Birr: building age and utilization
Canton of Aargau · 1'146 parcels in municipal zones · Parcel data of September 2026
- Parcels in zones
- 1'146
- Municipal zones
- 21
- Median utilization (ratioV)
- 78%
- Newest building from 2006 or later
- 18%
- Median building height
- 9.1 m
- Median floors
- 2.2
Overview
Birr: the parcel data lists 1'146 parcels in 21 municipal zones.
The median volume utilization (ratioV, as built today) is 78%, the average 74%. For comparison: canton of Aargau, median 35%.
18% of the parcels have a newest building from 2006 or later. Their average utilization is 111%, against 79% for all parcels.
The median building height is 9.1 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 | 40 | 3% |
| 2016-2020 | 44 | 4% |
| 2011-2015 | 49 | 4% |
| 2006-2010 | 75 | 7% |
| 1986-2005 | 271 | 24% |
| 1966-1985 | 172 | 15% |
| 1965 or earlier, or no year | 495 | 43% |
Utilization by construction window
| Newest building | Parcels | Average utilization |
|---|---|---|
| Built 2021 or later | 40 | 96% |
| Built 2016 or later | 84 | 120% |
| Built 2011 or later | 133 | 114% |
| Built 2006 or later | 208 | 111% |
| Built 1986 or later | 479 | 115% |
| Built 1966 or later | 651 | 116% |
| All parcels | 1'146 | 79% |
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% | 379 | 34% |
| 10-50% | 49 | 4% |
| 50-100% | 337 | 30% |
| 100-150% | 243 | 22% |
| 150-200% | 81 | 7% |
| 200% or more | 36 | 3% |
Median: 78% · Average: 74% · Based on 1'125 parcels with a value.
Building height
Building height in meters, for parcels with a height value.
| Building height | Parcels | Share |
|---|---|---|
| Under 6 m | 105 | 15% |
| 6-10 m | 348 | 49% |
| 10-16 m | 252 | 35% |
| 16-30 m | 9 | 1% |
| 30 m or more | 1 | 0.1% |
Median: 9.1 m · Average: 8.9 m · Based on 715 parcels with a value.
Floors
Number of floors, for parcels with a floor count.
| Floors | Parcels | Share |
|---|---|---|
| 1 | 434 | 45% |
| 2 | 298 | 31% |
| 3 | 197 | 21% |
| 4 | 22 | 2% |
| 5-6 | 7 | 0.7% |
| 7 or more | 1 | 0.1% |
Median: 2.2 · Average: 1.5 · Based on 959 parcels with a value.
Other municipalities in the canton
| Place | Parcels | Median utilization | Median floors |
|---|---|---|---|
| Staufen | 1'203 | 72% | 2.2 |
| Niederrohrdorf | 1'202 | 64% | 2.1 |
| Wallbach | 1'202 | 63% | 1.9 |
| Oberwil-Lieli | 1'194 | 45% | 1.4 |
| Hunzenschwil | 1'163 | 77% | 2.2 |
| Densbüren | 1'149 | 7% | 0.7 |
| Schupfart | 1'113 | 7% | 0.6 |
| Boniswil | 1'109 | 9% | 0.9 |
| Dürrenäsch | 1'093 | 9% | 0.8 |
| Egliswil | 1'084 | 9% | 0.8 |
| Vordemwald | 1'082 | 54% | 1.1 |
| Tegerfelden | 1'079 | 8% | 0.7 |
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.