Riederalp: observed built density
Municipality in the canton of Valais · FSO no. 6181 · Parcel data as of July 2025
The parcel data covers only part of the land in the canton of Valais, so figures here may be incomplete.
- Parcels
- 2’785
< 1 % of the canton
- Municipal zones
- 38
- Median utilization
- 7 %
Canton: 7 %
Switzerland: 10 %
- Median GFZ
- 0.07
Canton: 0.07
Switzerland: 0.09
- Median height
- 8.8 m
Canton: 8.4 m
Switzerland: 9.5 m
- Median floors
- 2.5
Canton: 2.3
Switzerland: 2.3
About Riederalp
Riederalp is a municipality in the canton of Valais. The parcel data lists 2’785 parcels in 38 municipal zone types. The zone types with the most parcels are Landwirtsschaftszone 2. Priorität (inkl. Sömmerungs-und Alpweiden) (782), Wohnzone W2 (553) and Landwirtschaftszone 1. Priorität (248).
The median parcel is built to a volume utilization of 7 %; half of the parcels lie between 4 % and 73 %. The canton median is 7 %, so Riederalp sits above it.
The median building height is 8.8 m at 2.5 floors, and the median floor-area ratio (GFZ) is 0.07. Parcels built in the last 20 years reach a mean volume utilization of 174 % (205 parcels), higher than the 121 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Landwirtsschaftszone 2. Priorität (inkl. Sömmerungs-und Alpweiden) | 782 | 0 % |
| Wohnzone W2 | 553 | 67 % |
| Landwirtschaftszone 1. Priorität | 248 | 0 % |
| Wald | 240 | 0 % |
| Dorfzone D | 228 | 80 % |
| Verkehr/Zone für Verkehrsanlagen | 165 | 0 % |
| Wohnzone W3 | 115 | 58 % |
| Wohnzone W1A | 72 | 0 % |
| Dorfzone | 68 | 164 % |
| Geschützte Landwirtschaftszone | 51 | 0 % |
| Erhaltungszone | 36 | 123 % |
| Wohnzone W2 Plus | 25 | 0 % |
| Other zones (26) | 202 | - |
Volume utilization (ratioV)
Of the 2’745 parcels with a value, half lie between 4 % and 73 %. The median is 7 % and the mean 104 %.
Share of parcels by range
- below 50 %72 %
- 50 % to below 100 %7 %
- 100 % to below 150 %8 %
- 150 % and above12 %
Floor-area ratio (GFZ)
Of the 2’745 parcels with a value, half lie between 0.04 and 0.31. The median is 0.07 and the mean 0.22.
Share of parcels by range
- below 0.5081 %
- 0.50 to below 1.0012 %
- 1.00 to below 1.505 %
- 1.50 and above2 %
Building height
Of the 897 parcels with a value, half lie between 7.2 m and 10.4 m. The median is 8.8 m and the mean 9.1 m.
Share of parcels by range
- below 8 m37 %
- 8 m to below 12 m52 %
- 12 m to below 20 m12 %
- 20 m and above< 1 %
Number of floors
Of the 533 parcels with a value, half lie between 1.9 and 3.2. The median is 2.5 and the mean 2.6.
Share of parcels by range
- below 29 %
- 2 to below 342 %
- 3 to below 545 %
- 5 and above3 %
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 | 2’785 | 121 % |
| Last 60 years | 730 | 366 % |
| Last 40 years | 357 | 226 % |
| Last 20 years | 205 | 174 % |
| Last 15 years | 162 | 185 % |
| Last 10 years | 20 | 75 % |
| Last 5 years | 11 | 77 % |
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).