Val-d'Illiez: observed built density
Municipality in the canton of Valais · FSO no. 6157 · 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
- 2’541
< 1 % of the canton
- Municipal zones
- 43
- Median utilization
- 20 %
Canton: 7 %
Switzerland: 10 %
- Median GFZ
- 0.09
Canton: 0.07
Switzerland: 0.09
- Median height
- 9.2 m
Canton: 8.4 m
Switzerland: 9.5 m
- Median floors
- 2.4
Canton: 2.3
Switzerland: 2.3
About Val-d'Illiez
Val-d'Illiez is a municipality in the canton of Valais. The parcel data lists 2’541 parcels in 43 municipal zone types. The zone types with the most parcels are Zone de chalets (505), ZONE AGRICOLE DE LA VALLEE (403) and AIRE FORESTIERE (331).
The median parcel is built to a volume utilization of 20 %; half of the parcels lie between 5 % and 108 %. The canton median is 7 %, so Val-d'Illiez sits above it.
The median building height is 9.2 m at 2.4 floors, and the median floor-area ratio (GFZ) is 0.09. Parcels built in the last 20 years reach a mean volume utilization of 196 % (389 parcels), higher than the 140 % across all building years.
Parcels by municipal zone
| Zone | Parcels | Median utilization |
|---|---|---|
| Zone de chalets | 505 | 78 % |
| ZONE AGRICOLE DE LA VALLEE | 403 | 0 % |
| AIRE FORESTIERE | 331 | 0 % |
| ZONE AGRICOLE D'ALPAGE ET DE PATURAGE | 314 | 1 % |
| Zone agricole des Rives de la Vièze | 219 | 0 % |
| Zone de chalets à aménager | 127 | 73 % |
| Zone du centre | 77 | 122 % |
| Zone d'extension du village | 74 | 75 % |
| Zone de faible densité à aménager | 68 | 59 % |
| Aire forestière | 49 | 0 % |
| Zone du village | 46 | 74 % |
| Zone résidentielle | 45 | 75 % |
| Other zones (30) | 283 | - |
Volume utilization (ratioV)
Of the 2’494 parcels with a value, half lie between 5 % and 108 %. The median is 20 % and the mean 123 %.
Share of parcels by range
- below 50 %56 %
- 50 % to below 100 %16 %
- 100 % to below 150 %12 %
- 150 % and above16 %
Floor-area ratio (GFZ)
Of the 2’494 parcels with a value, half lie between 0.04 and 0.30. The median is 0.09 and the mean 0.19.
Share of parcels by range
- below 0.5090 %
- 0.50 to below 1.007 %
- 1.00 to below 1.501 %
- 1.50 and above1 %
Building height
Of the 1’257 parcels with a value, half lie between 7.9 m and 10.8 m. The median is 9.2 m and the mean 9.4 m.
Share of parcels by range
- below 8 m26 %
- 8 m to below 12 m65 %
- 12 m to below 20 m9 %
- 20 m and above< 1 %
Number of floors
Of the 1’116 parcels with a value, half lie between 1.8 and 3.0. The median is 2.4 and the mean 2.4.
Share of parcels by range
- below 212 %
- 2 to below 341 %
- 3 to below 546 %
- 5 and above2 %
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 | 2’541 | 140 % |
| Last 60 years | 952 | 204 % |
| Last 40 years | 690 | 208 % |
| Last 20 years | 389 | 196 % |
| Last 15 years | 306 | 197 % |
| Last 10 years | 75 | 113 % |
| Last 5 years | 40 | 101 % |
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).