Hidden defects after buying a boat in France: rights
Hidden defect found on a boat bought in France: article 1641 of the Civil Code, the two-year limit, the burden of proof, clauses and remedies.
The short answer
- Legal basis: article 1641 of the French Civil Code makes every seller liable for hidden defects that make the boat unfit for its intended use, or that would have led the buyer to pay less or not to buy at all.
- Time limit: article 1648 gives two years from the discovery of the defect, not from the sale; four Cour de cassation rulings in mixed chamber on 21 July 2023 placed that window inside a twenty-year longstop running from the sale.
- Burden of proof: the buyer must show that the defect was hidden, that it is serious enough, and that it already existed, at least in embryonic form, on the day of the sale.
- Exclusion clauses: article 1643 allows a seller to stipulate that no guarantee is owed, but the clause shelters only a seller who did not know of the defect; a professional seller is treated by settled case law as having known.
- Two remedies: article 1644 lets the buyer choose between returning the boat against repayment of the price and keeping it against repayment of part of the price; damages follow under article 1645 or 1646.
- Consumer sales: a consumer buying from a professional also has the Consumer Code guarantee of conformity, where article L. 217-7 presumes, for second-hand goods, that a defect appearing within twelve months of delivery existed at delivery.
You completed the purchase, the boat was delivered, and then something surfaced. Blisters below the waterline. A gearbox that fails on the first long passage. A detached bulkhead, delamination under the deck, corrosion inside a saildrive leg. The seller stops replying, or answers that the boat was old and that you signed a contract taking it as it stood.
French law has a dedicated answer, and it is broader than most buyers expect. The guarantee against hidden defects, the garantie des vices caches, is owed by every seller of a second-hand boat, private individual or business, whether or not the contract mentions it. It does not require fault and is not displaced by the age of the vessel. What it does require is proof, and a clock starts running the day you understand what you are looking at.
This article sets out the mechanism for an English-speaking buyer with no reason to know French civil law: what counts as a hidden defect, how the two-year period runs, why the status of the seller decides the value of an exclusion clause, what a survey can and cannot prove, and the two possible outcomes. It is general information rather than advice on a particular file; for the wider framework, see our page on French yacht and pleasure boat law.
What French law treats as a hidden defect
Article 1641 covers hidden defects which make the thing sold unfit for its intended use, or which so impair that use that the buyer would not have acquired it, or would have paid less, had he known of them. Four conditions follow from that text and the articles around it, and a claim fails if any one is missing.
The defect must be hidden, not apparent
Article 1642 excludes apparent defects of which the buyer was able to satisfy himself. The test is what an ordinary inspection of that type of boat would reveal. Rust weeping from a chainplate on deck is apparent; osmotic blistering that appears only after weeks of drying out generally is not, and nor is delamination behind a moulded liner. Courts are less indulgent towards a buyer who is himself a professional of the same field.
The defect must be serious enough
Not every fault qualifies. The defect must make the boat unfit for its purpose, or reduce its usability enough that the price would have been different. Normal wear, consumables at the end of their life and items a buyer should expect to renew on a boat of that age do not qualify. A hull that cannot safely be navigated is on the other side of the line.
The defect must pre-date the sale
The defect must have existed on the day of the sale, at least in embryonic form, and this is often the decisive condition. Osmosis develops over years, so the question is whether blistering seen months after delivery can have appeared entirely after the transfer. Hard use, a grounding, poor winterisation or an unfortunate repair all give the seller an argument that the damage is the buyer's own.
The defect must be unknown to the buyer
A buyer who knew of the defect and bought anyway cannot complain of it. This is where the seller deploys the pre-purchase survey, the email in which you mentioned that the engine sounded rough, and any condition schedule annexed to the contract.
The two-year period of article 1648
Article 1648 requires the action to be brought within two years of the discovery of the defect. The starting point is discovery, not the sale or the delivery, so a boat bought in 2023 whose structural defect is genuinely revealed in 2026 can still support a claim. Discovery means certain knowledge of the defect, of its nature and of its extent, often the date of the report identifying it rather than the day the first symptom appeared, though courts will not let a buyer postpone that date by declining to investigate. Since the rulings of 21 July 2023, article 1648 read with article 2232 places that window inside an outer limit of twenty years from the sale.
What suspends or interrupts the clock
The period follows the ordinary rules on suspension and interruption. A court order appointing an expert before any trial on the merits, obtained under article 145 of the Code of Civil Procedure, suspends it until the report is filed; issuing proceedings interrupts it. A letter of formal notice does not by itself interrupt a limitation period in French law, although it fixes your position and puts the seller on notice.
Why the first weeks matter more than the last month
Two years sounds comfortable and rarely is, because the useful evidence degrades quickly. A boat that is repaired, relaunched, sold on or moved abroad loses the very condition a technical assessment needs to examine.
What we see in practice
We regularly see the same sequence in the first weeks. The buyer discovers the problem, worries about losing the season, and instructs a yard to put the boat right at once. By the time we are consulted the hull has been peeled and refaired, the engine has been replaced and scrapped, and the only trace of the defect is a handful of phone photographs and an invoice. We also see long exchanges by message in which the buyer explains the problem in ever greater detail while the seller answers with reassurance and delay, and no formal notice is ever sent. Each of these shifts the discussion away from what the seller sold and towards what the buyer did afterwards, which is the ground the seller wants.
Private seller or professional seller
The guarantee is owed by both. What changes is the effect of the exclusion clause and the amount recoverable.
The exclusion clause and article 1643
Article 1643 makes the seller liable for hidden defects even if he did not know of them, unless in that case he has stipulated that he will owe no guarantee. The article therefore authorises the clause only for a seller who did not know, so a seller who knew and said nothing cannot rely on it. The standard sentence in French private boat sale contracts, to the effect that the vessel is sold in its current state without guarantee of apparent or hidden defects, is genuinely useful to a private seller, but it is not the end of the discussion.
The professional seller and the presumption of knowledge
Where the seller is a professional, a yard, a dealer or a charter operator selling its own fleet, settled case law treats him as knowing the defects of what he sells, without allowing him to prove his own ignorance. The exclusion clause is therefore disregarded, and article 1645 becomes available, entitling the buyer to damages beyond the price. A seller who genuinely did not know owes, under article 1646, only the price and the costs occasioned by the sale. A narrow exception is admitted where a professional sells to a buyer who is a professional of the same field.
The consumer route
A consumer who bought from a professional also has the guarantee of conformity of articles L. 217-3 and following of the Consumer Code. Its remedies begin with repair or replacement before price reduction or rescission, and article L. 217-7 presumes that defects appearing within twenty-four months of delivery existed at delivery, reduced to twelve months for second-hand goods. Within that window the burden of proving that the defect is recent lies on the seller. The two regimes coexist and the buyer chooses. A broker who acted as intermediary is not the seller and owes no guarantee under article 1641, but a professional intermediary does owe duties of information and advice, on which he may answer separately.
Evidence: the survey is the case
Here the technical evidence does not support the legal argument, it constitutes it. No judge decides from photographs whether osmosis pre-dated a sale.
The pre-purchase survey cuts both ways
If you commissioned a survey before buying, its content will be read line by line. A report that flagged elevated moisture readings and advised further investigation is a serious obstacle, because it tends to make the defect known. A report that examined the area and found nothing supports the hidden character of the defect, and may raise a separate question about the surveyor's own performance of his engagement.
Unilateral report or court-appointed expert
A report obtained on your own instructions, without the seller being invited, carries limited weight: French courts accept it as an element of evidence but will not decide on it alone if the other side was never able to discuss it. The cures are to have the assessment conducted with the seller present and able to comment, or to apply under article 145 of the Code of Civil Procedure for an expert to be appointed before any trial. That route produces a report drawn up in adversarial conditions and suspends the two-year period while it runs.
What we see in practice
We are often shown a report produced in a hurry, commissioned by the buyer alone, on a boat already partly dismantled, concluding in three pages that the defect is old and serious. It is better than nothing and much weaker than buyers assume. The seller's answer is almost always some combination of four points: the boat was sold as seen and the contract excludes the guarantee; the buyer had it surveyed and cannot now complain; the problem is normal wear on a vessel of that age; and the damage was aggravated after delivery. An assessment carried out with the seller invited, or by a court-appointed expert, meets those points as they are made, in front of someone whose findings the court will follow. That difference in evidential weight is usually worth more than any amount of argument, though nothing here guarantees an outcome.
The two outcomes under article 1644
Article 1644 gives the buyer a choice, and it belongs to the buyer, not the seller: either return the boat and be repaid the price, the action redhibitoire, or keep the boat and recover part of the price, the action estimatoire. Under this regime French law does not give the buyer a right to demand that the seller carry out repairs.
Rescission of the sale
Rescission unwinds the transaction: the boat goes back, the price comes back. It suits severe structural or safety defects, and raises practical questions worth weighing beforehand, including where the vessel is lying, who has been paying berthing and insurance, and what allowance the seller will demand for the use the buyer has had.
Reduction of the price
Price reduction keeps the boat with the buyer and returns a portion of the price, quantified by reference to what the defect represents. This is the more frequent outcome. The amount is assessed on the evidence and is not automatically the cost of the repairs, although repair quotations are usually where the discussion starts.
Damages in addition
Where the seller knew of the defect, article 1645 adds liability for all damages suffered by the buyer, which may extend to lay-up costs, loss of use and transport. Where he did not know, article 1646 limits him to the price and the costs occasioned by the sale.
Other bases, and cross-border points
The hidden defect guarantee is not the only route. Where the boat delivered is not the boat sold, because listed equipment is missing or the vessel lacks agreed characteristics, the issue is non-conforming delivery under the general law of sale, with its own five-year limitation. Where the seller actively concealed a known problem, the contract may be attacked for fraudulent misrepresentation under articles 1130 and 1137 of the Civil Code, including by deliberate silence, within five years of the discovery of the fraud. Article 1112-1 imposes a general pre-contractual duty to disclose information of decisive importance.
Buyers resident outside France often ask whether French law applies at all. Where the contract designates French law, or where the boat was in France and the sale concluded there with a French seller, French law will usually govern, subject to the European conflict of laws rules and to any consumer protection attaching to the buyer's own residence. Settle these questions at the outset: they determine which limitation period actually applies to you.
Frequently asked questions
How long do I have to bring a hidden defect claim in France?
Two years from the discovery of the defect, under article 1648 of the Civil Code. Discovery means the point at which you had certain knowledge of the defect, its nature and its extent, often the date of the report identifying it rather than the day of the first symptom. Since the mixed chamber rulings of 21 July 2023, that window must also fall within twenty years of the sale.
Does osmosis count as a hidden defect?
It can, but not automatically. The questions are whether the blistering was detectable on an ordinary inspection, whether its extent makes the boat unfit for use or materially reduces its value, and whether the process had already begun on the day of the sale. Limited superficial blistering on an older hull may be treated as normal ageing; widespread structural saturation is another matter.
My contract says the boat was sold as seen with no guarantee. Is that the end of it?
No, although it is a real obstacle where the seller is a private individual. Article 1643 permits the clause only for a seller who did not know of the defect, so a seller who knew and said nothing is not protected by it. Where the seller is a professional, case law treats him as having known and the clause is set aside.
I had a pre-purchase survey done. Does that destroy my claim?
Not necessarily, and it may help. If the survey examined the area and found nothing, that supports the hidden character of the defect. If it flagged the issue or advised further investigation that you did not pursue, the seller will argue the defect was known. A survey that missed something it should have found may raise a separate question about the surveyor's liability.
Should I repair the boat before making a claim?
Repairing before the condition has been recorded is one of the most damaging things a buyer can do, because it removes the evidence on which the claim rests. Where a repair is genuinely urgent for safety or preservation, the state of the vessel should be documented in detail beforehand, removed parts kept, and the seller informed in writing before the work starts.
Does it matter whether I bought from a private owner or from a yard?
Considerably. Against a professional seller the exclusion clause is disregarded and damages beyond the price are available under article 1645. Against a private seller in good faith the clause may hold and recovery is limited by article 1646 to the price and the costs occasioned by the sale. A consumer buying from a professional also has the Consumer Code guarantee of conformity.
Can I bring a claim if I live abroad or the boat has left France?
Often yes. The answer turns on the law applicable to the contract, any jurisdiction clause, and the European rules on jurisdiction and conflict of laws. The location of the vessel affects the practical conduct of a technical assessment and the enforcement of any decision, so these points are best resolved at the outset.
Conclusion
French law gives the buyer of a defective boat a genuinely useful remedy, owed by every seller, available whether or not the contract mentions it, and running for two years from the day the defect is actually discovered. It also imposes a demanding burden of proof, and that burden is met or lost in the weeks following discovery, in the yard, long before anything is filed. The buyer who preserves the state of the vessel, assembles the contractual file, establishes the status of the seller and secures a technical assessment the other side can be made to engage with stands in a very different position from the buyer who repairs first and asks questions later.
About the author
Guillaume Leclerc is an avocat admitted to the Paris Bar, practising through SELARL Victoris, 34 Avenue des Champs-Elysees, Paris. His practice covers yacht and pleasure boat transactions, financing, tax and disputes. He works in French and in English and handles files remotely by video conference for clients based in France, Switzerland and abroad. Further information is available on our page on French yacht and pleasure boat law, and enquiries can be sent through our contact page.
Last reviewed: September 2026.
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