Buying property in France is exciting. It is also the single largest transaction most people will ever make. And the hardest part for a foreign buyer is often not the price or the location — it is knowing what the seller should have told you but did not.

French law imposes a dense set of disclosure obligations on property sellers. Some are mechanical: the law requires a file of mandatory diagnostic reports, from the energy performance certificate (diagnostic de performance énergétique or DPE) to the termite survey. Others are more subtle: the seller must voluntarily disclose any information that could sway your decision to buy, even if you never thought to ask. And when the seller stays silent, the law gives the buyer several distinct — and sometimes cumulative — remedies.

This article explains what a French property seller must disclose, what happens when they do not, and how a foreign buyer can protect themselves before signing. It is written for non-French nationals — investors, second-home buyers, retirees — who may encounter these rules for the first time.

I. The Seller’s Pre-Contractual Duty to Inform

A. The General Obligation: Article 1112-1 of the Civil Code

Since the 2016 reform of French contract law, the Civil Code has contained a general pre-contractual duty of information. Article 1112-1 of the Civil Code states that a party who knows information whose importance is decisive for the other party’s consent must disclose it. The obligation arises when the other party legitimately does not know the information or places trust in its contracting partner.

This is not a passive rule. It requires the seller to volunteer information — not merely answer questions truthfully. The only carve-out concerns the estimation of the value of what is being sold: a seller need not tell you that, in their view, the property is overpriced. Everything else — the physical condition of the building, its legal status, its rental history, known defects, neighbourhood disputes, planned public works, the true surface area — falls within the duty if it would matter to a reasonable buyer.

Critically, the text adds that « Les parties ne peuvent ni limiter, ni exclure ce devoir » — the parties cannot limit or exclude this duty. Any clause in a compromis de vente (preliminary sale agreement) that purports to waive the seller’s obligation to inform is void. This is a matter of public policy, and the Cour de cassation treats it as such.

The practical implication for a foreign buyer is this: if, after the sale, you discover something the seller knew but did not tell you — structural damp, an unresolved boundary dispute, the fact that the roof leaks every winter — you have a statutory path to compensation or even annulment of the sale. You need not prove a lie. Silence, when the seller knew the information was decisive for you, is enough.

The French Cour de cassation confirmed a closely related principle in a published decision on 23 September 2020: an action for fraudulent misrepresentation (dol) is not exclusive of the action under the statutory warranty against hidden defects (garantie des vices cachés). The court held that « l’action en garantie à raison des défauts cachés de la chose vendue n’est pas exclusive de l’action en responsabilité délictuelle fondée sur le dol ou la réticence dolosive commis avant ou lors de la conclusion du contrat » — the action for hidden defects does not bar a concurrent claim in tort for fraud or fraudulent concealment committed before or during the conclusion of the contract (Cass. 3e civ., 23 Sept. 2020, no. 19-18.104, Publié au Bulletin). A buyer can pursue both theories simultaneously, which is a significant tactical advantage in litigation.

B. The Mandatory Diagnostic File: Article L271-4 of the Construction and Housing Code

In addition to the general duty to inform, French law requires every seller of a built property to compile and annex to the sale agreement a dossier de diagnostic technique (DDT) — a file of mandatory diagnostic reports. The list is set out in Article L271-4 of the Construction and Housing Code and currently includes twelve items.

The most important for a foreign buyer are:

The energy performance certificate (DPE), defined by Article L126-26 of the same code, which rates the property from A (most efficient) to G (least efficient) and is valid for ten years. Since 1 July 2021, the DPE is opposable — meaning the buyer can sue on it if the information is incorrect. A 2026 regulatory change recalculated the coefficient for electric heating, reclassifying roughly 850,000 homes out of the worst categories with no renovation work required. For a foreign buyer purchasing what appears to be an F or G property, it is worth checking whether an updated certificate would change the rating — which may also change the legal obligations attached to the property.

The lead exposure report (CREP), mandatory for buildings constructed before 1949.

The asbestos survey, required for buildings whose construction permit was issued before July 1997.

The termite and wood-destroying insect report, required in designated geographical zones. A 2022 decision of the Cour de cassation illustrates the consequences of failure in this area: a syndicat des copropriétaires (co-ownership association) was held liable for damage caused by a termite infestation that its managing agent had failed to disclose to the notary handling a sale. The court applied the principle that « le syndicat des copropriétaires est responsable à l’égard des copropriétaires ou des tiers des fautes commises par le syndic, son mandataire, dans l’exercice de ses missions » — the co-ownership association is liable for faults committed by its managing agent within the agent’s duties (Cass. 3e civ., 15 June 2022, no. 21-16.223).

The gas installation report and electrical installation report, required for installations older than fifteen years.

The natural and technological risk statement (état des risques), which tells you whether the property sits in a flood zone, a seismic zone, near a Seveso-classified industrial site, or in an area subject to a natural risk prevention plan (PPRN).

The sanitation report, covering whether the property is connected to the mains sewer or uses a private system, and whether that system complies with regulations.

The law draws a sharp distinction between the consequences of missing diagnostics. Under Article L271-4 II, if at the time of the notarised deed any of the lead, asbestos, termite, gas, electrical, or sanitation reports are absent or out of date, « le vendeur ne peut pas s’exonérer de la garantie des vices cachés correspondante » — the seller cannot exclude liability for the corresponding hidden defects. That is a powerful protection: the seller cannot hide behind a standard exclusion clause for the very problems the missing report was meant to catch.

If the natural risk statement or the safety and sanitation orders are missing, the buyer may seek « la résolution du contrat ou demander au juge une diminution du prix » — either rescission of the contract or a price reduction ordered by the court.

For the DPE specifically, the law states that the buyer « ne peut se prévaloir à l’encontre du propriétaire des recommandations accompagnant le diagnostic de performance énergétique » — the buyer cannot sue the seller on the basis of the DPE’s recommendations, which are purely indicative. But the energy class itself, the consumption figures, and the greenhouse gas emission data are binding, and the certificate must be annexed to both the compromis and the final deed.

For a foreign buyer, the practical takeaway is straightforward: never sign a compromis de vente without first reading every page of the DDT. If a report is missing, demand it. If one is stale — a DPE dated 2015, an asbestos report from a decade ago — ask for a new one before committing. The cost of the diagnostics is, by law and by custom, borne by the seller.

II. Legal Remedies When the Seller Stays Silent

A. The Warranty Against Hidden Defects: Articles 1641 to 1643 of the Civil Code

The garantie des vices cachés (warranty against hidden defects) is the oldest buyer protection in French law, dating from the Napoleonic Code of 1804. Article 1641 of the Civil Code provides that « le vendeur est tenu de la garantie à raison des défauts cachés de la chose vendue qui la rendent impropre à l’usage auquel on la destine, ou qui diminuent tellement cet usage que l’acheteur ne l’aurait pas acquise, ou n’en aurait donné qu’un moindre prix, s’il les avait connus » — the seller warrants the thing sold against hidden defects that render it unfit for its intended use, or that diminish that use to such an extent that the buyer would not have bought it, or would have paid less, had they known.

Three conditions must all be met: the defect must be hidden — not apparent on a reasonable inspection; it must predate the sale; and it must be serious enough to affect the use of the property. A leaking tap does not qualify; a roof that caves in every winter, a foundation that is sinking, or a septic system that discharges into the neighbour’s garden does.

Article 1643 then draws a distinction that is crucial for foreign buyers to understand. If the seller knew about the defect, they are liable for all damages, including the return of the price and consequential losses. If the seller did not know, they are still liable — unless the sale contract includes an exclusion clause. The text is blunt: « il est tenu des vices cachés, quand même il ne les aurait pas connus, à moins que, dans ce cas, il n’ait stipulé qu’il ne sera obligé à aucune garantie » — the seller is liable for hidden defects even if they did not know about them, unless the contract says otherwise.

This is where the professional status of the seller matters enormously. A property developer, a builder, or a company that regularly buys and sells real estate is a vendeur professionnel and is presumed to know the defects. They cannot rely on a clause excluding liability against a non-professional buyer.

The Cour de cassation confirmed this principle in a 2022 decision that reversed an appellate ruling for failing to distinguish between a professional seller and a professional buyer. The court held that a clause limiting or excluding the warranty against hidden defects « est opposable à un acheteur professionnel de même spécialité que celui qui lui vend la chose » — is enforceable against a professional buyer of the same specialty (Cass. 3e civ., 4 March 2021, no. 20-10.657). For a foreign individual buying a holiday home or a rental investment, an exclusion clause buried in the fine print will almost never be enforceable if the seller is a professional.

The buyer must act within two years of discovering the defect (Article 1648 of the Civil Code), and within twenty years of the sale itself. The clock starts running from the day you discover the problem, not the day of the sale — but you must bring the claim promptly after discovery.

In a separate 2022 decision, the Cour de cassation also reminded the lower courts that the professional status of the seller imposes duties that extend well beyond the sale itself. A seller who divided a commercial building into units and sold them without the required fire-safety inspections was presumed to know the resulting defects, because it had commissioned the work. The court held that this presumption « ne pouvait être écartée sans rechercher si cette qualité ne lui imposait pas de procéder à des vérifications élémentaires » — could not be set aside without examining whether the buyer’s own professional status also required it to carry out basic checks (Cass. 3e civ., 26 Jan. 2022, no. 18-23.578). Between two professionals of the same field, an exclusion clause may stand. Between a professional seller and a private buyer, it rarely does.

B. Fraudulent Misrepresentation: Article 1137 of the Civil Code

Even when the conditions for the garantie des vices cachés are not satisfied — the defect is not serious enough, or the two-year limitation period has passed — a buyer may still succeed on the ground of dol, the French law equivalent of fraudulent misrepresentation.

Article 1137 of the Civil Code defines dol as « le fait pour un contractant d’obtenir le consentement de l’autre par des manoeuvres ou des mensonges » — obtaining the other party’s consent through schemes or lies. The text adds a second, vital limb: « constitue également un dol la dissimulation intentionnelle par l’un des contractants d’une information dont il sait le caractère déterminant pour l’autre partie » — intentional concealment of information the party knows to be decisive for the other is also fraud.

This is réticence dolosive: silence that amounts to fraud. It does not require an active lie. It requires proof that the seller knew the information, knew it was decisive, and chose to say nothing. The buyer must also show that the concealed information would have changed their decision — either they would not have bought, or they would have bought at a lower price.

The Cour de cassation has drawn the practical contours of this doctrine through a series of decisions that are directly relevant to foreign buyers. In a 2020 case, the court upheld a finding of réticence dolosive against sellers who had covered damp walls with three layers of wallpaper before putting the house on the market. The buyers discovered severe humidity and mould immediately after moving in, when the wallpaper began to peel. The court held that the sellers’ deliberate concealment of the problem — which they necessarily knew about, having applied the wallpaper themselves — constituted fraud even though the damage was not severe enough to trigger the garantie des vices cachés. The court noted that « lorsqu’une partie invoque le dol en demandant uniquement la réparation du préjudice causé par ce vice du consentement, le juge peut, sans se prononcer expressément sur le caractère intentionnel de la réticence dolosive, accorder des dommages-intérêts sur la base d’un manquement à l’obligation pré-contractuelle d’information du vendeur » — when a party claims fraud seeking only damages, the judge may award compensation for breach of the pre-contractual duty to inform without expressly ruling on the intentionality of the concealment (Cass. 3e civ., 1 Oct. 2020, no. 19-21.051).

This is a subtle but crucial point: the burden of proving dol — with its requirement of intentionality — is softened when the claim is framed as a breach of the Article 1112-1 duty to inform, which merely requires that the seller knew the information and failed to disclose it. The two actions can and should be pleaded together.

There are limits. In a 2020 decision, the Cour de cassation rejected a dol claim by a buyer who had purchased shares in a property-holding company and later discovered that nearly half the land was not owned by the company. The court noted that the buyer « sur qui repose une obligation pré-contractuelle de s’informer sur la consistance de l’actif patrimonial de la société qu’elle a eu pour projet d’acquérir, ne peut faire grief à M. P… de l’avoir trompée » — the buyer, who had a pre-contractual duty to inform herself about the company’s assets, could not blame the seller for deceiving her (Cass. 3e civ., 23 Sept. 2020, no. 19-17.353). A buyer who fails to do even basic diligence cannot later claim she was deceived.

The distinction is practical. A foreign buyer who buys a house with a beautiful fresh paint job and later discovers the walls are saturated with moisture has a strong claim. A buyer who never asks to see the procès-verbaux (minutes) of the latest co-ownership general meetings and later complains about planned major works has a weaker one. The law expects the buyer to take reasonable steps to inform themselves. But it does not require the buyer to be clairvoyant.

The sanction for proven dol is the nullity of the contract — the sale is unwound, the purchase price returned, and the parties restored to their pre-contractual positions — plus damages. The buyer may also seek a price reduction instead of annulment, which is often the more pragmatic remedy: keep the property but recover the difference between what you paid and what it was actually worth.

A further tactical point: the limitation period for a dol claim is five years from the discovery of the fraud (Article 2224 of the Civil Code), which is significantly longer than the two-year window for vices cachés. This makes dol the fallback for buyers who discover the problem late.

Conclusion

For a foreign buyer, the French legal framework for seller disclosure is, on balance, protective. It imposes a general duty to inform that cannot be contracted out. It lists mandatory diagnostics whose absence strips the seller of their usual defences. It provides two distinct paths to compensation — hidden defects and fraudulent misrepresentation — that can be pursued together. And it extends the limitation period for fraud to five years from discovery, giving a buyer who has been genuinely deceived a realistic window to act.

The framework is not, however, a substitute for due diligence. The Cour de cassation has repeatedly reminded buyers that they bear their own duty to inform themselves, and a buyer who signs a compromis without reading the attached diagnostic file, without visiting the property with a qualified surveyor, and without asking for the co-ownership records will find that duty cited against them in litigation.

Three practical steps, all of which a foreign buyer can take before the notarised deed is signed: obtain a private building survey from a qualified expert en bâtiment, which is not the same as the DDT and will typically be more detailed; demand the minutes of the last three annual general meetings of the co-ownership, if the property is a flat in a copropriété; and — perhaps most important for a non-French speaker — instruct an independent bilingual lawyer to review the entire sale file before you commit. The notary, however competent, acts for both parties and for the French State. Only a lawyer retained by you acts exclusively in your interest.

Our firm regularly advises foreign buyers on French property transactions. For a confidential discussion of your situation, you are welcome to contact our real estate law team in Paris.