Filing with the conciliation board
In Switzerland, most tenancy disputes — including rent challenges — must first go to a cantonal conciliation board (or equivalent) before court. This is the usual step when the landlord refuses a reduction or stays silent after your letter.
Why this step is required
Conciliation aims to resolve disputes amicably, quickly and at lower cost. For residential leases, prior referral to the board is generally a condition for a civil court action on the merits — except for rare legal exceptions.
Skipping this step may lead to dismissal or inadmissibility.
When to refer to the board (~30 days)
After your letter to the landlord (reduction under Art. 270a CO or initial challenge under Art. 270 CO), a written refusal or roughly 30 days of silence in practice allows a conciliation request.
Each canton sets its form, any fees and territorial jurisdiction. Check your canton’s website for the authority competent for the rental address.
How the procedure works
You file a written request with documents (lease, correspondence, rent calculation). The board summons parties to a hearing. The aim is agreement; failing that, it may issue a decision or recommendation depending on the canton, and a certificate for possible court proceedings.
Swirent can generate draft petition and detailed report templates; you remain a party and must appear or be represented under cantonal rules.
Limits and realistic expectations
Conciliation guarantees neither automatic reduction nor later court success. The landlord may hold firm; the court decides on the merits.
Swirent documents help present your calculation and arguments but do not replace a lawyer or promise a favourable outcome. Timelines and costs vary by canton.