Reference Decision: cc • No. 97-82.569 • 1998-11-04 • View the decision →
Imagine this: you have just bought a nice house in Villeurbanne, with a large garden full of trees. Your neighbour, a property developer, obtains planning permission for a three-storey building. The trees bordering your land are felled overnight. You later discover that this permission was obtained by lying about the state of the land. You feel cheated, but the developer tells you: "I have permission, everything is legal." Is that really the case?
Hundreds of owners, tenants and property professionals ask themselves this question every year. Yet the answer has been clear since a ruling of the Court of Cassation of 4 November 1998 (No. 97-82.569): a planning permission obtained fraudulently is equivalent to having no permission. In other words, the permission does not legally exist, and its holder cannot rely on it to escape criminal prosecution for building without permission.
But what exactly does that change? How should you react if you are a victim of such fraud? And above all, how can you avoid it? Let us delve into this landmark decision, explained for non-lawyers.
The facts: a story that happens every day
Let us go back to 1989, in Villeurbanne, a suburb of Lyon. SMCI (Société de Construction Immobilière), a developer, plans to build a block of flats on a wooded plot. To obtain planning permission, it must comply with the local urban plan (PLU) which protects certain trees. But instead of working around the vegetation, SMCI has the trees felled before even submitting its application. Permission is granted on 16 June 1989, based on a file that does not mention this fraudulent destruction.
The neighbouring owners, including Mr. X, challenge the permission before the administrative court. They succeed: the permission is annulled for fraud. But in the meantime, SMCI has already built the building. The neighbours bring a criminal complaint for breach of the planning code (building without valid permission). The developer defends itself by arguing that at the time of the works, the permission existed and had not yet been annulled.
The Lyon Criminal Court, and then the Lyon Court of Appeal, sentence SMCI to a fine of 500,000 francs (about €76,000) and order publication of the judgment. The developer appeals to the Court of Cassation. The Court of Cassation dismisses its appeal on 4 November 1998, confirming that the fraud vitiates the permission from the outset, rendering it legally non-existent. The developer cannot therefore hide behind a permission obtained by deception.
The reasoning of the court — explained
In its judgment, the Court of Cassation relies on Articles L. 421-1 and L. 480-4 of the Planning Code (in their version then in force). Article L. 421-1 subjects any construction to planning permission. Article L. 480-4 penalises building without permission or in breach of permission with a fine. But the developer invoked a classic rule: as long as an administrative act (the permission) has not been annulled, it is deemed lawful. This is known as the presumption of legality.
The Court responds with an irrefutable argument: if the permission was obtained by fraud, it is void from the outset (this is called absolute nullity). The fraud is characterised by the felling of trees to deceive the administration. Consequently, the permission never legally existed. The builder is therefore in the same situation as if he had never had permission: he committed an offence from the start of the works.
What few people know is that this solution is not a surprise. The Court of Cassation had already ruled, in a judgment of 18 October 1989, that a permission obtained by fraud cannot cover the works. The 1998 judgment confirms and clarifies this precedent. The lower courts (criminal court and court of appeal) had properly applied this principle. The Court of Cassation validates their reasoning and adds that publication of the judgment (in a local newspaper) is a justified supplementary penalty to inform the public of the fraud.
In short, fraud prevents the permission from producing its protective effects. The developer cannot say: "I followed the procedure, I have permission." If that permission is tainted by deception, it is worthless.
What this means for you — practically
This decision has very practical implications for several profiles. If you are a landlord owner in Chambéry, and your tenant tells you that the neighbour is building a wall encroaching on your land, but the neighbour brandishes a permission: do not be intimidated. If you prove that the permission was obtained by lying (for example, by declaring a smaller area than reality to avoid an impact study), this permission is legally non-existent. You can bring a criminal complaint for building without permission, even if the permission has not yet been annulled by the administrative judge.
If you are a purchaser of a recent property, check the circumstances in which the permission was obtained. Fraud can lead to hidden defects (e.g. non-compliant construction) or criminal prosecution of the seller, which can block a resale. undefined, I have come across cases where developers "forgot" to mention protected trees. Result: years of proceedings and fines of several tens of thousands of euros.
For co-owners: if your management company carries out works with a permission, and a co-owner discovers fraud (e.g. alteration of plans without authorisation), the permission can be challenged. If it is annulled, the works become illegal, and the co-ownership may be ordered to restore the premises, with considerable costs.
A concrete example: in Chambéry, a developer built 12 flats using a permission obtained by understating the building's height. The permission was annulled for fraud. The developer had to pay a fine of €80,000 and demolish the top floor. Total cost: over €300,000.
If you are in this situation, you must act quickly. The limitation period for criminal action for building without permission is 6 years from completion of the works (Article 8 of the Code of Criminal Procedure). But for an action to annul the permission before the administrative court, the deadline is 2 months from the display of the permission. So you must react immediately upon discovering the fraud.
Four tips to avoid this type of dispute
- Consult the Certificate of Urban Planning before buying land: This document, issued by the town hall, tells you the applicable rules (protected areas, easements, etc.). Do not rely solely on the seller's statements.
- Have a joint condition survey carried out before works: Photograph the land, count the trees, note their species and diameter. In the event of subsequent fraud, this evidence will be crucial.
- Check your neighbour's planning permission: The permission is displayed on the site throughout the works. Take a photo of the display. If something seems suspicious (e.g. declared area inconsistent), contact the town planning officer at the town hall or a lawyer.
- If in doubt, act within 2 months: An appeal against a planning permission before the administrative court must be lodged within 2 months of the first day of display. After that, it is too late to challenge the permission itself. You can still report the fraud criminally, but obtaining demolition will be more difficult.
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Further reading: related case law and developments
The 1998 judgment is part of a consistent line of case law from the Court of Cassation. Already in a judgment of 18 October 1989 (No. 88-86.206), it held that "planning permission obtained by fraud cannot exempt the builder from criminal prosecution." The same solution has been applied to other planning authorisations, such as demolition permits (Cass. crim., 12 March 1997).
More recently, the Court of Cassation extended this principle to preliminary declarations of works (Cass. crim., 8 March 2016, No. 15-80.857): if you lie about the nature of the works (e.g. you declare an extension of 20 m² when it is 50 m², which requires a permission), the preliminary declaration is void. You are then considered to have built without authorisation.
The trend is therefore towards strictness: judges tolerate no deception in obtaining planning authorisations. However, be careful: the fraud must be proved. A simple oversight or material error is not enough. An intention to deceive the administration (mental element) must be demonstrated.
Checklist before acting
FAQ: practical questions
- Q: I suspect my neighbour obtained his permission by lying. What should I do?
R: Gather evidence (photos, witness statements, documents). Consult a lawyer specialising in property law. You can apply to the administrative court within 2 months of the display to seek annulment of the permission, and file a criminal complaint for building without permission. - Q: Can I obtain demolition of the fraudulent construction?
R: Yes, if the permission is annulled and the construction is irregular. The criminal court can order demolition (Article L. 480-5 of the Planning Code). But this is an exceptional measure, especially if the construction is completed and the occupants are in good faith. - Q: What are the time limits for acting?
R: To challenge the permission: 2 months from display. For criminal action: 6 years from completion of the works. To claim damages: 5 years from discovery of the damage (Article 2224 of the Civil Code). - Q: How much does a procedure cost?
R: Lawyer's fees vary depending on complexity. Expect between €1,500 and €5,000 for an annulment proceeding, and more if combined with criminal action. However, costs can be recovered if you win (the opponent is ordered to pay costs). - Q: What if the builder is a company that has been wound up?
R: You can pursue the directors personally if they participated in the fraud. It is also possible to hold the latent defects insurer liable if the construction has defects.
Are you in a similar situation? A first 30-minute consultation with Maître Zakine (€45) could save you months of proceedings — and often much more. Book an appointment →
📌 Does this apply to your situation? Maître Cécile Zakine, French real estate lawyer, practises throughout France.
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