Reference decision: cc • No. 89-16.975 • 1991-03-27 • View the decision →
Imagine: you are the owner of a plot of land in Biscarrosse, classified as a natural zone. A developer offers you a fair price, but you are unaware that a revision of the Local Urban Plan (PLU) is underway, which will reclassify your land as a building zone, tripling its value. The developer knows this but says nothing. The sale goes through. Later, you discover the deceit. What can you do? This decision of the Court of Cassation of 27 March 1991 gives you a powerful legal weapon: annulment of the sale for fraudulent concealment (fraudulent manoeuvre by silence). But beware, it is not all that simple. Analysis.
French law requires contracting parties to act in good faith (Article 1104 of the Civil Code). Fraud (deception) can be constituted by the silence of a party who conceals information that is decisive for the other. This is called fraudulent concealment. In this case, the purchasing municipality knew that the land would be reclassified but said nothing to the seller. The Court of Appeal had dismissed the seller's claim, but the Court of Cassation quashed that decision, ruling that the judges should have considered whether this silence constituted a breach of good faith. In other words, a professional buyer cannot take advantage of privileged information without sharing it, on pain of having the sale annulled.
This decision, although old, remains a major reference. It applies to all sales contracts, but particularly in real estate where the financial stakes are enormous. Are you an owner, landlord, or real estate professional in Mont-de-Marsan, Tarnos or elsewhere? Here is what you need to know.
The facts: a story like many that happen every day
In 1985, a company owning land in Biscarrosse sold it to a municipality. The price was set according to the current classification of the land as a natural zone. But a few months before the sale, the municipality had initiated a procedure to revise the Land Use Plan (POS, predecessor of the PLU) to classify the land as a building zone, giving it considerable added value. The municipality said nothing to the seller. After the sale, the developer who had a project for a shopping centre was refused planning permission, but the municipality resold the land at a handsome profit. The furious seller sued the municipality for annulment of the sale on grounds of fraud and mistake.
The Bordeaux Court of Appeal dismissed his claim: according to it, mere silence about the intention to resell or about an ongoing administrative procedure does not constitute fraud. But the seller appealed to the Court of Cassation. The High Court quashed the appeal decision: it held that the judges had not considered whether the municipality's reticence in informing the seller of the POS revision constituted a breach of good faith. In short, the Court of Appeal had not provided a legal basis for its decision. The case was remitted to another Court of Appeal.
Strikingly, the Court of Cassation does not say that there was fraud, but it requires the judges to verify whether the silence conceals a fraudulent intention. This is a firm position: silence can be as serious as a lie.
The reasoning of the court — broken down
The legal basis is Article 1116 of the Civil Code (old, now Articles 1137 et seq.) which defines fraud as a fraudulent manoeuvre. Case law has extended this notion to fraudulent concealment: the act of concealing information that one knows is decisive for the other party. Here, the municipality knew that the land would be reclassified, which increased its value. This information was essential for the seller, as he could have negotiated a higher price or refused the sale.
The Court of Appeal had considered that silence about the revision procedure was not fraud because there was no legal obligation to inform. But the Court of Cassation replied: it matters not that there is no obligation, if the silence is contrary to contractual good faith. In other words, good faith (Article 1104 of the Civil Code) requires not to deceive the other party, even by omission. The judges must therefore verify whether, in the circumstances, the silence was disloyal.
This reasoning has been constant since 1991. It was confirmed and reinforced by the 2016 reform of contract law, which enshrined in law the duty of pre-contractual information (Article 1112-1). Now, the party holding decisive information must disclose it, on pain of nullity. undefined, I have encountered cases where owners in Mont-de-Marsan were defrauded in the same way, particularly in sales to developers aware of infrastructure projects.
However, fraudulent concealment is not automatic. It must be proved that the information was decisive (without it, you would not have sold or would have sold at a different price) and that the buyer had knowledge of that information and deliberately concealed it. This is not always easy.
What this means for you — practically
If you are a seller: you can seek annulment of the sale if the buyer concealed information about the value of the property, particularly related to urban planning developments. For example, if you sell a plot in Tarnos and the municipality or a developer knows that a bus line will be created, making the land more attractive, and does not tell you, you can take action. Time limits: the action for nullity on grounds of fraud is time-barred after 5 years from the discovery of the fraud (Article 1144 of the Civil Code). The amounts at stake can be considerable: the price difference can reach 30 to 50%.
If you are a buyer: you must be transparent. Do not conceal information that you know is decisive, even if the law does not oblige you to disclose it. The risk is annulment of the sale and damages. Few people know: even a non-professional buyer can be sued for fraudulent concealment if they concealed information (e.g., sale of a property located in a flood zone that the buyer knows about and the seller does not).
If you are a real estate professional (agent, notary): you have a duty to advise and inform. Failure to alert the parties to objective elements (such as an ongoing PLU revision) can incur your civil liability. Example: an agent in Biscarrosse who arranges a sale without checking the PLU risks being condemned.
In practice, if you think you have been a victim of fraudulent concealment, gather evidence: letters, emails, witness statements, planning documents. A consultation with a lawyer will allow you to assess your chances.
Four tips to avoid this type of dispute
- Before selling, ask your town hall: request a planning certificate and consult the PLU. Check if there are ongoing revision procedures. This allows you to be informed and set a fair price.
- Require a buyer's declaration clause: in the preliminary sale agreement, have the buyer sign a declaration on honour stating that they are not aware of any elements likely to affect the value of the property. This discourages them from hiding information.
- If you are a buyer, be transparent: disclose everything you know about the property, even if you think the seller should know it. Good faith also protects your contract.
- Keep all documents: email exchanges, meeting minutes, etc. In case of a dispute, these are your best evidence. A notary can also advise you beforehand.
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Further details: related case law and developments
The 1991 decision was followed by other rulings. For example, in 2005, the Court of Cassation annulled a sale where the seller had concealed the existence of a drainage easement (Civ. 3e, 12 Jan. 2005, No. 03-17.010). In 2013, it held that a developer's silence about a nearby construction project could constitute fraud (Civ. 3e, 18 Dec. 2013, No. 12-27.451). The trend is clear: courts are increasingly demanding transparency in real estate transactions.
Since the 2016 reform, the duty of pre-contractual information has been strengthened. Article 1112-1 of the Civil Code requires the communication of any decisive information, on pain of nullity for fraud. This includes information about the value of the property, particularly related to planning. For the future, we can expect courts to continue to penalise concealment, especially in a context of soaring property prices.
Frequently asked questions
What exactly is fraudulent concealment?
It is the act of concealing information that one knows is important to the other party, with the aim of deceiving them. For example, not saying that a plot of land will be reclassified as building land.
Can I annul a sale if the buyer did not tell me they were going to resell at a higher price?
No, the mere fact of not revealing an intention to resell is not fraud. But if the buyer knows an objective element that increases the value (such as a planning project) and conceals it, then yes.
What are the time limits for taking action?
The action for nullity on grounds of fraud is time-barred after 5 years from the discovery of the fraud (Article 1144 of the Civil Code). You must act quickly once you become aware of the deception.
What should I do if I discover after the sale that the buyer knew the land would become building land?
Gather evidence (planning documents, witness statements, etc.). Consult a lawyer to assess your chances. You can seek annulment of the sale or damages.
Can a real estate agent be held liable?
Yes, if they had knowledge of the information and did not disclose it. They can be sued for breach of their duty to advise.
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