)
Of the 574 parcels with a value, half lie between 0.04 and 0.24. The median is 0.07 and the mean 0.16.
Share of parcels by range
- below 0.5087 %
- 0.50 to below 1.0010 %
- 1.00 to below 1.502 %
- 1.50 and above1 %
Building height
Of the 225 parcels with a value, half lie between 6.1 m and 8.3 m. The median is 7.1 m and the mean 7.2 m.
Share of parcels by range
- below 8 m72 %
- 8 m to below 12 m28 %
- 12 m to below 20 m1 %
- 20 m and above0 %
Number of floors
Of the 113 parcels with a value, half lie between 1.2 and 2.3. The median is 1.8 and the mean 1.8.
Share of parcels by range
- below 235 %
- 2 to below 350 %
- 3 to below 514 %
- 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 | 581 | 844 % |
| Last 60 years | 68 | 3’146 % |
| Last 40 years | 36 | 2’444 % |
| Last 20 years | 10 | 109 % |
| Last 15 years | 4 | 91 % |
| Last 10 years | 1 | 100 % |
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).