Overview of the Court Ruling
Under established case law (see notably Cour de cassation, Third Civil Chamber, 11 May 2011, appeal no. 10-11.713), decennial liability can be triggered even without physical damage, provided the building shows a serious contractual non-conformity that renders it unfit for its intended purpose. In this case, a property developer had delivered an office building that failed to comply with the building permit’s ceiling-height requirements (2.20 m instead of 2.50 m). The buyer sued the developer. The Court of Appeal dismissed the claim, ruling that the non-conformity did not affect structural soundness. The Cour de cassation overturned that ruling, holding that the building’s intended use (offices) required a minimum ceiling height to comply with labour regulations, and that this non-conformity rendered the building unfit for its intended purpose.
Technical Analysis
The concept of a post-handover defect is not limited to cracks or collapses. Non-compliance with applicable standards (DTU technical codes, safety regulations, building permits) can constitute a decennial-liability defect if it renders the building unfit for its intended purpose. The expert must:
- Review the contractual documents (technical specifications, plans, building permit);
- Measure any deviations from regulatory requirements (height, floor area, fire resistance, etc.);
- Assess the impact on the building’s use (inability to operate, danger to occupants).
In cases of insufficient ceiling height, the expert can rely on the French Labour Code (Article R. 4213-7), which mandates a minimum height of 2.50 m for workplace premises.
Case Law Application
The Cour de cassation’s case law has confirmed this approach in several rulings: non-compliance with applicable regulations (building permit, safety standards, Labour Code) can trigger decennial liability if it renders the building unfit for its intended use. In this case, the insufficient ceiling height prevented the premises from being used normally as offices under labour regulations, thereby justifying the developer’s decennial liability. The expert must precisely document this deviation and its functional consequences on the building’s use.
Key Takeaways
- For buyers: check the building’s compliance with the contractual documents and building permit before handover, and call in an expert if in doubt.
- For builders: any changes must be approved by the project owner and comply with applicable standards.
- Decennial liability can be triggered by non-conformity, even without any apparent physical damage.
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Frequently Asked Questions
What is a decennial-liability defect?
A defect that compromises the building’s structural soundness or renders it unfit for its intended purpose, and which was concealed at handover.
Can a contractual non-conformity qualify as a decennial defect?
Yes, if it is serious and renders the building unfit for its intended purpose (e.g., insufficient ceiling height, missing regulatory sound insulation).
What is the expert’s role in this type of dispute?
The expert identifies deviations, measures their significance, and assesses their impact on the building’s use. They provide the technical elements needed to characterise the defect.
Can you take action after handover for a visible non-conformity?
If the non-conformity was apparent at handover, it must be noted as a reservation. Otherwise, it is covered by the handover. The expert can help determine whether it was concealed.
📅 Updated on August 5, 2026 — By Cassini Expertise, independent building expert serving Alpes-Maritimes (06) & Var (83). Free quote: 04 22 46 06 04.
Further reading:
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Expert du bâtiment indépendant — Antibes (06·83·13·40)
📅 Mis à jour le 25/09/2026 — Cassini Expertise, expert bâtiment indépendant (06·83·13·40).