Subletting in Switzerland: consent, rent, and notice
Published 2026-10-19 · Updated 2026-10-19 · 2 min read · 2 sources · Verified Swiss federal benchmarks
Direct answer
You generally need the landlord’s consent to sublet; refusal must be justified. Sub-rent cannot be abusive relative to your main rent, and you remain liable to the landlord for the full lease.
Key facts
- Landlord consent is required for subletting; unjustified refusal can be challenged.
- Sub-rent must not be abusive compared with your rent and costs.
- You stay fully liable for rent and damage to the landlord.
- Notify the landlord of who sublets and on what terms.
- Short tourist-style sublets often breach lease and house rules even with consent.
Getting consent
Request consent in writing before advertising a room or the whole flat. Provide subtenant identity, duration, number of occupants, and proposed rent.
The landlord may refuse for important reasons such as overcrowding relative to floor plan, violation of house rules, or misuse of the property. Arbitrary refusal without grounds can be challenged.
Consent for one subtenant does not automatically extend to the next. Renew approval when the person changes.
Fair sub-rent
You may not charge an abusive sub-rent that exploits the subtenant compared with what you pay the landlord. Align sub-rent with your net rent plus a fair share of Nebenkosten for the space offered.
Furnished rooms can include a modest premium for beds, desks, and kitchenware, but the markup should reflect real costs, not hotel pricing.
Document how you split square metres or rooms so a dispute at the Schlichtungsbehörde can be traced.
| Factor | Allowed | Risky |
|---|---|---|
| Share of total rent | By m² or rooms | Large markup without reason |
| Nebenkosten | Pass-through share | Hidden profit on Akonto |
| Furniture | Modest premium | Commercial hotel pricing |
Worked example: room in a CHF 2,400 flat
You rent a four-room flat for net rent CHF 2,400 plus CHF 280 Nebenkosten Akonto. You sublet one bedroom comprising roughly one quarter of private floor area.
A proportional share of net rent is about CHF 600 plus CHF 70 Nebenkosten, total near CHF 670. Adding CHF 80 for furnished use might yield CHF 750. Charging CHF 1,200 without extra services looks abusive in a challenge.
If you sublet the entire flat while abroad, pass through full rent and documented Nebenkosten only; profit margins above your cost base remain scrutinised.
Your duties as main tenant
Sign a written sublease with notice periods, deposit handling, and house rules. The subtenant has no direct contract with the landlord.
You remain liable for full rent if the subtenant stops paying. Choose deposits or guarantees accordingly.
Inform the landlord when the subtenant leaves or if household composition changes materially for registration purposes.
Common mistakes
Listing on short-stay platforms without checking lease bans on tourist use.
Subletting to more people than the lease allows per square metre.
Keeping sub-rent cash without reporting fair shares when the landlord audits utilities or asks for transparency.
FAQ
- Can the landlord demand the subtenant’s salary slips?
- They may ask for reasonable proof the arrangement is serious, within data-protection limits.
- Is Airbnb-style subletting allowed?
- Short tourist sublets often breach lease and building rules. Consent is unlikely without explicit permission.
- What notice applies to the subtenant?
- Follow your sublease contract; it cannot exceed the main lease end date. Cantonal notice rules for furnished rooms may differ.
- Who keeps the subtenant’s deposit?
- You as main tenant may hold it, but separate blocked accounts are best practice for clarity.
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