
City · 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 %) — a comparatively relaxed market. 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).
11 apartments & houses are currently listed to rent in Au SG on Homematch. The selection updates throughout the day as agencies publish new listings.
The median asking rent in Au SG is around CHF 18 per m² per month. For an 80 m² property that works out to roughly CHF 1'458 per month — actual prices vary by neighbourhood, condition and amenities.
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.
1.8 kmCHF 1'220 /month
3.5 rooms · 68 m²
Rosenstrasse 2, 9430 St. Margrethen SG
CHF 1'490 /month
3.5 rooms · 70 m²
Im Hinterguet 2, 9430 St. Margrethen SG
2.5 rooms · 100 m²
Rosenstrasse 10, 9430 St. Margrethen
CHF 1'100 /month
2 rooms
Wiesenstrasse 8A, 9430 St. Margrethen
CHF 1'170 /month
3 rooms · 59 m²
Karl Völker-Strasse 26, 9435 Heerbrugg