
Municipality · St. Gallen
Au is a municipality in the Wahlkreis (constituency) of Rheintal in the canton of St. Gallen in Switzerland.
Fibre
The rental vacancy rate is 2.98%, 117% above the cantonal average (1.37 %). The municipal tax multiplier (Steuerfuss) is 99%, 12% below the cantonal average (113 %) — tax-favourable. Median taxable income is CHF 57'000, 8% below the Swiss median (CHF 61'929). Au (SG) has 8'771 residents (2025).
Source: Swiss Federal Statistical Office (BFS).
7 houses are currently listed to buy in Au (SG) on Homematch. The selection updates throughout the day as agencies publish new listings.
The median asking price in Au (SG) is around CHF 7'830 per m². For an 80 m² property that's roughly CHF 626'415 — actual prices vary widely by neighbourhood, age and condition.
Au (SG) is located in the canton of St. Gallen.
Au (SG) has approximately 8'771 residents.
The municipal tax multiplier (Steuerfuss) in Au (SG) is 99% of the cantonal base rate. Note: this is a multiplier of the cantonal income tax, not an effective tax rate.
CHF 948'000
6.5 rooms · 145 m²
Toniwisweg 5, 9443 Widnau
CHF 290'000
8.5 rooms · 191 m²
Leuchen 446, 9428 Walzenhausen
5 rooms · 109 m²
Schachenstrasse 10, 9430 St. Margrethen
CHF 1'190'000
7.5 rooms · 183 m²
Dietrichshaldenstrasse 7, 9430 St. Margrethen
CHF 1'390'000
8.5 rooms · 206 m²
Botenaustrasse 22a, 9443 Widnau
2.4 kmCHF 998'000
4.5 rooms · 107 m²
Wuhrstrasse 14, 9443 Widnau

CHF 924'000
5.5 rooms · 172 m²
9430 Sankt Margrethen