Change of Use of a Building: When Works Are Required

Imagine: you are the owner of a former student accommodation building in Canet-en-Roussillon. The students have left, the building remains empty. You decide to convert it into a hotel-residence, without touching a wall, without a lick of paint. You let the furnished rooms to tourists. Everything is fine until the day the mayor serves you with a summons for a breach of the French Planning Code (the set of rules governing land use and construction). But is it really illegal? The answer depends on a crucial detail: have you carried out any works?

This question was answered by the French Supreme Court (Cour de cassation) on 18 May 2004, in a case between an owner and the administration. The change of use of a building (i.e., its new purpose, for example from student housing to a hotel) is an offence only if works have been carried out to achieve it. In other words, if you simply change the use without any construction, you are not in breach.

This decision is a breath of fresh air for many owners, but beware: it does not allow you to do anything. Planning law is complex, and each situation deserves careful consideration. I will explain step by step what this case law means concretely for you, whether you are an owner in Saint-Estève, in Perpignan or elsewhere.

The Facts: A Story That Happens Every Day

Mr. X is the owner of a building in Canet-en-Roussillon, originally built as student accommodation. The building comprises furnished rooms, common parts, a communal kitchen. The students leave, and Mr. X thinks: why not rent these rooms to tourists? He does nothing, no works, no planning permission (administrative authorisation to carry out works). He starts renting the rooms by the night, as a hotel-residence.

Problem: the municipality considers that this change of use (from student accommodation to hotel-residence) required planning permission, because in its view there was a change of purpose (the purpose of a building is its use prescribed by planning rules). The mayor issues a summons and brings proceedings against Mr. X in the criminal court (tribunal correctionnel, which tries criminal offences). Mr. X is convicted at first instance, then on appeal. He appeals to the Cour de cassation.

The Cour de cassation quashes (annuls) the judgment of the Paris Court of Appeal. It considers that the lower courts did not establish the existence of works that had the effect of changing the use. However, Article L. 421-1 of the Planning Code (now replaced, but the spirit is the same) requires planning permission for works that change the purpose of a building. No offence without works. The Court of Appeal had therefore inadequately reasoned its decision.

The Reasoning of the Court — Analysed

The reasoning of the Cour de cassation is based on a strict interpretation of Articles L. 421-1, paragraph 2, and L. 480-4 of the Planning Code (old version). These provisions punish the carrying out of works without planning permission, when those works have the effect of changing the purpose of a building. The Court says in essence: 'For there to be an offence, there must be works. A mere change of use, without works, is not covered by these provisions.'

Note, however, that this is not a carte blanche. Other rules may apply. For example, a change of use (without works) may be subject to authorisation in certain areas, particularly in municipalities with a local development plan (Plan Local d'Urbanisme, PLU) which regulates uses. But here the Cour de cassation distinguishes between a change of purpose (which is a modification of the use category within the meaning of the Planning Code) and a change of use (which is a more factual change, such as moving from long-term letting to short-term letting). In short, the high court reminds that criminal planning law is strictly construed: one can only punish what is expressly prohibited.

In this case, the Court of Appeal had convicted Mr. X without demonstrating that he had carried out works. It had merely noted the change of use. The Cour de cassation criticises it for a lack of legal basis: the lower courts did not enable the cour de cassation to verify that the law had been correctly applied. This is an important reminder: to convict an owner, the works must be proved.

What few people know is that this decision is part of a protective line for owners' rights. The Cour de cassation ensures that the administration cannot penalise a mere change of activity without works, unless a specific provision of the PLU or national regulations requires it.

What This Means for You — Concretely

If you are the owner of a building in Saint-Estève and you wish to convert an old garage into a dwelling, or a commercial premises into a home, this decision concerns you. It means that if you carry out no works of conversion (no partitions, no windows, no structural changes), the change of use may not require planning permission. On the other hand, if you start digging, building, modifying facades, then permission will likely be necessary.

Let's take a concrete example: in Perpignan, an owner lets a former 50 m² office as furnished accommodation, without any works. He simply changes the use. If he has no permission, can the administration prosecute him? According to this decision, no, because there are no works. But beware: the regulations of the PLU of Perpignan may impose prior authorisation for any change of purpose, even without works. So you must check the local planning document.

For tenants: you are not directly concerned, but if your landlord changes the use of the building without works, this may affect the validity of the lease (rental contract) or the service charges. For example, if your home changes from residential to tourist accommodation, your lease could be called into question.

For buyers: before purchasing a property, check its declared use. If the previous owner changed the use without works, you could inherit a situation that is irregular under the PLU. undefined, I have encountered cases where the buyer had to regularise afterwards, with architect's fees and taxes.

For co-owners: if a co-owner converts his lot (private part of a building in co-ownership) into a tourist residence without works, the other co-owners can object if the co-ownership rules prohibit commercial activity.

Four Tips to Avoid This Type of Dispute

• Consult the PLU of your municipality before any change. The local development plan defines the authorised uses (residential, commercial, hotel accommodation…). In Canet-en-Roussillon, for example, certain zones protect student housing. A mere change of use without works may be prohibited by the PLU.
• Distinguish carefully between 'change of use' and 'change of purpose'. The former may be free (unless the PLU provides otherwise), the latter often requires permission if works are carried out. If in doubt, request a planning certificate (certificat d'urbanisme, an informative document issued by the town hall) which sets out the rules applicable to your land.
• Have a survey carried out before any works. If you plan works, even minor ones, consult an architect or a lawyer lawyer. A simple partition can be considered as works modifying the purpose.
• Keep all evidence of the initial state. Photographs, plans, technical surveys: in case of inspection, you will need to show that no works were carried out. The administration has three years to act (limitation period).

Further Analysis: Related Case Law and Developments

This 2004 decision has been confirmed by other judgments. For example, the Cour de cassation (3rd Civil Chamber) held in 2012 that a change of use from commercial premises to residential use without works does not require planning permission (Civ. 3e, 13 June 2012, No. 11-17.942). On the other hand, the Conseil d'État (highest administrative court) takes a stricter view: for it, certain changes of use, even without works, may be subject to authorisation if the planning regulations so provide (CE, 22 June 2015, No. 370651).

The current trend is therefore towards caution. The judicial courts (like the Cour de cassation) protect the owner who has not carried out works, but the administrative courts may impose authorisations if the PLU is restrictive. This is a divergence you need to be aware of.

For the future, the ALUR law (Law for Access to Housing and Renovated Urban Planning) of 2014 strengthened controls on tourist lettings, particularly in Paris. But in towns like Perpignan or Saint-Estève, the regulations are less strict. This case law therefore remains relevant for the majority of territories.

Summary and Next Steps

FAQ:

• Can I convert my garage into a studio without planning permission? Yes, if you carry out no works. But check the PLU: in Saint-Estève, a garage is often considered an annexe, and converting it into a dwelling may be prohibited without authorisation.
• What should I do if the administration prosecutes me for a change of use without works? You can rely on this case law. It is advisable to instruct a lawyer specialising in planning law.
• What are the risks if I carry out works without planning permission? Fine of up to €300,000, demolition, imprisonment in the most serious cases. Better to regularise beforehand.
• Does this decision apply to holiday lettings? Yes, if the change of use is without works. But beware of the regulations on tourist accommodation (declaration to the town hall, limitation on duration).

Checklist:

1. Identify the desired change (use or purpose?)
2. Consult the PLU at the town hall or on the municipality's website.
3. If works are planned: apply for planning permission or a preliminary declaration.
4. If no works: check that no authorisation is required by the PLU.
5. Keep all documents (photos, PLU, correspondence).

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