Rents in Switzerland

Rents in Switzerland: Setting, Increase, Contestation

The Swiss rental market has characteristics that require a thorough understanding of the applicable legal framework. The relationship between landlords and tenants is governed by precise provisions of the Code of Obligations and various federal ordinances that strictly govern the initial setting of rents, the possibilities for increase and the avenues for contestation. In a country where nearly 60% of the population are tenants, mastering these legal aspects becomes fundamental to defending one's rights. The mechanisms for protection against excessive rents, the contestation procedures and the subtleties related to the calculation of the admissible yield constitute a complex whole that our law firm deciphers daily to assist landlords and tenants in their proceedings.

Legal Framework and Fundamental Principles of Tenancy Law in Switzerland

Tenancy law in Switzerland is primarily governed by the Code of Obligations (CO), more precisely by articles 253 to 274g. These provisions are supplemented by the Ordinance on the Lease of Residential and Commercial Premises (OLRA). This strict legal framework aims to establish a balance between the interests of landlords and the protection of tenants.

Swiss legislation is structured around several guiding principles that shape all the rules applicable to tenancy relationships:

• The principle of freedom of contract, which allows the parties to freely negotiate certain aspects of the contract
• Protection against excessive rents, which limits this freedom to prevent excessive returns
• Protection against wrongful terminations, which secures the tenant in their home
• Transparency of tenancy conditions, which requires the landlord to inform the tenant

In residential tenancy matters, the Swiss legislature has established a system of enhanced protection, considering housing as an essential commodity. This protection manifests itself notably through the possibility of contesting the initial rent or its increase when it procures an excessive return or when it results from a manifestly excessive purchase price.

The Competent Authorities in Tenancy Matters

Each canton has a conciliation authority for tenancy matters, which constitutes the mandatory first step before any judicial procedure. This joint authority is composed of representatives of landlords and tenants, chaired by a neutral person, generally a legal professional. Its role is to attempt to resolve disputes amicably before they are brought before the courts.

In the event of failed conciliation, the dispute may be brought before the ordinary courts or, in certain cantons, before specialised tenancy courts. The procedure is generally simple and fast, with limited court fees to guarantee access to justice for all.

The Federal Supreme Court, as the supreme authority, plays a determining role in the interpretation of statutory provisions relating to tenancy law. Its extensive case law clarifies and supplements the legislative framework, constituting an indispensable legal source for practitioners.

Evolution of the Reference Mortgage Rate

The reference mortgage rate is published quarterly by the Federal Housing Office. It constitutes the main statutory criterion for rent increases and decreases in Switzerland. Here is its recent evolution:

Practical rule: a variation of 0.25% in the mortgage rate opens the right to a rent adaptation of approximately 2 to 3%. A decrease in the rate should benefit the tenant, who may request it in writing from the landlord.

The Setting of the Initial Rent and Its Validity Conditions

The setting of the initial rent represents a fundamental step in the tenancy relationship. In Switzerland, the principle of freedom of contract allows the parties to freely determine the rent amount upon conclusion of the contract. However, this freedom is tempered by statutory provisions aimed at preventing abuses.

For an initial rent to be validly set, the landlord must comply with several formal requirements. In cantons experiencing a housing shortage (such as Geneva, Vaud, Zurich or Zug), the landlord is required to use an official form to communicate the initial rent to the tenant. This form must mention:

• The amount of the previous rent
• The grounds for any increase compared to the previous rent
• The tenant's possibility of contesting the rent within a period of 30 days

Failure to use this official form in cantons where it is mandatory results in the agreed rent being void. In this case, the judicial authority will set the rent based on various statutory criteria.

The Criteria for Setting the Initial Rent

The rent is considered excessive when it allows the landlord to obtain an excessive return or when it results from a manifestly excessive purchase price. To determine whether a rent is excessive, the authorities rely on several methods:

The absolute net yield method examines whether the rent procures for the landlord a net return on equity invested that does not exceed the reference mortgage rate by more than 0.5%. The calculation takes into account property charges (maintenance costs, operating charges, depreciation) and equity invested.

The relative method of usual rents in the area compares the contested rent with those charged for comparable dwellings in the same geographical area. This method is subsidiary and only applies when the net yield method cannot be used.

These criteria apply both to the setting of the initial rent and to subsequent increases, thereby guaranteeing consistency in the legal approach to rent control in Switzerland.

Rent Increase Mechanisms and Their Statutory Justifications

In Switzerland, increasing a rent during a lease cannot be done arbitrarily. The landlord must comply with strict formal conditions and justify their decision with legally recognised grounds. This procedural rigour constitutes significant protection for tenants.

To be valid, any rent increase must be notified by means of the official form approved by the canton. This notification must reach the tenant at least ten days before the start of the termination period and take effect at the expiry of that period. An increase that does not comply with these formal requirements is considered void.

The increase form must mandatorily contain:

• The amount of the increase
• The effective date
• The precise grounds justifying this increase
• Information on the possibilities for contestation

Legitimate Grounds for Increase

Swiss legislation recognises several grounds allowing the landlord to increase the rent:

The variation in the reference mortgage rate is the most frequent ground. A rule of thumb is that an increase of 0.25% in the mortgage rate justifies a rent increase of approximately 2-3%. Conversely, a decrease in the rate should lead to a reduction in the rent, which the tenant may request.

An increase in operating and maintenance charges may justify a rent increase. This concerns in particular insurance premiums, public charges or maintenance costs that have increased since the last setting of the rent.

Additional services by the landlord, such as renovations or improvements that increase the value of the rented property, may legitimise an increase. Only value-adding investments (and not simple maintenance works) may be passed on to the rent, generally to the extent of 50-70% of their cost.

Adaptation to the Swiss Consumer Price Index (CPI) is possible if the lease agreement expressly provides for it. This adaptation may not exceed 40% of the increase in the index since the last setting of the rent.

Case law has developed precise rules to govern these increases. For example, the landlord cannot cumulatively invoke all these grounds for increase in full, as this could lead to an excessive return. Our law firm regularly assists landlords in the preparation and justification of these increases, to avoid subsequent contestations.

Rent Contestation Procedures and Their Deadlines

Swiss law offers tenants several possibilities for contesting the amount of their rent, whether upon conclusion of the lease or during the contract. These procedures are governed by strict deadlines that must be scrupulously observed.

Contestation of the initial rent must be made within 30 days of receipt of the keys. This step is particularly relevant when the tenant felt compelled to accept a high rent due to the housing shortage, or when they notice a significant increase compared to the previous tenant's rent without apparent justification.

To contest a rent increase, the deadline is also 30 days from receipt of the notice of increase. During this period, the tenant may refer the matter to the conciliation authority without having to terminate their lease.

The Procedure Before the Conciliation Authority

Any rent contestation must mandatorily go through a conciliation attempt before it can be brought before a court. This preliminary phase proceeds as follows:

• The tenant files a written application with the conciliation authority of their canton
• The authority summons the parties to a hearing
• A mediation attempt is made to find an amicable agreement
• In the event of failure, the authority may render a judgment proposal or issue an authorisation to proceed

The procedure before the conciliation authority is free in most cantons and is characterised by its simplicity and speed. It often makes it possible to resolve disputes without resorting to the courts.

If conciliation fails, the tenant generally has a period of 30 days to bring the matter before the competent court. The burden of proof varies according to the type of contestation: for an initial rent, it is for the tenant to demonstrate that they were in a situation of constraint or that the rent was significantly increased compared to the previous tenant; for an increase during the lease, it is for the landlord to justify the grounds invoked.

Our law firm regularly intervenes in these procedures, both to advise tenants on the prospects of success of a contestation and to assist landlords in defending their interests. Legal expertise is particularly valuable in this area where economic calculations (net yield, passing on of value-adding works) are intermingled with legal considerations.

Current Challenges and Practical Solutions in Tenancy Law

The Swiss real estate market is going through a period of tension characterised by a housing shortage in urban centres and a complex evolution of the economic parameters influencing rents. This situation generates specific issues that landlords and tenants must deal with.

The divergence between the evolution of the reference mortgage rate and the rents actually charged constitutes one of the main friction points. Despite several decreases in the mortgage rate in recent years, many tenants have not benefited from the corresponding rent reductions. This situation creates considerable potential for rent reduction requests that tenants may activate at any time.

Managing Energy Renovation Works

The energy transition and Switzerland's climate objectives are leading to an increase in energy renovations in the housing stock. These works raise delicate legal questions concerning:

• The distinction between maintenance works and value-adding works
• The admissible passable rate on rents
• The coordination with public subsidies for energy efficiency
• The rights of tenants during the works period

Our law firm develops particular expertise in accompanying renovation projects, advising landlords on the optimal strategy for enhancing the value of their investments while respecting the legal framework.

The Impact of Digitalisation on Tenancy Relationships

The growing digitalisation of contractual relationships raises new legal questions in the area of tenancy. The validity of electronic communications, the digital signing of contracts or rent increase notices, the protection of tenants' personal data are all subjects that require an updated legal approach.

Recent case law has begun to clarify certain aspects, such as the conditions for the validity of a termination or rent increase communicated electronically. Our team closely monitors these developments to guarantee the legal certainty of the steps taken by our clients.

In the face of the growing complexity of tenancy law, the preventive intervention of a specialist lawyer becomes a major asset. Whether it involves drafting a contract adapted to the specificities of a situation, preparing a justified rent increase that complies with legal requirements, or assessing the chances of success of a contestation, our law firm offers personalised assistance that secures proceedings and prevents costly disputes.

Frequently Asked Questions on Rents in Switzerland