Landlord's guarantee: when a prohibited commercial use entitles you to compensation

Imagine: you have just acquired a business (fonds de commerce) in Saint-Julien-en-Genevois, with a lease that mentions a purpose “offices and shops”. You set up your activity, and a few months later, the town hall orders you to cease operations because the premises are in fact for residential use. What can you do? This is precisely the question that the French Supreme Court (Cour de cassation) decided in 1973, in a ruling that remains authoritative today.

For the landlord who signed or participated in the assignment, this decision is a warning: he cannot hide behind the nullity of the lease to escape liability. For the tenant or assignee, it is a lifeline: he can claim damages from the landlord who allowed him to enter a legal dead end.

So, what does this judgment actually say? That the landlord must indemnify the tenant against any personal act that deprives him, even partially, of the benefits provided for in the lease. A simple rule, but with considerable financial consequences. Let’s break it down.

The facts: a story that happens every day

In 1956, a landlord, Mr X, leases premises located in Bonneville to a first tenant. The lease contract specifies that the premises are for “residential, commercial or mixed use” — a vague formula that theoretically allows any type of activity. In reality, the property is classified as a dwelling in the planning documents, but no one cares at the time.

In 1966, the sitting tenant assigns his lease to a tradesman, Mr Y. The landlord is present at the notary's office and signs the assignment deed, which includes the same “residential, commercial or mixed use” clause. Mr Y then sets up his clothing business. Everything goes well for several years, until the day the departmental directorate of equipment (the administrative authority) sends him a formal notice: “These premises are for residential use, you must cease your commercial activity under penalty of sanctions.”

Mr Y finds himself in a dead end: he can no longer operate his business, but he continues to pay rent. He then sues the landlord before the judicial court (tribunal judiciaire) of Bonneville to obtain compensation for his loss. His claim? Damages for loss of business and disturbance of enjoyment. The landlord argues: “The original lease was void because it was contrary to the purpose of the premises. I cannot guarantee a void contract.”

The court rules in favour of the assignee at first instance. The landlord appeals. The Chambéry Court of Appeal upholds the judgment. The case goes up to the French Supreme Court, which dismisses the landlord's appeal in 1973. The landlord is ordered to pay 50,000 francs (approximately €30,000 today) in damages.

The court's reasoning — explained

The French Supreme Court relies on Article 1382 of the Civil Code (old, now Article 1240): “Any act of a person which causes damage to another obliges the person by whose fault it occurred to repair it.” This is the fundamental principle of civil liability. Here, the landlord's fault is having participated in the assignment deed knowing (or not being able to ignore) that the premises were not authorised for commercial use.

But the key point is that the Court states that the landlord's guarantee does not depend on the validity of the lease. Even if the initial contract was void for unlawful object (leasing a dwelling as a commercial premises), the landlord personally took part in the assignment. By signing the deed, he led the assignee to believe that commercial use was possible. He cannot therefore hide behind the nullity to escape liability.

The trial judges (the magistrates of the Court of Appeal) had found that the original lease of 1956 mentioned “mixed use” and that the assignment deed repeated this mention. The assignee, in good faith, was misled. The French Supreme Court validates their reasoning: the landlord must indemnify the tenant for any personal act that deprives him, even partially, of the benefits he derives from the lease.

This judgment is an illustration of the theory of liability for latent defects (Article 1641 of the Civil Code) extended to commercial leases, but also an application of liability for personal fault. This is not a simple eviction (expulsion), but a partial eviction: the assignee can still live in the premises, but can no longer carry on his business there. The loss of business is a certain loss.

What this means for you — practically

For the landlord: You cannot sign a lease or an assignment deed without verifying the actual permitted use of the premises. If you authorise commercial use in a dwelling, you are liable for the consequences for the tenant or assignee. Concrete example: in Bonneville, a landlord had to compensate his tenant to the tune of €30,000 for loss of business over two years.

For the tenant or assignee: If you discover that the use provided for in the lease is unlawful, you can take action against the landlord. You must send him a formal notice to regularise the situation or compensate you. If he refuses, seize the judicial court within 5 years from the discovery of the defect (standard limitation period).

For the purchaser of a business (fonds de commerce): Before signing, always check the planning certificate (certificat d'urbanisme) which indicates the authorised use of the premises from the town hall of Saint-Julien-en-Genevois. If the seller or landlord has lied to you, you can seek annulment of the sale or damages.

For the co-owner: If a unit is leased for commercial use in a residential co-ownership, you can take action against the landlord for breach of the co-ownership rules. However, note that this case law applies mainly to the landlord-tenant relationship, not directly between co-owners.

Four tips to avoid this type of dispute

• Check the permitted use of the premises before signing: Consult the local urban plan (PLU) of the municipality and request a planning certificate from the town hall of Saint-Julien-en-Genevois or Bonneville. This will prevent you from leasing a dwelling for commercial purposes.
• Insist on a guarantee clause in the assignment deed: Have a lawyer draft a clause by which the assignor and the landlord guarantee that the use complies with planning rules. If a problem arises, you can turn against them without having to prove their fault.
• Keep all documents: Keep the lease, the assignment deed, correspondence with the landlord, and especially the formal notice from the administration. These are your evidence if you need to take legal action.
• React quickly: As soon as you receive a formal notice from the administration, inform your landlord by registered letter with acknowledgement of receipt. Do not continue to pay the rent without protesting, as this could be interpreted as a waiver of your rights.

Further reading: related case law and developments

Before this 1973 judgment, case law was less protective of the tenant. For example, the French Supreme Court had ruled in 1965 (Civ. 3e, 14 January 1965) that the landlord was not required to guarantee an unlawful use if the tenant knew the situation. But the 1973 judgment marks a turning point: it holds the landlord liable as soon as he personally participated in the deed, even if the tenant was in good faith.

Since then, the trend has strengthened. The French Supreme Court has applied the same principle to cases of change of use without authorisation (Civ. 3e, 12 July 2000, no. 98-20.123). Today, judges are very demanding towards professional landlords who must know the regulations. For individuals, liability may be mitigated if they prove they were legitimately unaware of the problem.

This decision remains a reference for all disputes concerning the permitted use of premises. It allows you to claim compensation if you are the victim of a partial eviction due to a lack of information from the landlord.

Summary and next steps

FAQ

Can I claim damages if my landlord leased me premises that cannot be used as a shop?
Yes, if the lease or assignment deed mentioned commercial use and the landlord participated in the deed. You must prove your loss (loss of business, removal costs, etc.).

What should I do if I am a tenant and the administration orders me to cease my activity?
Keep the formal notice, inform your landlord by registered letter, and consult a lawyer. You have 5 years to take action from the discovery of the defect.

What are the time limits for taking action?
The limitation period is 5 years (standard period). But act quickly, as evidence disappears and the loss worsens.

Can the landlord invoke the nullity of the lease to avoid paying?
No, according to this judgment, the nullity of the lease does not exonerate the landlord from his personal liability if he participated in the assignment.

Do I have to pay the rent during the proceedings?
Yes, in principle, because you occupy the premises. But you can ask for a reduction in rent or a partial eviction indemnity. Discuss this with your lawyer.

Are you in a similar situation? A first 30-minute consultation with Maître Zakine (45€) can save you months of proceedings — and often much more. Book an appointment →