Riaz: observed built density
Municipality in the canton of Fribourg · FSO no. 2148 · Parcel data as of July 2025
The parcel data covers only part of the land in the canton of Fribourg, so figures here may be incomplete.
- Parcels
- 878
1 % of the canton
- Municipal zones
- 9
- Median utilization
- 82 %
Canton: 86 %
Switzerland: 10 %
- Median GFZ
- 0.34
Canton: 0.36
Switzerland: 0.09
- Median height
- 7.9 m
Canton: 8.9 m
Switzerland: 9.5 m
- Median floors
- 2.3
Canton: 2.3
Switzerland: 2.3
About Riaz
Riaz is a municipality in the canton of Fribourg. The parcel data lists 878 parcels in 9 municipal zone types. The zone types with the most parcels are Zone Résidentielle à faible densité (633), Zone de Centre (175) and Zone libre (23).
The median parcel is built to a volume utilization of 82 %; half of the parcels lie between 44 % and 113 %. The canton median is 86 %, close to the level of Riaz.
The median building height is 7.9 m at 2.3 floors, and the median floor-area ratio (GFZ) is 0.34. Parcels built in the last 20 years reach a mean volume utilization of 106 % (218 parcels), higher than the 85 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Zone Résidentielle à faible densité | 633 | 83 % |
| Zone de Centre | 175 | 83 % |
| Zone libre | 23 | 2 % |
| Zone d' Activités | 22 | 86 % |
| Zone Intérêt général 1 | 12 | 54 % |
| Zone Résidentielle à moyenne densité | 7 | 115 % |
| Zone de centre équestre | 3 | 33 % |
| Zone Intérêt général Il | 2 | 50 % |
| Zone en attente d'appobation | 1 | 0 % |
Volume utilization (ratioV)
Of the 864 parcels with a value, half lie between 44 % and 113 %. The median is 82 % and the mean 81 %.
Share of parcels by range
- below 50 %27 %
- 50 % to below 100 %38 %
- 100 % to below 150 %27 %
- 150 % and above8 %
Floor-area ratio (GFZ)
Of the 864 parcels with a value, half lie between 0.19 and 0.48. The median is 0.34 and the mean 0.35.
Share of parcels by range
- below 0.5079 %
- 0.50 to below 1.0019 %
- 1.00 to below 1.501 %
- 1.50 and above1 %
Building height
Of the 666 parcels with a value, half lie between 6.8 m and 9.4 m. The median is 7.9 m and the mean 8.3 m.
Share of parcels by range
- below 8 m53 %
- 8 m to below 12 m43 %
- 12 m to below 20 m4 %
- 20 m and above< 1 %
Number of floors
Of the 482 parcels with a value, half lie between 1.9 and 2.9. The median is 2.3 and the mean 2.4.
Share of parcels by range
- below 25 %
- 2 to below 353 %
- 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 | 878 | 85 % |
| Last 60 years | 583 | 101 % |
| Last 40 years | 456 | 105 % |
| Last 20 years | 218 | 106 % |
| Last 15 years | 158 | 115 % |
| Last 10 years | 92 | 128 % |
| Last 5 years | 16 | 104 % |
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).