Rents may rise again, says the bank Raiffeisen.
The bank says the war in the Middle East is pushing up energy prices, which risks driving up construction costs and ultimately rents.
A 10% rise in oil prices translates into a 1% increase in construction tariffs.
The Lake Geneva region is particularly exposed, with vacancy rates at just 0.6%, against a national average of 1% - while building work is historically low.
Swiss sea link cut-off
Switzerland's main waterway link to the sea is barely navigable, with the Rhine so low near the German town of Kaub that the river is almost splitting in two.
Water tensions rise with Italy
Tensions are rising between Switzerland and Italy over water, as Lake Maggiore in Ticino approaches a historic low.
Russia spreads lies hoping to sway vote
Swiss intelligence is warning of a targeted Russian campaign to influence the 27 September neutrality vote.
Migros recalls chicken cutlets
Migros is recalling breaded chicken cutlets sold nationwide after a labelling error left them with the wrong use-by date. The packets show 2 October, but the correct date is 28 August.
Geneva aims to attract more film and TV production
Geneva is launching a new incentive programme to attract more film and television productions to the canton.
More jihadist cases reach court
Switzerland's federal prosecutor is running 140 investigations into suspected jihadist terrorism — the highest figure ever recorded.
