Reference Decision: French Supreme Court • No. 83-12.493 • 1984-07-09 • View the decision →
Imagine: you buy a plot of land in Valbonne, in the Grasse hinterland, to build your dream home. The preliminary contract (sous seing privé) is signed in July on the basis of a plot classified as non-buildable land. Price: €100,000. But in the meantime, the local town planning plan changes: the land becomes buildable. At the notarised deed, signed in September, the seller does not change the price, but the property is now worth double. Have you been taken advantage of? The question every buyer asks is: can I seek annulment of the sale for lesion (i.e., because I paid a price too high compared to the real value)? And above all, from when does the deadline to act run?
The French Supreme Court, in a judgment of 9 July 1984 (No. 83-12.493), clearly answers: when the subject matter of the sale is modified between the preliminary contract and the notarised deed, the two-year period to bring an action for rescission for lesion runs from the date of signature of the notarised deed. In other words, it is the date of the final deed that counts, not that of the preliminary contract. A decision that can change everything for buyers and sellers, particularly in rapidly changing areas such as Sophia-Antipolis.
The Facts: A Story That Happens Every Day
Mr X, owner of a plot in Valbonne, sells it to Mr Y by preliminary contract on 10 July 1977. The land is then classified as non-buildable under the local land use plan (POS). Agreed price: 200,000 francs (approx. €30,500). But on 16 August 1977, the POS is modified: the plot switches to an undeveloped zone where the construction of individual houses may be authorised. On 20 September 1977, the notarised deed of sale is signed, now describing the land as 'buildable'. The price remains the same, but the value of the property has increased considerably.
Mr Y, the buyer, realises a few months later that he paid an excessive price compared to the real value at the date of the notarised deed. He sues Mr X for rescission for lesion (an action aimed at having the sale annulled because the price is less than seven-twelfths of the real value). The seller pleads limitation: according to him, the two-year period to act, provided for in Article 1676 of the Civil Code (which sets the limitation period for the rescission action), runs from the preliminary contract, i.e., 10 July 1977. However, Mr Y acts in 1979, more than two years after the preliminary contract.
The Grenoble Court of Appeal rules in favour of the buyer, considering that the period runs from the notarised deed. Mr X appeals to the Supreme Court. The Supreme Court dismisses his appeal and upholds the Court of Appeal's decision. For the Court, the modification of the subject matter of the sale (non-buildable land becoming buildable) justifies that the period only begins at the notarised deed, because it is at that moment that the buyer can truly assess the value of the property.
The Reasoning of the Court — Analysed
The French Supreme Court relies on Article 1676 of the Civil Code, which provides that 'the action for rescission for lesion must be brought within two years from the day of the sale'. But what is the day of the sale? In principle, it is the date of the notarised deed, since it is the deed that transfers ownership. However, in practice, the preliminary contract is often considered the starting point, especially if the parties have agreed on a perfect sale from that deed.
Here, the Court innovates by specifying that if the subject matter of the sale is modified between the two deeds, the period runs from the notarised deed. Why? Because the modification changes the very nature of the property: the plot, initially non-buildable, becomes buildable. This is an 'essential quality of the thing sold', as the Court emphasises. The buyer cannot know the true value of the property before the notarised deed, since the change in zoning occurred in the meantime.
Note, however: this reasoning is not a reversal of precedent, but a consistent application of the rules of sale. The Court recalls that the preliminary contract is only a promise of sale, and that only the notarised deed completes the transfer of ownership. In case of modification of the subject matter, it is therefore the date of the notarised deed that must be retained. The seller's arguments (legal certainty, respect for the legal deadline) are dismissed in favour of protecting the injured buyer.
undefined, I have encountered cases where buyers in Sophia-Antipolis were surprised by an evolution of the local town planning plan (PLU) between the preliminary contract and the notarised deed. Without this case law, they would have lost any recourse.
What This Changes for You — Concretely
For the buyer (the one who purchases): If you sign a preliminary contract on land, and in the meantime a planning modification (or any other change affecting value) occurs, you have two years from the notarised deed to check whether the price is less than seven-twelfths of the real value. For example, if the land was worth €200,000 at the notarised deed but you paid €100,000, the lesion is established (because €100,000 < €200,000 × 7/12 = €116,666). You can then seek rescission (annulment) or an additional price.
For the seller: You must be careful: if you sell a property whose value may change between the preliminary contract and the notarised deed (change of zoning, building permit obtained, etc.), you risk a rescission action even if the preliminary contract dates back more than two years. Ensure that the price matches the value at the date of the notarised deed, or provide for a price revision clause.
Concrete example in Sophia-Antipolis: A developer buys a building plot by preliminary contract in January 2020 for €500,000, in a non-buildable zone. In March 2020, the PLU is modified and the land becomes buildable, value €800,000. The notarised deed is signed in June 2020. The seller can bring a rescission action until June 2022, not January 2022.
Four Tips to Avoid This Type of Dispute
- Carry out a planning study before the preliminary contract: Check the current classification of the land and the planned evolution of the PLU with Valbonne town hall or the urban community. This will avoid nasty surprises between the two deeds.
- Insert a price variation clause: In the preliminary contract, provide that the price may be revised if the subject matter of the sale is modified (buildability, area, etc.) before the notarised deed. This secures both parties.
- Have the property valued by an expert: Just before the notarised deed, request a new valuation to ensure the price is still in line with the real value. If a gap of more than seven-twelfths appears, withdraw from the sale or renegotiate.
- Respect limitation periods: If you think you have been prejudiced, act quickly. The two-year period runs from the notarised deed, but do not wait until the last moment. Consult a lawyer at the first doubt.
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Further Details: Related Case Law and Developments
This 1984 decision is part of a line protective of buyers. The French Supreme Court had already ruled, in a judgment of 20 February 1979, that the limitation period for the rescission action runs from the notarised deed when the preliminary contract is not a definitive sale contract. But here it goes further by taking into account the modification of the subject matter.
Since then, other decisions have clarified the notion of 'modification of the subject matter': for example, a change in area (judgment of 12 May 1998) or the obtaining of a building permit after the preliminary contract (judgment of 17 March 2004). The trend is therefore to extend this protection to cases where the value of the property is affected by an event subsequent to the preliminary contract.
What few people know is that this case law can also apply to sales of condominium units, if the condominium regulations are modified between the two deeds.
What You Absolutely Must Remember
FAQ:
- From when does the deadline to bring a rescission action for lesion run? In principle, from the day of the notarised deed. But if the subject matter of the sale is modified between the preliminary contract and the notarised deed, it is the date of the notarised deed that counts, even if the preliminary contract is older.
- Can I still act if the preliminary contract was signed more than two years ago? Yes, if the notarised deed was signed less than two years ago, because the period runs from the latter. Be careful to prove the modification of the subject matter.
- What should I do if I discover that the land has become buildable after the preliminary contract? Consult a lawyer specialised in property law. You can request an expert appraisal to assess the real value at the date of the notarised deed, then bring a rescission action if the lesion is established.
- Can the seller defend himself? Yes, he can challenge the reality of the modification or demonstrate that the buyer was aware of the change before the notarised deed. However, case law tends to favour the buyer.
- What is the risk for the seller? The seller risks annulment of the sale or payment of an additional price (difference between the price paid and seven-twelfths of the real value). He may also be ordered to pay costs and damages.
Are you in a similar situation? A 30-minute initial consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →

