Dommages-Ouvrage Insurance 2026: Obligations and Deadlines in the Alpes-Maritimes and Var

Dommages-Ouvrage Insurance: A Reinforced Legal Obligation in 2026

Since the 1978 Spinetta Law, dommages-ouvrage (DO) insurance has been mandatory for any project owner undertaking new construction, major renovation, or extension work. In 2026, this obligation remains more relevant than ever, with regulatory changes tightening controls and penalties. For property owners and real estate professionals in the Alpes-Maritimes (06) and the Var (83), taking out DO cover is not optional \u2014 it is an essential legal requirement to protect your investment.

Key Changes for 2026

This year, several points deserve close attention:

• Shorter processing deadlines: Insurers now commit to responding within 60 days of a claim being filed, down from 90 previously. Once this deadline passes, the project owner can apply to the summary proceedings judge for an interim payment.
• Heavier penalties: Failure to take out cover now exposes individuals to fines of up to \u20ac75,000, and legal entities to fines of up to \u20ac375,000, without prejudice to any additional damages.
• Stricter checks at handover: Insurers now require a more complete handover file, including minutes of the handover meeting, resolved reservations, and ten-year (decennial) guarantee certificates from the contractors.

Why DO Insurance Is Critical on the French Riviera

In the Alpes-Maritimes and the Var, local climate and geological conditions \u2014 seismic risk, clay soil shrink-swell, and strong wind exposure \u2014 make DO insurance especially strategic. An uncovered claim can lead to exorbitant costs, particularly in areas where land and construction prices are already high. Towns such as Nice, Cannes, Antibes, Grasse, and Toulon are especially exposed, whether in older buildings or recent developments where hidden defects can surface years after handover.

How to Take Out Cover, and What It Includes

DO insurance must be taken out before construction begins. Once the one-year perfect completion guarantee expires, it covers damage falling under the ten-year (decennial) guarantee: defects that compromise the structural soundness of the building or render it unfit for its intended purpose. DO insurance allows for rapid compensation, without waiting for a court ruling on which contractor is liable.

Key Points for Professionals

Real estate professionals \u2014 developers, agents, notaries \u2014 must systematically check for DO cover during any transaction. In 2026, notaries are required to flag the absence of DO insurance to buyers in the deed of sale, which can result in the sale being voided or the price reduced. For co-ownerships, DO insurance is also mandatory for facade renovation or roof replacement work, on pain of the works contract being declared void.

Cassini Expertise: Your Technical Partner

As a building and surveying expert, Cassini Expertise works throughout the Alpes-Maritimes (06) and the Var (83) to:

• Carry out pre-works condition surveys and precise topographic surveys, essential for building a solid DO insurance file.
• Assist project owners at handover, identifying reservations and documenting any defects.
• Assess claims and produce detailed reports to support declarations to insurers.

Our local expertise is a major asset in anticipating risks specific to the PACA region, such as foundation issues linked to clay soils or infiltration caused by intense Mediterranean storms.

Conclusion

In 2026, dommages-ouvrage insurance remains a cornerstone of legal and financial security for any construction project. Whether you’re in Nice, Cannes, Antibes, Grasse, Toulon, or anywhere else in the Alpes-Maritimes or Var, don’t overlook this obligation. Work with experts who know the local terrain. Cassini Expertise supports you at every stage, from site preparation to claims management. Contact us on 04 22 46 06 04 for a personalised quote. We work throughout the 06 and 83 departments.

\ud83d\udcc5 Updated on 14/08/2026 \u2014 By Cassini Expertise, independent building expert for the 06 & 83. Free quote: 04 22 46 06 04.

Frequently Asked Questions

What is dommages-ouvrage insurance?

Dommages-ouvrage insurance is a mandatory policy for any project owner building or renovating a property. It allows for rapid compensation for damage covered by the ten-year (decennial) guarantee, without waiting for a court ruling. It must be taken out before work begins.

What are the deadlines for taking out dommages-ouvrage cover in the 06 and 83?

Cover must be taken out before the site opens, and the declaration of the start of works must be sent to the insurer within 15 days of work beginning. In the event of a claim, the insurer has 60 days to make a compensation offer after the expert assessment.

What can I do if the dommages-ouvrage insurer misses the deadlines?

If the insurer fails to meet the legal deadlines (for example, the 60-day offer period after the assessment), you can send them a formal notice. Once this deadline passes, late penalties may apply, and you can bring the matter before the tribunal judiciaire. It is advisable to keep evidence of every step you take.

📅 Mis à jour le 25/09/2026 — Cassini Expertise, expert bâtiment indépendant (06·83·13·40).