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Building age in Seon

Municipality in the canton of Aargau · FSO no. 4209

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

Key figures

Parcels with a building
1’527
1’510 of them with a known construction year
Median construction year
1985Canton: 1986Switzerland: 1976
Median building age
41 yearsCanton: 40 yearsSwitzerland: 50 years
Built 1960 or earlier
22.6%Canton: 22.1%Switzerland: 32.5%
Built after 2000
27.9%Canton: 27.7%Switzerland: 23.3%

About the building stock in Seon

The parcel data lists 1’527 parcels with a building in Seon. For 1’510 of them (98.9%) the federal building register (GWR) gives a construction year, taken from the newest building on the parcel. The median construction year is 1985, so the median parcel with a building is 41 years old. 22.6% of the parcels with a known year were built in 1960 or earlier and 27.9% after 2000. The largest period is 1981-2000 with 29.5%. For comparison, the median construction year is 1986 in the canton of Aargau and 1976 in Switzerland. 17 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 1’510 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. 7.0%before 1920: 7.0%, 105 parcels
  2. 7.9%1920-1945: 7.9%, 119 parcels
  3. 7.7%1946-1960: 7.7%, 117 parcels
  4. 20.0%1961-1980: 20.0%, 302 parcels
  5. 29.5%1981-2000: 29.5%, 445 parcels
  6. 10.9%2001-2010: 10.9%, 164 parcels
  7. 9.5%2011-2020: 9.5%, 144 parcels
  8. 7.5%2021 and later: 7.5%, 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)22.6%341 parcels
  • 46 to 65 years (built 1961-1980)20.0%302 parcels
  • 26 to 45 years (built 1981-2000)29.5%445 parcels
  • Up to 25 years (built 2001 or later)27.9%422 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 Seon

Other large municipalities in the canton of Aargau