Rorschach: building age and utilization
Canton of St. Gallen · 1'512 parcels in municipal zones · Parcel data of September 2026
- Parcels in zones
- 1'512
- Municipal zones
- 21
- Median utilization (ratioV)
- 86%
- Newest building from 2006 or later
- 7%
- Median building height
- 13.5 m
- Median floors
- 3.5
Overview
Rorschach: the parcel data lists 1'512 parcels in 21 municipal zones.
The median volume utilization (ratioV, as built today) is 86%, the average 91%. For comparison: canton of St. Gallen, median 58%.
7% of the parcels have a newest building from 2006 or later. Their average utilization is 103%, against 99% for all parcels.
The median building height is 13.5 m and the median number of floors is 3.5.
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 | 21 | 1% |
| 2016-2020 | 19 | 1% |
| 2011-2015 | 37 | 2% |
| 2006-2010 | 35 | 2% |
| 1986-2005 | 136 | 9% |
| 1966-1985 | 142 | 9% |
| 1965 or earlier, or no year | 1'122 | 74% |
Utilization by construction window
| Newest building | Parcels | Average utilization |
|---|---|---|
| Built 2021 or later | 21 | 89% |
| Built 2016 or later | 40 | 105% |
| Built 2011 or later | 77 | 104% |
| Built 2006 or later | 112 | 103% |
| Built 1986 or later | 248 | 144% |
| Built 1966 or later | 390 | 146% |
| All parcels | 1'512 | 99% |
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% | 334 | 22% |
| 10-50% | 119 | 8% |
| 50-100% | 421 | 28% |
| 100-150% | 362 | 24% |
| 150-200% | 172 | 12% |
| 200% or more | 84 | 6% |
Median: 86% · Average: 91% · Based on 1'492 parcels with a value.
Building height
Building height in meters, for parcels with a height value.
| Building height | Parcels | Share |
|---|---|---|
| Under 6 m | 24 | 2% |
| 6-10 m | 152 | 13% |
| 10-16 m | 658 | 58% |
| 16-30 m | 305 | 27% |
| 30 m or more | 5 | 0.4% |
Median: 13.5 m · Average: 13.9 m · Based on 1'144 parcels with a value.
Floors
Number of floors, for parcels with a floor count.
| Floors | Parcels | Share |
|---|---|---|
| 1 | 335 | 27% |
| 2 | 144 | 12% |
| 3 | 280 | 23% |
| 4 | 287 | 23% |
| 5-6 | 164 | 13% |
| 7 or more | 16 | 1% |
Median: 3.5 · Average: 2.7 · Based on 1'226 parcels with a value.
Other municipalities in the canton
| Place | Parcels | Median utilization | Median floors |
|---|---|---|---|
| Rorschacherberg | 1'753 | 64% | 2.5 |
| Jonschwil | 1'725 | 67% | 2.1 |
| Rüthi (SG) | 1'715 | 10% | 0.8 |
| Degersheim | 1'649 | 74% | 2.4 |
| Uznach | 1'625 | 72% | 2.7 |
| Kaltbrunn | 1'615 | 69% | 2.4 |
| Mörschwil | 1'404 | 62% | 2.3 |
| Eggersriet | 1'339 | 49% | 1.9 |
| Benken (SG) | 1'313 | 55% | 2.2 |
| Marbach (SG) | 1'290 | 47% | 1.5 |
| Schmerikon | 1'104 | 66% | 2.6 |
| Niederbüren | 1'094 | 9% | 0.8 |
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.