Onex: building age and utilization
Canton of Geneva · 1'596 parcels in municipal zones · Parcel data of September 2026
- Parcels in zones
- 1'596
- Municipal zones
- 8
- Median utilization (ratioV)
- 79%
- Newest building from 2006 or later
- 15%
- Median building height
- 8.7 m
- Median floors
- 2.2
Overview
Onex: the parcel data lists 1'596 parcels in 8 municipal zones.
The median volume utilization (ratioV, as built today) is 79%, the average 137%. For comparison: canton of Geneva, median 49%.
15% of the parcels have a newest building from 2006 or later. Their average utilization is 125%, against 143% for all parcels.
The median building height is 8.7 m and the median number of floors is 2.2.
Building age
Each parcel is counted by the construction year of its newest building. The oldest band also holds parcels without a building year, such as unbuilt land.
| Newest building | Parcels | Share |
|---|---|---|
| 2021 or later | 54 | 3% |
| 2016-2020 | 65 | 4% |
| 2011-2015 | 61 | 4% |
| 2006-2010 | 54 | 3% |
| 1986-2005 | 308 | 19% |
| 1966-1985 | 280 | 18% |
| 1965 or earlier, or no year | 774 | 48% |
Utilization by construction window
| Newest building | Parcels | Average utilization |
|---|---|---|
| Built 2021 or later | 54 | 142% |
| Built 2016 or later | 119 | 131% |
| Built 2011 or later | 180 | 134% |
| Built 2006 or later | 234 | 125% |
| Built 1986 or later | 542 | 116% |
| Built 1966 or later | 822 | 133% |
| All parcels | 1'596 | 143% |
Utilization (ratioV)
ratioV is the volume utilization of a parcel in percent, as built today; values above 100% occur on densely built parcels. The lowest bucket is mostly land with little or no building volume.
| Utilization (ratioV) | Parcels | Share |
|---|---|---|
| Under 10% | 369 | 23% |
| 10-50% | 159 | 10% |
| 50-100% | 462 | 29% |
| 100-150% | 210 | 13% |
| 150-200% | 95 | 6% |
| 200% or more | 287 | 18% |
Median: 79% · Average: 137% · Based on 1'582 parcels with a value.
Building height
Building height in meters, for parcels with a height value.
| Building height | Parcels | Share |
|---|---|---|
| Under 6 m | 84 | 7% |
| 6-10 m | 739 | 61% |
| 10-16 m | 223 | 19% |
| 16-30 m | 85 | 7% |
| 30 m or more | 71 | 6% |
Median: 8.7 m · Average: 11.3 m · Based on 1'202 parcels with a value.
Floors
Number of floors, for parcels with a floor count.
| Floors | Parcels | Share |
|---|---|---|
| 1 | 614 | 43% |
| 2 | 389 | 28% |
| 3 | 230 | 16% |
| 4 | 61 | 4% |
| 5-6 | 30 | 2% |
| 7 or more | 88 | 6% |
Median: 2.2 · Average: 2.1 · Based on 1'412 parcels with a value.
Other municipalities in the canton
| Place | Parcels | Median utilization | Median floors |
|---|---|---|---|
| Plan-les-Ouates | 2'585 | 65% | 2.1 |
| Thônex | 2'512 | 61% | 2.1 |
| Meyrin | 2'339 | 44% | 1.5 |
| Satigny | 2'280 | 7% | 0.7 |
| Chêne-Bougeries | 2'267 | 69% | 2.2 |
| Versoix | 2'062 | 62% | 1.7 |
| Carouge (GE) | 1'564 | 73% | 1.9 |
| Anières | 1'462 | 9% | 0.8 |
| Le Grand-Saconnex | 1'449 | 72% | 2.1 |
| Avusy | 1'350 | 8% | 0.7 |
| Cologny | 1'329 | 70% | 2.1 |
| Pregny-Chambésy | 1'327 | 61% | 2.2 |
Explore
Method and data
The figures come from the Swiss parcel data (zone statistics of the RES service, pulled in September 2026). Each municipal zone is summarized on its own; a municipality is the sum of its zones, a canton the sum of its municipalities and Switzerland the sum of the cantons. Parcels outside a municipal zone are not counted.
Age uses the construction year of the newest building on a parcel. The distributions leave out the most extreme values, so the parcels with a value can be fewer than all parcels. Percentages are shares of the counts shown; medians are read from the buckets and are exact to within one bucket.
The pages describe what has been built and measured. They are not a forecast, a valuation or a statement of what may be built.