Construction law lawyer in Paris: works, warranties and expert assessment.

The liability regime depends on the nature of the defect. For defects and faulty workmanship noted at acceptance or within the following year, the one-year completion warranty of Article 1792-6 of the Civil Code applies. For separable items of equipment, the two-year warranty of good working order (1792-3) applies. For defects that compromise structural soundness or make the work unfit for its purpose, the ten-year liability of Article 1792 of the Civil Code applies.

Identifying the regime is decisive: it determines the limitation period, the nature of the evidence and the insurer to be called in. The firm's practice requires a precise characterisation as soon as the first defects appear, generally supported by an adversarial or court-appointed expert assessment. To go further, see the page on construction defects.

The ten-year liability runs from acceptance of the works. Acceptance is the act by which the project owner declares that it accepts the work, with or without snags noted (our translation). It may be express, by a joint report, or tacit if taking possession and payment show an unequivocal intention to accept the work.

The 3rd civil chamber held on 30 January 2019, No. 18-10.197, FS-P+B+I that completion of the whole of the work is not a condition for taking possession of a lot and for its acceptance and that payment of the full cost of the works on a lot and its taking of possession by the project owner give rise to a presumption of tacit acceptance (our translation). The starting point of the ten-year liability is therefore the date of acceptance, express or tacit. To go further, see the page on acceptance of the works.

An expert assessment is rarely mandatory but often decisive. Where there are technical defects, the legal characterisation depends on an analysis of causes, origin and extent that is for the expert. The amicable expert assessment, organised by the insurers, serves first to fix the insurer's position on cover. The court-appointed expert assessment, ordered in urgent application proceedings under Article 145 of the Code of Civil Procedure, is adversarial, binding on all parties and generally decisive for the proceedings on the merits.

The practical rule: seek a court-appointed expert assessment as soon as an insurer disputes cover, a contractor hides behind a subcontractor, or the project owner has to deal with several participants. To go further, see the page on building expert assessment.

For the project owner, building-damage insurance is mandatory before the site opens (Article L. 242-1 of the Insurance Code). It pre-finances ten-year repairs without waiting for responsibilities to be determined. For builders, ten-year liability insurance is required of every participant in the building process. For the project manager, professional liability insurance is essential.

Checking the participants' insurance certificates determines the financial soundness of the project. A certificate may be required at signature of the contract, before the start of the works and at each annual renewal. The policy must specifically cover the project in progress and the nature of the works. To go further, see the page on building-damage insurance and the page on ten-year liability.

Yes. Abandonment of the works by the contractor exposes it to termination of the contract for its sole fault and to damages for the additional cost of completion. Evidence is built in three stages: formal notice to resume the works within a specified period, a bailiff's report of the abandonment, and an assessment of the financial consequences (completion quotes, loss of enjoyment, late-completion penalties).

Where the default continues, the project owner may, after formal notice, sue for termination and have the works completed by another contractor at the defaulting contractor's cost and risk. This route is burdensome but is justified when the contractor stalls or denies that the breaches occurred. For high-stakes projects, the urgent application for an interim payment may be paired with the urgent application for an expert assessment, so as to move forward in parallel on the merits and on the technical assessment.

The late-completion penalties provided for in the contract are due by operation of law if the contractual deadline is exceeded, unless a clause expressly makes them subject to prior formal notice. They apply without the need to show specific loss. The judge may adjust the amount if the penalty clause appears manifestly excessive or derisory within the meaning of Article 1231-5 of the Civil Code (our translation).

Cumulation with other heads of compensation (loss of enjoyment, rehousing costs, additional credit costs) is possible if the contract does not prohibit it and the loss is distinct. In practice, negotiation focuses first on the formal validity of the notice and on the characterisation of the causes of delay (force majeure, fault of the project owner, changes to the plans). The firm advises contractors and project owners alike on this balance.

The action is brought in solidum against all builders whose liability may be engaged, whether the general contractor, the subcontractor, the project manager or the design office. An in solidum judgment allows the project owner to turn to the party with the financial resources or to the soundest insurer. The apportionment between builders then takes place through claims between them.

The court-appointed expert assessment is generally the necessary step: it determines each party's share of responsibility. Before the trial judge, builders often seek to shift liability onto their subcontractor or to invoke a fault of the project owner. The rigour of the evidence file and the coordination of the writs of summons determine the effectiveness of the action. For Paris projects, the Paris judicial court is generally competent.

Article 1792 of the Civil Code covers damage that compromises the soundness of the work or that, affecting it in one of its constituent or equipment elements, makes it unfit for its purpose. The 3rd civil chamber held on 14 September 2023, No. 22-13.858, FS-B that the health risk to which the occupants of a building are exposed may, by its seriousness, alone make the building unfit for its purpose, even if it has not materialised within the probationary period (our translation).

Case law also addresses progressive defects. The 3rd civil chamber held on 4 November 2010, No. 09-70.235, Bull that a court of appeal cannot apply ten-year liability to progressive defects without finding that they were of a nature to compromise the soundness of the work or to render it unfit for its purpose before the expiry of the ten-year warranty period (our translation). Characterisation depends on the findings of the expert assessment.

Yes, under strict conditions. Tacit acceptance requires an unequivocal intention of the project owner to accept the work. The 3rd civil chamber held on 30 January 2019, No. 18-10.197, FS-P+B+I that payment of the full cost of the works on a lot and its taking of possession by the project owner give rise to a presumption of tacit acceptance (our translation).

The presumption falls away where the project owner disputes the quality of the works. In its judgment of 1 April 2021, No. 20-14.975, FS-P, the 3rd civil chamber confirmed that the court of appeal, having held that the project owners' intention to accept the work, even with snags noted, was equivocal, could deduce from this that there was no tacit acceptance (our translation). The firm's practice: prevent disputes by formalising an acceptance report, even with snags noted, which secures the time limits of the warranties.

No. Acceptance without snags noted amounts to a waiver of the right to rely on apparent defects. If defects or unfinished work are visible, the project owner must record them in the report by noting snags. Snags trigger the one-year completion warranty of Article 1792-6 of the Civil Code for one year from acceptance.

Where major defects prevent use of the work, the project owner may refuse acceptance or ask the court to appoint an expert before any acceptance. The practical rule: prepare a joint inspection, list in advance the points to check, refuse to sign if a defect makes the work unfit for its purpose, and record the snags precisely. To go further, see the page on acceptance of the works.

The cost depends on the complexity of the case, the number of builders involved and the phase. A court-appointed expert assessment generates expert fees (initial deposit generally €3,000 to €8,000, adjusted afterwards according to the work done) and lawyer's fees covering the submissions to the expert. The merits phase adds the cost of the writ of summons, written submissions and the hearing.

A project owner who succeeds may claim an order for costs and for irrecoverable costs under Article 700 of the Code of Civil Procedure. In high-stakes cases, the increase to double the legal rate under Article L. 242-1 of the Insurance Code often absorbs much of the cost of fees. At the start of a case, the firm sets out a fee framework covering the expert assessment and hearing phases.

Ten-year liability applies to works that amount to a work within the meaning of Article 1792 of the Civil Code. Case law has held that major renovation works, including alteration of the structure, laying of floors, conversion of attics or complete re-roofing, may constitute a work and benefit from ten-year liability.

Conversely, routine maintenance, limited repairs and cosmetic finishing work fall outside its scope. Characterisation depends on technical analysis: whether the works are incorporated into the structure, the extent of the materials used, the nature of the intervention. The court-appointed expert assessment is generally decisive on this point. The firm's practice is to characterise the works from the quote stage, to anticipate the applicable regime.

The Paris judicial court is competent for construction disputes concerning a building located in Paris, on the basis of Article 44 of the Code of Civil Procedure (real property matters). For projects in the inner suburbs, the judicial courts of Bobigny (93), Créteil (94), Nanterre (92) or Versailles (78) may be competent depending on the municipality.

The Paris court of appeal hears appeals against judgments of the Paris judicial court and of the other judicial courts within its jurisdiction. The firm, located at 11 rue Margueritte 75017 Paris, regularly pleads before these courts and coordinates court-appointed expert assessments across the whole jurisdiction. Mastery of procedural rules and rigorous monitoring of time limits determine the outcome of the case.

Not necessarily, but the advantage is clear where the stakes are serious. A lawyer helps avoid common mistakes: signing a report without suitable snags noted, notifying a loss by a simple email, waiting too long before characterising a defect legally, accepting a clearly insufficient compensation offer. Each mistake can cost key levers: warranty time limits, presumption of liability, burden of proof.

Early intervention protects time limits and structures the evidence file. The firm drafts formal notice letters, arranges bailiff's reports, initiates court-appointed expert assessments and then pleads on the merits. On high-stakes projects, the investment in fees upfront is generally recovered from the expert assessment onwards.

A solid file rests on four pillars. First, the contract: works contract, quotes, execution drawings, ten-year liability and building-damage insurance certificates. Next, the chronology: service orders, site meeting minutes, acceptance, letters noting snags. Then the technical evidence: dated photos, bailiff's reports, amicable expert reports, repair quotes. Finally, the financial chain: invoices, interim statements of work, proof of payment, retention of payment as a guarantee.

The firm's practice is to assemble this file as if it were to be brought before the judge from the first exchange. Initial rigour avoids later challenges from the insurer or the opposing party and makes it possible to quickly bring an urgent application for an expert assessment under Article 145 of the Code of Civil Procedure.