You bought the stone house in the Dordogne, or the flat in Paris that needed everything redone, and you hired a French builder. Now the scaffolding has been up for five months longer than promised, the final bill is forty per cent above the estimate, the bathroom leaks into the kitchen, and your emails in English go unanswered while the builder answers French clients the same day. If that sounds familiar, this guide is for you. It explains, in plain English and with the exact French legal texts, how to lock the price and the deadline before work starts, what to do when the builder demands more money or stops showing up, why the single most important day of the whole project is the formal acceptance of the works, and how the famous ten-year guarantee can still force a repair or a refund years later.
Every French term below is explained the first time it appears. The people in this story have fixed legal names in France: you are the maître de l’ouvrage (the client who commissions the works), the builder is the entrepreneur, the written estimate is the devis, the formal acceptance is the réception, and the ten-year structural liability is the garantie décennale. Knowing these five words changes every conversation you will have from now on, because they are the words the builder’s insurer and the judge use.
The core message is reassuring. French construction law is one of the most protective of homeowners in Europe, and it protects you exactly the same way whether you hold a British passport or a French one. A signed estimate binds the builder. A late builder owes you compensation. Defects noted at acceptance must be fixed within a year. Structural defects are covered for ten years even if the builder has retired or gone bust, provided the insurance chain was set up. And every step can be enforced in court, including asking a judge to let you hire someone else to finish the job at the defaulting builder’s expense. What follows is the full method, in the order a dispute actually unfolds.
I. Before and during the works: locking the price, the deadline and the proof
A. Your signed devis is your shield: what French law forces onto the paper before you pay a euro
Never let a builder start on a handshake, however friendly he seems and however good his reviews are. In France the devis, the detailed written estimate, is not a vague indication. The moment you both sign it, it becomes the contract, and Article 1103 of the Civil Code says: “Les contrats légalement formés tiennent lieu de loi à ceux qui les ont faits.” Signed contracts act as the law between the parties. That single sentence is your answer to “prices have gone up, madame” and to “we never agreed a date”.
Before you are even bound, French consumer law is on your side. Article L111-1 of the Consumer Code provides: “Avant que le consommateur ne soit lié par un contrat à titre onéreux, le professionnel communique au consommateur, de manière lisible et compréhensible, les informations suivantes : 1° Les caractéristiques essentielles du bien ou du service, ainsi que celles du service numérique ou du contenu numérique, compte tenu de leur nature et du support de communication utilisé” Before you commit to a paid contract, the professional must give you, readably and understandably, the essential characteristics of the service. For building works that means the precise description of each task, the materials with brands and references, quantities, unit prices, labour, the total including VAT (TVA), the start date, the duration or finish date, payment stages, and the guarantees. A one-line “rénovation salle de bain: 18 000 euros” is not a devis. Refuse it and ask for the itemised version. If the builder will not produce one, walk away, because the vagueness is deliberate and every later dispute will turn on the missing detail.
The works contract itself is a contrat de louage d’ouvrage, the hire-of-work contract defined by Article 1787 of the Civil Code: “Lorsqu’on charge quelqu’un de faire un ouvrage, on peut convenir qu’il fournira seulement son travail ou son industrie, ou bien qu’il fournira aussi la matière.” You can agree that the builder supplies only labour, or labour plus materials. This matters enormously for British renovators who import a kitchen from the United Kingdom or buy tiles themselves. Write into the devis exactly who supplies what, because if your supplied materials are defective the builder will blame them, and if his materials are defective he cannot blame you. Photograph every delivery, keep every invoice, and keep a dated diary of who was on site each day. French judges love paper, and the client who kept a diary beats the client who remembers.
Three clauses deserve your full attention before signing. First, the price clause: is it forfaitaire (a fixed lump sum) or estimated? A fixed price cannot move without your written agreement. Second, the deadline clause: demand a precise finish date and a late penalty (pénalités de retard), for example fifty euros per calendar day of delay. Article 1231-5 of the Civil Code governs these agreed penalties: “Lorsque le contrat stipule que celui qui manquera de l’exécuter paiera une certaine somme à titre de dommages et intérêts, il ne peut être alloué à l’autre partie une somme plus forte ni moindre. Néanmoins, le juge peut, même d’office, modérer ou augmenter la pénalité ainsi convenue si elle est manifestement excessive ou dérisoire.” The agreed sum binds, though the judge can adjust it if it is plainly excessive or derisory, so keep the daily figure realistic. Third, the payment schedule: French practice is roughly thirty per cent deposit (acompte), staged payments as work advances, and the balance (solde) only at acceptance. Never pay the full price upfront, and never pay the balance before the formal acceptance described in Part II. The client who has already paid everything has surrendered the only leverage that counts.
Finally, before the first hammer falls, ask for two documents and keep copies. The builder’s ten-year liability insurance certificate (attestation d’assurance décennale), valid for the year the site opens, with the insurer’s name and the policy number. And your own assurance dommages-ouvrage, the no-fault repair insurance described in Part II, which Article L242-1 of the Insurance Code obliges the client to take out “avant l’ouverture du chantier”, before the site opens: “Toute personne physique ou morale qui, agissant en qualité de propriétaire de l’ouvrage, de vendeur ou de mandataire du propriétaire de l’ouvrage, fait réaliser des travaux de construction, doit souscrire avant l’ouverture du chantier, pour son compte ou pour celui des propriétaires successifs, une assurance garantissant, en dehors de toute recherche des responsabilités, le paiement de la totalité des travaux de réparation des dommages de la nature de ceux dont sont responsables les constructeurs au sens de l’article 1792-1 , les fabricants et importateurs ou le contrôleur technique sur le fondement de l’article 1792 du code civil.” Many British buyers have never heard of this insurance and discover its absence only when suing becomes slow. Take it out through a French insurer or broker before works begin. It pays for the repairs first and argues about blame later, which is exactly what you need when water is coming through the ceiling.
B. He is late, he wants more money or he has vanished: delay damages, extras you never ordered and the letter that unblocks everything
Three scenarios cover ninety per cent of British homeowners’ disputes, and each has a precise legal answer. First, the delay. The finish date passed two months ago, the kitchen fitter blames the plasterer, the plasterer blames the tile supplier, and you are paying rent on a holiday let while your own house is uninhabitable. If your contract contains a late penalty, you simply deduct or claim it. If it does not, Article 1231-1 of the Civil Code still provides: “Le débiteur est condamné, s’il y a lieu, au paiement de dommages et intérêts soit à raison de l’inexécution de l’obligation, soit à raison du retard dans l’exécution, s’il ne justifie pas que l’exécution a été empêchée par la force majeure.” The debtor owes damages for late performance unless he proves force majeure, an unforeseeable and irresistible event. A supplier’s delay, a busy order book or rain in October is not force majeure. Your recoverable loss is concrete and must be proved with receipts: extra rent, storage costs, the higher price of the replacement builder, wasted trips from the United Kingdom with Eurotunnel bookings and hotel bills. Keep every receipt from the day the delay starts, because a judge compensates documented loss, not annoyance.
Second, the demand for more money. Halfway through, the builder announces that the soil needs deeper foundations, the beams are rotten, or the price of copper has risen, and he wants five or eight thousand euros extra before continuing. These are travaux supplémentaires, additional works. The rule is strict and simple: nothing is owed for work you did not order in writing. A fixed-price contract cannot be reopened by one side, and additional works require your prior written agreement, ideally a signed avenant (contract amendment) with its own price and deadline, before the work is done. If the builder carries out extra work without your written order and then bills you, contest the invoice in writing immediately, by registered letter, stating that you never ordered the work. Genuine surprises do exist in old stone houses, and a fair client agrees genuine extras in a signed amendment on the spot, but the amendment must exist before the concrete is poured, not after. When the builder genuinely encounters an unforeseen necessity that threatens the structure, he must warn you and obtain your agreement rather than present a fait accompli. The practical reflex is therefore always the same: no signature, no extra work, no payment.
Third, the builder who stops coming. The site is silent for three weeks, the phone goes to voicemail, and the neighbour says he has started another job in the next village. Do not wait and do not hire a replacement in a panic the next day, because replacing him wrongly can make you the party in breach. The tool that unblocks everything is the mise en demeure, the formal notice sent by registered letter with proof of receipt (lettre recommandée avec accusé de réception), ordering him to resume within a stated deadline, typically eight to fifteen days, and warning of the consequences. The mise en demeure is not optional politeness. It is the legal trigger for late penalties and for every judicial remedy, and the courts treat its date as the starting point of the compensable delay. Write it in French, keep a copy, and state precisely what is unfinished by reference to the signed devis, with photographs attached. A model sentence: you order him to complete the items listed, within fifteen days of receipt, failing which you will seek judicial authorisation to have the works finished at his expense.
That authorisation is the weapon most British clients do not know they have. Article 1222 of the Civil Code states: “Après mise en demeure, le créancier peut aussi, dans un délai et à un coût raisonnables, faire exécuter lui-même l’obligation ou, sur autorisation préalable du juge, détruire ce qui a été fait en violation de celle-ci. Il peut demander au débiteur le remboursement des sommes engagées à cette fin.” After formal notice, you can have the obligation performed by a third party at a reasonable cost and send the bill to the defaulting builder, and you can ask the court for an advance of the necessary sums. In urgent cases the juge des référés, the emergency judge, can appoint an independent expert (expertise judiciaire) to record the state of the site before anything is touched, which freezes the evidence. The correct sequence is therefore: registered formal notice, expert recording if the state of the site is disputed, replacement by another professional, then a claim for the extra cost and the delay loss. Clients who skip the formal notice and simply hire someone else often discover that the first builder then sues them for the unpaid balance, and without the dated notice their position is far weaker.
One warning specific to cross-border situations. If you are not yet French tax resident and you manage the project from London, every deadline for contesting still runs under French time, and French registered letters to your French address are deemed received. Give a French postal address where someone collects your mail, or mandate in writing a bilingual friend, a maître d’oeuvre (project supervisor) or your lawyer to receive documents. And never let language embarrassment stop you from sending the formal notice. A short French letter with the devis number, the list of unfinished items and a fifteen-day deadline is worth more than ten polite English emails saying you are disappointed.
II. Defects after the works: reception, guarantees and forcing repair or a refund
A. Reception day decides everything: reserves, tacit reception and the one-year repair duty
The réception is the act by which you declare that you accept the works, with or without comments, and it is the hinge of the entire French system. Article 1792-6 of the Civil Code defines it: “La réception est l’acte par lequel le maître de l’ouvrage déclare accepter l’ouvrage avec ou sans réserves. Elle intervient à la demande de la partie la plus diligente, soit à l’amiable, soit à défaut judiciairement. Elle est, en tout état de cause, prononcée contradictoirement.” Acceptance is declared with or without réserves (recorded complaints), at the request of the more diligent party, amicably or through the court, and always adversarially, meaning both sides present. Three consequences flow from that date: the balance of the price becomes due, the one-year, two-year and ten-year guarantee periods start running, and apparent defects you failed to record are deemed accepted. Builders know this perfectly. That is why some press you to to sign quickly with a promise to come back and fix the details, and why you must never sign a blank or vague acceptance.
Prepare reception like an inspection, not a celebration. Go through the house room by room with the devis in hand, test every tap, every socket, every shutter and every window, run the shower for ten minutes, and write every defect into the written report (procès-verbal de réception), however small: paint splashes, a cracked tile, a door that sticks, a stain on the ceiling that suggests a leak above. Each reserve must be precise and located, with a photograph. Refuse any pre-printed report that states “no reserves” before you have inspected. If the builder refuses to attend, you can have the reception declared through the court, and if defects are serious you can refuse reception entirely while listing the reasons, a step called refus de réception. The defects recorded as reserves trigger the garantie de parfait achèvement, the one-year perfect-completion guarantee, under which, in the words of the same Article 1792-6, the contractor must for one year from reception repair every defect signalled by reserves or by later written notification. If he does not repair within the agreed time after formal notice, the works can be executed at his expense and risk. This is your fastest remedy for the long list of finishing defects, and it costs nothing but a registered letter.
British clients frequently ask whether moving in or paying the balance counts as acceptance. The answer comes from the highest court. In a published decision of 30 January 2019, the Third Civil Chamber of the Court of Cassation, appeal number 18-10.197, held: “l’achèvement de la totalité de l’ouvrage n’est pas une condition de la prise de possession d’un lot et de sa réception et que le paiement de l’intégralité des travaux d’un lot et sa prise de possession par le maître de l’ouvrage valent présomption de réception tacite” (Cass. 3e civ., 30 January 2019, No. 18-10.197, published in the Bulletin). Completion of the whole building is not a precondition for taking possession of one trade’s lot and accepting it, and paying a lot in full plus taking possession creates a presumption of tacit acceptance. The trap is symmetrical, and you must understand both directions. If you move in and pay everything without reserves, the builder will argue you tacitly accepted, and the court will presume he is right. Conversely, if the builder abandons the site and you take possession and call in other trades to finish, that same presumption can start the guarantee periods in your favour and open the ten-year cover. The practical lesson is identical either way. Never pay the balance and take the keys without a written report containing your reserves, and never let the builder claim that cash, keys and silence mean satisfaction.
What if defects appear weeks after reception that you could not see on the day, such as the leak that only the first heavy rain reveals? The one-year guarantee covers defects revealed after reception provided you notify them in writing within the year, so send that notification by registered letter as soon as each defect appears, with dated photographs. What if the builder disputes that the defect exists or claims it comes from your use of the house? That is precisely when a court-appointed expert is worth the cost, because the expert’s report usually settles the case before trial. And what if there was never any formal reception at all, because the builder vanished mid-project? Ask the court to declare reception judicially as of a given date, so the guarantee periods have a starting point and your claims are framed. Reception is paperwork, but it is the paperwork on which everything else depends.
B. The decennale and biennale safety nets: ten-year structural cover, two-year equipment cover and suing for repair or money back
Once reception is secured, two great guarantees protect you, and they apply whether the builder is an artisan from the next village or a national company. The garantie décennale, the ten-year guarantee, is strict liability. Article 1792 of the Civil Code states: “Tout constructeur d’un ouvrage est responsable de plein droit, envers le maître ou l’acquéreur de l’ouvrage, des dommages, même résultant d’un vice du sol, qui compromettent la solidité de l’ouvrage ou qui, l’affectant dans l’un de ses éléments constitutifs ou l’un de ses éléments d’équipement, le rendent impropre à sa destination. Une telle responsabilité n’a point lieu si le constructeur prouve que les dommages proviennent d’une cause étrangère.” Every builder is automatically liable for damage, even from a defect in the soil, that threatens structural solidity or makes the building unfit for its purpose, unless he proves an external cause. No need to prove fault or negligence. Cracked foundations, a collapsing retaining wall, a roof that lets in water so the house cannot be lived in normally, a heating system wholly unsuited to the building: all of these can be ten-year defects if they meet that test.
Who counts as a builder is deliberately wide. Article 1792-1 of the Civil Code provides: “Est réputé constructeur de l’ouvrage : 1° Tout architecte, entrepreneur, technicien ou autre personne liée au maître de l’ouvrage par un contrat de louage d’ouvrage ; 2° Toute personne qui vend, après achèvement, un ouvrage qu’elle a construit ou fait construire ; 3° Toute personne qui, bien qu’agissant en qualité de mandataire du propriétaire de l’ouvrage, accomplit une mission assimilable à celle d’un locateur d’ouvrage.” Architects, contractors, technicians, and anyone who sells a building they constructed or had constructed are all deemed builders. So if you bought your renovated farmhouse from a developer or a marchand de biens (property dealer) who had the works done, that seller carries the ten-year liability alongside the tradesmen, which gives you a second solvent target. The time limit is set by Article 1792-4-1 of the Civil Code: “Toute personne physique ou morale dont la responsabilité peut être engagée en vertu des articles 1792 à 1792-4 du présent code est déchargée des responsabilités et garanties pesant sur elle, en application des articles 1792 à 1792-2, après dix ans à compter de la réception des travaux ou, en application de l’article 1792-3 , à l’expiration du délai visé à cet article.” Ten years from reception, not from the invoice, not from discovery. A defect that appears in year nine is covered. A claim filed in year eleven for a defect discovered in year nine is too late unless proceedings were started in time, so act early and, if negotiation drags, file protectively before the tenth anniversary.
Beside the ten-year cover sits the garantie biennale, the two-year guarantee for equipment. Article 1792-3 of the Civil Code states: “Les autres éléments d’équipement de l’ouvrage font l’objet d’une garantie de bon fonctionnement d’une durée minimale de deux ans à compter de sa réception.” Other equipment elements carry a minimum two-year proper-functioning guarantee from reception. Boilers, shutters, taps, electrical fittings and fitted appliances that break down or malfunction fall here. The distinction matters because a leaking shower tray that rots the floor can be a ten-year defect through unfitness for purpose, while a shower mixer that simply stops working is a two-year equipment defect. Plead both in the alternative in your letters, and let the expert classify. Clients lose cases by pleading only the wrong guarantee, so never put all the weight on one.
The highest court has recently confirmed how powerful the insurance side of this system is. In a published decision of 11 May 2022, the Third Civil Chamber, appeal number 21-15.608, stated: “l’assurance dommages-ouvrage garantit notamment les dommages qui, affectant l’ouvrage dans un de ses éléments constitutifs ou l’un de ses éléments d’équipement, le rendent impropre à sa destination dans le délai d’épreuve de dix ans courant à compter de la réception” (Cass. 3e civ., 11 May 2022, No. 21-15.608, published in the Bulletin). The no-fault insurance covers damage making the building unfit for purpose within the ten-year trial period from reception, even where the health or safety risk had not yet fully materialised. The same decision adds the rule that saves many homeowners who signed a reception report too quickly: “Si en application du deuxième de ces textes, la réception sans réserve couvre les vices apparents, il résulte du premier et du troisième que la garantie dommages-ouvrage s’applique pour les désordres de nature décennale apparus après celle-ci.” Reception without reserves covers apparent defects, but the no-fault cover still applies to ten-year defects appearing afterwards. In that case, foul-smelling ventilation defects dangerous to health counted as making the building unfit for its purpose during the trial period. For you, the message is that a signed reception without reserves does not destroy a genuine structural claim that emerges later.
How do you actually force repair or money back? The ladder has four rungs. First, the registered formal notice to the builder with a deadline, describing each defect by reference to the guarantee invoked. Second, simultaneous notice to the builder’s ten-year insurer, whose details are on the certificate you collected before the works, and to your own dommages-ouvrage insurer, who must fund the repairs without waiting for the blame to be settled. Third, if liability or the technical cause is disputed, an application to the emergency judge for a court-appointed expert, whose report almost always drives a settlement. Fourth, the claim itself before the tribunal judiciaire (the ordinary civil court), seeking repair in kind, a price reduction (réfaction du prix) for defects you choose to live with, damages for consequential loss such as alternative accommodation, and the late penalties. The official DGCCRF guidance on defective works confirms this sequence of guarantees and remedies (DGCCRF, Malfaçon: mettez en oeuvre les garanties). Limitation periods differ by rung, so start rung one the week you discover the problem, and never let a builder’s promise to “come back in spring” carry you past the anniversaries. Every promise should be answered with a polite letter confirming it in writing, which interrupts disputes about who said what.
Conclusion
A building dispute in France is won with paper, dates and registered letters, not with arguments on the scaffolding. Sign a detailed devis with a fixed price, a finish date and a daily late penalty. Agree every extra in a signed amendment before the work is done. Answer every delay and every vanished builder with a formal notice setting a short deadline. Inspect reception room by room and write down every reserve. Notify new defects in writing within the year. And for anything structural, remember that ten years from reception, the builder and his insurer answer for solidity and fitness for purpose without you having to prove fault. British homeowners sometimes feel disadvantaged by language and distance, but the law itself gives you the same powerful tools as any French client. Use them early, use them in writing, and use them in French, and the roofer who ignored your English emails will answer the registered letter.
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If your French builder is late, over budget or the works are defective, get advice before the next deadline passes. Our office offers a telephone consultation within 48 hours with an avocat of the firm. Call +33 6 46 60 58 22 or contact us via our contact page. We assist British homeowners across France from our Paris office.