Defects in rented property are a frequent source of disputes between tenants and landlords in Switzerland. Swiss law provides tenants with a graduated set of remedies, ranging from a simple repair request to extraordinary termination of the lease, including rent reduction and deposit of future rents. PBM Avocats assists you in qualifying the defect and exercising your rights in Geneva and Lausanne.
The Concept of Defect under Swiss Rental Law
A defect within the meaning of rental law exists when the rented property does not have the qualities promised or the qualities the tenant was entitled to expect given the contractually agreed use (art. 258 CO). A defect may be physical (water infiltration, mould, equipment failure) or legal (an undisclosed easement limiting use).
Swiss law distinguishes three categories of defects according to their severity:
| Category | Description | Examples | Available Remedies |
|---|---|---|---|
| Serious defect | Makes use impossible or very difficult | Prolonged heating failure in winter, flooding | Repair, rent reduction, extraordinary termination |
| Medium defect | Significantly impairs use | Major mould, broken lift, noise nuisance | Repair, rent reduction, rent deposit |
| Minor defect | Slightly impairs use | Dripping tap, slightly stiff lock | Repair request only |
Tenant Remedies for Defects (arts. 259a–259i CO)
1. The Repair Request
The tenant must first notify the defect in writing to the landlord (preferably by registered letter) and set a reasonable deadline for remediation. This deadline must be proportional to the urgency and complexity of the necessary repairs. Written formal demand is a prerequisite for exercising the other remedies provided for in arts. 259a et seq. CO.
2. Rent Reduction (art. 259d CO)
The tenant is entitled to a rent reduction proportional to the reduction in use caused by the defect, from notification of the defect to the landlord until it is remedied. This reduction does not require a prior judicial decision: the tenant may reduce rent payments, subject to the risk of judicial challenge by the landlord. However, it is recommended to have the right to reduction confirmed by the conciliation authority.
3. Rent Deposit (art. 259g CO)
The deposit allows the tenant to deposit future rents with the conciliation authority rather than paying them directly to the landlord, in order to exert legal pressure on the landlord to proceed with repairs. The conditions are:
- The defect must have been notified in writing to the landlord with formal demand
- The landlord must have refused or delayed remedying the defect
- The tenant must have previously notified the landlord of the intention to deposit
- The deposit is made with the competent conciliation authority
4. Repairs at the Landlord's Expense (art. 259b CO)
If the landlord fails to remedy a serious defect within the set deadline, the tenant may have the repairs carried out themselves and claim reimbursement from the landlord. This measure must be limited to strictly necessary repairs and the tenant must notify the landlord in advance. The costs incurred must be proportionate and documented by quotes and invoices.
5. Extraordinary Termination (art. 259b let. a CO)
For persistent serious defects, the tenant may terminate the lease extraordinarily with notice corresponding to the legal period, without waiting for the contractual term. This extreme measure requires:
- A serious defect making the dwelling difficult to inhabit
- A prior formal demand that remained without effect
- Notice complying with legal periods
- Notification using an official form (for dwellings)
Common Practical Cases in Geneva and Lausanne
| Type of Defect | Indicative Rent Reduction | Severity |
|---|---|---|
| Major mould (bedroom) | 10 to 20% | Medium to serious |
| Heating failure (winter) | 20 to 50% depending on duration | Serious |
| Water infiltration (ceiling/basement) | 15 to 40% | Medium to serious |
| Lift out of service (high-rise) | 5 to 15% | Medium |
| Exceptional noise nuisance | 5 to 25% depending on intensity | Minor to serious |
| Infestation (mice, cockroaches) | 15 to 30% | Serious |
| Dripping tap | 1 to 3% | Minor |
Procedure to Follow
- Step 1: Document the defect (photos, videos, temperature readings, witness accounts)
- Step 2: Notify the defect by registered letter to the landlord with a remediation deadline
- Step 3: In the absence of a response or repair, consider rent reduction or deposit
- Step 4: Refer the matter to the conciliation authority if the landlord refuses
- Step 5: If conciliation fails, refer to the Rental Tribunal
PBM Avocats assists both tenants and landlords at every stage of managing property defects, from drafting formal demand letters to representation before Geneva and Vaud courts.
Frequently Asked Questions about Defects in Rented Property in Switzerland
What are the landlord's obligations when a tenant reports a defect?
Once the tenant reports a defect in writing, the landlord must remedy it within a reasonable period (art. 259a CO). If the defect is serious and the landlord is slow to respond, the tenant may set a deadline by registered letter. If this deadline expires without remedy, the tenant may have the repairs carried out at the landlord's expense (art. 259b CO), request a rent reduction proportional to the defect (art. 259d CO), or even terminate the lease extraordinarily if the defect is serious (art. 259b let. a CO).
How does rent deposit work in case of a defect (art. 259g CO)?
If the landlord fails to remedy the defect despite a formal demand, the tenant may deposit future rents with the competent conciliation authority (art. 259g CO). The tenant must first notify the landlord of this intention. The deposit does not exempt from paying rent: it simply ensures that rent is available to cover repair costs or reductions granted. Once the defect is remedied, the deposit ceases and the deposited rents are released.
Does mould constitute a defect chargeable to the landlord?
Mould may be a landlord's or a tenant's defect depending on its cause. If it results from a construction defect, insufficient insulation or a structural moisture problem, it is chargeable to the landlord (art. 258 CO). If it results from the tenant's behaviour (insufficient ventilation, drying laundry indoors, furniture pushed against walls), liability may be attributed to the tenant in whole or in part. In disputed cases, technical expertise is often necessary to determine the exact cause.
What rent reduction can I obtain for a defect?
The rent reduction proportional to the defect (art. 259d CO) is calculated according to the importance of the defect and its duration. A minor defect (dripping tap) may justify a reduction of 2 to 5%. A medium defect (heating failure for a few days in winter) may justify 10 to 20%. A serious defect rendering the dwelling partially or totally uninhabitable may justify up to 50%, or even 100% for periods of total uninhabitability. The reduction is due from notification of the defect to the landlord until it is remedied.
Can I terminate my lease if the heating breaks down in winter?
A persistent heating breakdown in the depths of winter constitutes a serious defect. If the landlord fails to remedy it within a reasonable period after formal demand, the tenant may terminate the lease extraordinarily with notice corresponding to the legal period (art. 259b let. a CO). This termination must be preceded by a written formal demand setting a specific deadline. PBM Avocats recommends carefully documenting the steps taken (temperature readings, written exchanges) before proceeding with this termination which has significant consequences.