Housing defects in Zurich: damp, heating, repairs
Published on 09.10.2026 · Updated on 09.10.2026
Damp, faulty heating or repairs left undone in your flat in Zurich? Inform your landlord of the defect in writing and set a deadline for the repair. From the moment the landlord knows of the defect, you may claim the repair and a rent reduction proportional to the defect. When Aidloc opens, it will help you draft this defect notice (Mängelrüge) in German, from CHF 19.90.
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Opening soon · Canton of Vaud · From CHF 14.90
The first steps
An unaddressed housing defect can justify several actions: repair request, rent reduction, or referral to the commission. The starting point is always the same: the landlord must know of the defect. A written defect notice (Mängelrüge) with a deadline proves the date and is required before the rent can be paid into a designated account. Without this documented letter, it is difficult to assert your rights afterwards. At its opening, Aidloc will draft this defect notice in German.
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Opening soon · Canton of Vaud · From CHF 14.90
Common mistakes to avoid
- Reporting the defect verbally only.
- Waiting several months before formalising the defect notice.
- Failing to take dated photographs of the defect.
- Requesting a rent reduction without a prior defect notice.
Example
Example: a tenant in Zurich with damp in the bedroom since moving in. For months, the landlord took no concrete action. A formal defect notice describes the problem, attaches dated photographs and sets a deadline for the repair. It gives the landlord a precise request to answer; without an answer, the next step is the conciliation commission.
The competent authority and its contact details are listed in your Aidloc dossier.
Frequently asked questions
How long does it take to receive the letter?
Aidloc is not open yet; the buttons on this page lead to a waitlist. At its opening, the letter will be generated in German and delivered to your email as a PDF, ready to print and send.
Why is the letter generated in German?
In the canton of Zurich, the official language for rental matters is German, so the letter will be drafted in German. When Aidloc opens, you will be able to describe your situation in English.
What if the landlord does not respond to my letter?
If you get no response by the deadline you set, the next step can be a formal notice (from CHF 49.90 when Aidloc opens). If this also remains unanswered, you can turn to the conciliation authority (Schlichtungsbehörde) of the district where the dwelling is located.
Does Aidloc replace a lawyer?
No. Aidloc is a writing aid. It does not provide legal advice and is not a substitute for the advice of a lawyer or a legal adviser. For an in-depth analysis of your situation, it is advisable to consult a lawyer or a tenant association.
Is my data secure?
Your data is hosted in Switzerland and processed in accordance with the Swiss Federal Act on Data Protection (FADP). The privacy policy explains which data is collected, why, and how long it is kept.
How much does the service cost?
When Aidloc opens, the simple letter will be available from CHF 29.90, the formal notice from CHF 49.90, and the conciliation file from CHF 79.90. No subscription, no hidden fees.
Which languages can I use Aidloc in?
The Aidloc site is available in French, German, Italian, English and Portuguese. When Aidloc opens, the letter will always be drafted in the official language of the canton where the dwelling is located.
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Opening soon · Canton of Vaud · From CHF 14.90
Rédigé par Sandro, fondateur d'Aidloc. Lui-même locataire ayant vécu un litige avec sa gérance, il a fondé Aidloc pour permettre à chaque locataire suisse de faire valoir ses droits simplement et avec sérénité. Aidloc est hébergé en Suisse chez Infomaniak.
Aidloc is a writing aid. It does not provide legal advice and is not a substitute for the advice of a lawyer or a legal adviser. Aidloc does not represent you and is not a law firm. Documents are prepared solely on the basis of the information you provide, which Aidloc does not verify; deadlines are calculated from the dates you entered. For any complex or urgent situation, you are advised to contact an authorised legal professional or a tenants' association.