Are you undertaking construction or renovation work in France, whether for your main residence or a rental investment? Whether you are an individual maître d'ouvrage (property owner/client) or a construction professional, one term comes up systematically: garantie décennale (decennial warranty). This system, which is a true pillar of French construction law, protects property owners against serious defects and damages for a period of ten years. Understanding how it works, its obligations, and its mechanics is essential to secure your real estate projects and avoid catastrophic financial disputes.
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The assurance responsabilité civile décennale (decennial professional liability insurance) is a legal obligation imposed on builders. It guarantees the repair of damages that occur after the formal acceptance of the works, without waiting for a court decision to rule on liability.
The principle of decennial liability is firmly anchored in the French Code civil (Civil Code). Article 1792 of the Civil Code states that:
> “Any builder of a work is liable as of right, to the owner or purchaser of the work, for damages, even resulting from a defect in the soil, which compromise the solidity of the work or which, affecting it in one of its constituent elements or one of its equipment elements, render it unfit for its intended purpose.”
This text establishes a public policy presumption of liability. This means that the owner does not have to prove the builder's fault; they only need to observe the damage for the liability of the craftsman or company to be engaged.
The insurance obligation itself is governed by *Article L. 241-1 of the Code des assurances (Insurance Code)*. This requires any natural or legal person whose decennial liability may be engaged to be covered by decennial liability insurance at the start of any construction site.
The legal definition of a builder is very broad. According to Article 1792-1 of the Civil Code, the following are subject to this obligation:
Please note: Subcontractors are not directly subject to the decennial insurance obligation towards the maître d'ouvrage, as they have no direct contractual relationship with them. However, they remain liable to the main contractor and must be insured for their contractual civil liability.
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The decennial warranty does not cover all defects in a building. For it to be activated, the damage must meet strict severity criteria defined by law.
These are major defects that threaten the very structure of the building.
This concept is essential. A building is "unfit for its intended purpose" (impropre à sa destination) when it can no longer be used in accordance with the use for which it was intended (housing, commerce, etc.).
The warranty extends to equipment elements whose removal, dismantling, or replacement cannot be carried out without damaging or removing part of the structure that serves as its support.
The decennial warranty does not cover:
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To navigate French construction law smoothly, here are the essential figures:
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To understand the importance of combining decennial insurance with Dommages-Ouvrage (DO) insurance, let us analyze a concrete situation.
The Context:
Mr. and Mrs. Martinez have an extension built on their house for an amount of €85,000 by the company "BatiSud". They subscribe, as required by law for the maître d'ouvrage, to a Dommages-Ouvrage insurance policy for an amount of €3,200. The works are formally accepted on October 15, 2021.
The Damage:
In December 2023, just over two years after acceptance, massive water infiltrations appear on the ceiling of the extension during heavy rains. The water damages the plasterboard ceiling, the insulation, and makes the room completely damp and unusable (unfitness for its intended purpose). The estimated cost of repairs amounts to €14,500.
The Resolution:
1. Thanks to their Dommages-Ouvrage insurance, the Martinez family declares the claim to their own insurer.
2. The DO insurer appoints an expert within 30 days to assess the damage.
3. The expert confirms that the damage falls under the decennial warranty (defect in the waterproofing of the flat roof).
4. The DO insurer pays the sum of €14,500 to the Martinez family within 90 days of the declaration, allowing them to carry out the repair work immediately.
5. In a second step, the DO insurer turns against "BatiSud's" decennial insurer to recover the funds. The Martinez family did not have to suffer any delay related to a dispute between insurers or a possible bankruptcy of the craftsman.
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1. Subscribe Before the Project: You must search for and subscribe to a decennial insurance contract adapted to your specific activity (APE code, nature of the works) before signing your first quote or starting any project.
2. Verify the Geographical Zone: Ensure that your contract covers the geographical area where your construction sites are located.
3. Provide the Certificate: Before the start of the works, you must provide your client (the maître d'ouvrage) with a valid attestation d'assurance décennale (decennial insurance certificate).
4. Mention the Information on Quotes: You must include details of the insurance subscribed, the contact details of the insurer and the guarantor, as well as the geographical coverage of the contract on your quotes and invoices.
1. Demand the Decennial Certificate: Before signing a craftsman's quote, ask for their decennial insurance certificate. Check that the validity date covers the start of the works and that the activity mentioned corresponds exactly to the works entrusted (e.g., an electrician cannot do masonry under their electrician's decennial policy).
2. Verify Authenticity: Do not hesitate to contact the insurer mentioned on the certificate to confirm that the contract is active and that premiums are up to date.
3. *Subscribe to a Dommages-Ouvrage (DO) Insurance*: As the owner, you must subscribe to a DO insurance policy before the start of the project. It allows for rapid pre-financing of repair work without waiting for a court to determine liability.
4. Proceed with a Rigorous Acceptance: At the end of the works, sign a procès-verbal de réception (acceptance report) with or without reservations. This legal act triggers the start of the 10-year period.
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Yes, absolutely. The legal status of the company (micro-entreprise, SASU, SARL, EI) has no influence on the legal obligation. As soon as an auto-entrepreneur (self-employed worker) carries out construction, renovation, or fitting-out work affecting the structural shell or technical secondary works, they must subscribe to decennial insurance.
This is one of the great advantages of the decennial warranty: the guarantee is attached to the building and not to the existence of the company. If the craftsman goes bankrupt or ceases their activity, their decennial insurer remains legally bound to cover claims that occur during the 10-year period. You will then need to declare the claim directly to the insurer mentioned on the certificate provided at the start of the project.
Generally, no. Painting, laying flexible floor coverings, or wallpapering are considered purely aesthetic finishing works. They do not compromise the solidity of the building and do not render it unfit for its intended purpose. Therefore, they do not fall under the decennial warranty, unless these works are inseparable from a waterproofing treatment service, for example.
Yes. Any builder, regardless of their nationality or the country of establishment of their registered office, must be covered by a decennial insurance policy in accordance with French law as soon as they carry out work on French territory. The certificate must be presented in French and expressly mention the application of French law.
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Legal information for guidance only, not personalised legal advice. For your specific situation, ask your question free of charge on AvocatAI — answers based on French law, in your language.