Decennial liability is a civil-law rule that makes builders automatically responsible for serious structural defects in a building for ten years after the owner formally accepts the work. The owner does not have to prove negligence. If a covered defect appears within the ten-year window, the architects, contractors, and other construction professionals who built the project are presumed liable, and they can escape that presumption only by proving the damage came from an outside cause. The rule exists in France, Belgium, much of the Middle East and North Africa, and other jurisdictions that follow the civil-law tradition.
What the Ten-Year Guarantee Covers
The protection is narrower than it sounds. Decennial liability applies only to defects that threaten a building’s structural soundness or make it unfit for its intended use. Foundation settlement that cracks load-bearing walls, roof failures that let water into living spaces, floor slabs buckling under normal loads — these are the classic examples. Article 1792 of the French Civil Code captures the standard: damage that “compromises the solidity of the work” or “renders it unfit for its intended purpose” triggers the builder’s presumed liability. Similar language appears in the civil codes of other countries that follow this model.1France Assureurs. How Decennial Liability Insurance Works
Equipment that is physically inseparable from the structure, such as built-in plumbing risers and embedded electrical conduits, generally falls inside the ten-year guarantee. Detachable equipment like water heaters, radiators, and shutters does not; those items sit under a separate two-year guarantee of proper functioning. Cosmetic problems — peeling paint, minor surface cracks, normal wear — fall outside decennial coverage entirely. The test is functional. Does the defect threaten the building’s integrity or make it unusable? If not, a different warranty regime applies.
Where the Rule Applies
France is the origin and the most developed version. Its decennial regime traces back to the Napoleonic Code and was modernized by the Spinetta Law of 1978, which paired strict builder liability with mandatory insurance. Belgium imposes a ten-year builder liability for defects affecting waterproofing or structural stability. Egypt’s civil code holds architects and contractors strictly liable for building collapse or serious defects for ten years from delivery. Decennial provisions also appear in the civil codes of the UAE, Kuwait, Qatar, Jordan, Lebanon, Libya, and Bahrain. Saudi Arabia is the only Gulf state that pairs strict builder liability with compulsory decennial insurance; the others impose the liability but leave insurance voluntary, which weakens an owner’s practical remedy if the builder becomes insolvent.
Who Can Be Held Liable
Decennial liability casts a wide net. In France, anyone who qualifies as a “builder” under the law is covered: architects, general contractors, technical consultants, property developers selling unfinished buildings, and single-home builders.1France Assureurs. How Decennial Liability Insurance Works Other civil-law countries typically cover at least the contractor and the design professional, though the exact list varies.
The liability is joint and several. If you discover a structural crack, you do not need to work out whether the architect’s design was flawed or the contractor executed badly. Any of the liable parties can be pursued for the full cost of repairs. The professionals then sort responsibility out among themselves, but your claim is not held up by that internal dispute.
When the Clock Starts and How Long You Have
The ten-year clock runs from the formal acceptance of works, not from the end of construction. Acceptance is a specific legal act in which the owner inspects the finished project and signs off, sometimes noting reservations about minor defects still to be fixed. Article 1792-6 of the French Civil Code defines it as “the act by which the client declares acceptance of the work, with or without reservations.” The date on that acceptance document is the starting point for every construction warranty that follows.
From that date, French law layers three protections:
- A one-year guarantee of perfect completion. The contractor must fix every defect noted at acceptance and anything else reported in the first year, including cosmetic and finishing problems.
- A two-year guarantee of proper functioning. This covers detachable equipment such as heating systems, electrical fittings, and plumbing fixtures that malfunction.
- The ten-year decennial liability. This covers structural defects and anything that makes the building unfit for its intended purpose.
The ten-year period is peremptory. Courts enforce it strictly, it does not pause for negotiations, and once it expires the right to claim is gone. That hard deadline is also what makes decennial insurance pricing viable, because insurers know their exposure ends on a fixed date.
What Defenses a Builder Can Raise
Strict does not mean absolute. A builder can escape liability by proving the damage resulted from an “extraneous cause,” meaning something entirely outside the builder’s control. Three defenses are recognized:
- Force majeure. An event that was genuinely unforeseeable, impossible to prevent, and external to the construction. An earthquake in a region with no seismic history might qualify; a flood in a known flood zone probably would not.
- Owner’s fault. If the owner caused or contributed to the damage, for example by making unauthorized structural modifications after delivery, the builder’s liability can be reduced or eliminated.
- Third-party fault. Damage caused by someone unrelated to the construction, such as a neighboring excavation that undermined the foundation.
The burden of proof sits on the builder, and courts apply these defenses strictly. If a force majeure event only partially caused the damage, the builder remains liable for the portion attributable to a construction defect. The extraneous cause must be the sole cause for the defense to fully succeed.1France Assureurs. How Decennial Liability Insurance Works
The Insurance Behind the Liability
France requires two separate policies on every major construction project. Article L241-1 of the French Insurance Code requires every construction professional subject to decennial liability to carry insurance and provide proof of coverage at the start of each project.2Dalloz. France Code des Assurances L241-1 – Assurance de Responsabilite Obligatoire On the owner’s side, Article L242-1 requires a dommage-ouvrage policy. This policy pays repair costs upfront without waiting to determine who was at fault. The insurer pays the owner, then pursues the responsible builder’s insurer to recover what it paid out. The result is that repairs get funded quickly rather than waiting years for liability to resolve. Dommage-ouvrage premiums typically run 0.5% to 5% of the construction cost, depending on project complexity and risk.
Most other countries with decennial liability do not require both policies, or in some cases any policy. Saudi Arabia mandates decennial insurance for builders. The UAE, Kuwait, Qatar, and Bahrain impose the liability without requiring insurance to back it up. In those countries your practical protection depends on whether the builder is still solvent when a claim arises, which is a real risk across a ten-year window.
What Happens When the Property Is Sold
Decennial liability attaches to the building, not to the original owner who commissioned it. When a property changes hands during the ten-year period, the new owner inherits the right to bring claims against the original builders. Courts across multiple jurisdictions have confirmed this. In Italy, the Supreme Court ruled that a decennial liability insurance policy follows the property and transfers automatically to a new owner without the insurer’s consent or any separate assignment.
If you buy a two-year-old apartment, you still have eight years of decennial protection remaining. The acceptance date does not reset; the clock keeps running from the first acceptance. But you step into the same rights the original owner had.
How to File a Claim
If you spot a structural defect inside the ten-year window, move quickly. The French procedure is the clearest template, and most civil-law jurisdictions follow it in broad outline.
Document the Defect
You need the original acceptance document, which establishes the start date of the ten-year period. You also need photographs showing the damage and how it has progressed, and a diagnostic report from an independent structural expert linking the damage to a construction flaw. The report should describe when the defect was first noticed, how it affects the building’s structural integrity or usability, and the estimated cost of repair. Vague expert reports are where most claims stall. Insurers routinely reject claims where the causal link between the defect and the construction is not clearly established.
Send Formal Notice
Send written notice by registered mail with acknowledgment of receipt to both the builder (or lead contractor) and their decennial liability insurer. If you hold a dommage-ouvrage policy, notify that insurer too. The notice should describe the defect, reference the acceptance date, and attach the expert’s report.
Under the French dommage-ouvrage system, the insurer has 60 days to acknowledge the claim and appoint its own expert to inspect the damage. Within 90 days, it must make a formal settlement offer. If you accept, payment follows within 15 days. If you reject the offer but cannot delay repairs, the insurer must advance 75% of the offered amount while the dispute continues. Other jurisdictions have less defined timelines, which makes early legal advice worth seeking.
How This Compares to U.S. Construction Defect Law
If you are coming at this from the United States, be aware that decennial liability does not exist in American construction law. The U.S. framework runs on statutes of limitations, statutes of repose, and implied warranties, none of which provide the same automatic, strict-liability protection.
A statute of repose is the closest American analog to the ten-year cutoff. It sets an absolute deadline for filing construction defect claims, measured from a fixed event such as substantial completion. The similarity mostly ends there. Repose periods vary widely by state, from 4 years in Tennessee to 20 years in Maryland. A statute of repose creates no presumption of builder responsibility. You still carry the burden of proving the builder was negligent or breached a warranty. And the deadline is absolute, so if a latent defect surfaces after the repose period, the claim is barred regardless of when you discovered the problem.
The implied warranty of habitability offers some protection for buyers of new homes. Recognized in most states, it guarantees that a newly built home is fit for habitation and built in a workmanlike manner. It covers latent defects including structural problems, and in many states it extends to later purchasers. But its duration is much shorter than ten years. Some states cap it at one year for general defects, with slightly longer periods, around five years, for foundation issues. You also have to prove breach, which typically means showing the builder failed to meet applicable building codes or industry standards.