Valais has no customary termination dates. Without dates in the lease, notice can be given for the end of any three-month rental period counted from the start of the lease, so the dates in your lease usually decide. The notice dates in your lease take precedence over customary dates; the notice period for flats is at least three months (Art. 266c CO).
| Area | Dates | Note |
|---|---|---|
| Entire canton | no customary dates | No customary dates – the dates in your lease apply, otherwise the end of a three-month rental period from the start of the lease. |
The termination dates in your lease always take precedence. For flats the notice period is at least three months (Art. 266c OR).
For a lease in Sion without its own termination dates, our calculator currently works with 31.03. · 30.06. · 30.09. The next reachable date: send the request by 26.12.2026, and the lower rent applies from 01.04.2027.
Where termination is possible at more dates, we deliberately use a conservative subset so that no request is sent too late.
Cantonal conciliation commission for tenancy
One commission for the whole canton, based in Sion (Avenue du Midi 7), with contacts for Lower, Central and Upper Valais (ccc-ksb@admin.vs.ch). The request is filed in writing; the commission advises the parties and provides the official forms. Conciliation in tenancy matters is free of charge (Art. 113(2)(c) Swiss Civil Procedure Code).
Official information and addresses
Tenants have 30 days to file after a refusal or after the landlord's 30-day answer window has passed (Art. 270a para. 2 OR). See what to do if the landlord refuses.
For individual advice: ASLOCA Valais
In Lower and Central Valais landlords, property managers and the commission communicate in French, in Upper Valais in German. The reduction request should be written in the language of the region.
Applies to e.g. Sion, Martigny, Monthey, Sierre, Brig-Glis, Visp.
Compiled with care from the sources listed; customary dates can vary locally. No legal advice.