Tenants’ associations in French speaking areas say renters can demand rent reductions when their flats become unliveable in the heat.
Asloca is responding to reports of overnight temperatures of up to 38°C in top-floor flats built between the 1950s and 1980s.
The group argues landlords must either lower the rent during heatwaves or fit cooling measures, treating extreme heat as a defect in the property.
With MeteoSwiss forecasting peaks near 37°C all week, who pays to cool a flat is heading for the tenancy tribunals.
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