
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).
9 apartments & 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 7'937 per m². For an 80 m² property that's roughly CHF 634'946 — 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 1'090'000
4.5 rooms · 132 m²
Nöllenstrasse 2, 9443 Widnau
2.0 kmCHF 850'000
6 rooms · 160 m²
Untere Haldenstrasse 12A, 9430 St. Margrethen SG
1.8 kmCHF 795'000
3.5 rooms · 102 m²
Brändlihangstrasse 10, 9442 Berneck
1.8 kmCHF 1'550'000
4.5 rooms · 202 m²
Brändlihangstrasse 10, 9442 Berneck
CHF 985'000
3.5 rooms · 132 m²
Brändlihangstrasse 10, 9442 Berneck
CHF 535'000
3.5 rooms · 70 m²
Im Hinterguet 2, 9430 St. Margrethen SG