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Building age in Altstätten

Municipality in the canton of St. Gallen · FSO no. 3251

Building register (GWR) export of September 2026, parcel data of July 2025.

Key figures

Parcels with a building
3’918
3’801 of them with a known construction year
Median construction year
1975Canton: 1977Switzerland: 1976
Median building age
51 yearsCanton: 49 yearsSwitzerland: 50 years
Built 1960 or earlier
35.6%Canton: 30.4%Switzerland: 32.5%
Built after 2000
21.5%Canton: 22.0%Switzerland: 23.3%

About the building stock in Altstätten

The parcel data lists 3’918 parcels with a building in Altstätten. For 3’801 of them (97.0%) the federal building register (GWR) gives a construction year, taken from the newest building on the parcel. The median construction year is 1975, so the median parcel with a building is 51 years old. 35.6% of the parcels with a known year were built in 1960 or earlier and 21.5% after 2000. The largest period is before 1920 with 23.8%. For comparison, the median construction year is 1977 in the canton of St. Gallen and 1976 in Switzerland. 117 parcels with a building have no usable construction year and are left out of the shares.

Construction-year histogram

Parcels with a building by construction period, as a share of the 3’801 parcels with a known year. The periods are not equally long, so read the bars as shares of the stock, not as building activity per year.

  1. 23.8%before 1920: 23.8%, 906 parcels
  2. 4.0%1920-1945: 4.0%, 152 parcels
  3. 7.8%1946-1960: 7.8%, 296 parcels
  4. 19.7%1961-1980: 19.7%, 749 parcels
  5. 23.1%1981-2000: 23.1%, 879 parcels
  6. 11.6%2001-2010: 11.6%, 440 parcels
  7. 7.0%2011-2020: 7.0%, 265 parcels
  8. 3.0%2021 and later: 3.0%, 114 parcels

Building age distribution

The same parcels grouped by the age of their newest building in 2026.

  • 66 years or older (built 1960 or earlier)35.6%1’354 parcels
  • 46 to 65 years (built 1961-1980)19.7%749 parcels
  • 26 to 45 years (built 1981-2000)23.1%879 parcels
  • Up to 25 years (built 2001 or later)21.5%819 parcels

How to read these figures

The parcel data links every parcel to the federal building register (GWR). A parcel counts once, with the construction year of its newest building. Where the register gives only a construction period, the middle of the period is used.

The figures count parcels with a building, not individual buildings. A parcel with several buildings counts once, and a parcel without a building is not counted.

Building age is 2026 minus the construction year. Every share divides by the parcels with a known construction year.

See it on the map

roots colors every parcel by construction year, from deep red for the oldest buildings to pale cream for the newest.

Open the roots map in Altstätten

Other large municipalities in the canton of St. Gallen