Glossary

Maîtrise d'œuvre (MOE), definition and guide for execution architects

Maîtrise d'œuvre (MOE) is the party that designs and/or supervises construction on behalf of the maître d'ouvrage (MOA), the project owner. The MOE turns the owner's brief into a built work: design, contractor tendering, direction of execution, conformity control, and assistance at handover. The maître d'œuvre is distinct from the maître d'ouvrage, who commissions and finances the work.

What the maîtrise d'œuvre does in practice

During execution, the maîtrise d'œuvre runs the site on the owner's behalf. It coordinates trades, checks that built work matches the drawings and standards, validates progress payments, and steers the schedule. The execution architect (architecte d'exécution) and the OPC carry this role day to day on site.

The MOE role peaks at handover. The maître d'œuvre runs the pre-acceptance inspections (OPR), logs every reserve, notifies contractors, tracks the levée des réserves, then assists the owner with the reception PV (procès-verbal de réception). Each observation must be dated, located by trade and zone, and traced to resolution.

Reception is the act that transfers custody of the work and triggers the legal guarantees. From that signature, the maître d'œuvre carries ten years of decennial liability. The quality of its documentary proof determines its ability to defend itself in a dispute.

Legal and regulatory framing of the maîtrise d'œuvre

The split between maîtrise d'œuvre and maîtrise d'ouvrage structures French construction law. The maître d'ouvrage commissions, finances, and receives the work; the maître d'œuvre designs, directs execution, and guarantees technical conformity on the owner's behalf.

The French Civil Code (article 1792 and following), introduced by the 1978 loi Spinetta, places decennial liability on builders, including the maître d'œuvre. For ten years from reception, the maître d'œuvre answers for defects that compromise the structural soundness of the work or make it unfit for its purpose.

Reception, pronounced by the maître d'ouvrage with the assistance of the maître d'œuvre, sets the start date for the legal guarantees: parfait achèvement, bon fonctionnement, and décennale. The reception PV and the reserve list (liste des réserves) are the maître d'œuvre's central pieces of evidence.

How Builddar supports the maîtrise d'œuvre

Builddar is the construction quality operating system, built for the maîtrise d'œuvre managing execution, OPR, and reception, execution architects, OPC, and maîtres d'œuvre on developer-commissioned projects. Every reserve is logged in seconds on site from the mobile app, with trade, zone, photo, and deadline, then traced to its levée des réserves. The reception PV generates itself from the data you already captured.

The dated evidence chain that decennial liability requires is held for ten years. Architects pay €49 to €79 per seat per month; subcontractors are free, and site managers (conducteurs de travaux) are paid seats. Data is hosted in the EU, the mobile app runs on React Native, the interface ships in French, English, and Spanish, and a firm template is configured in about 20 minutes.

Frequently asked questions about maîtrise d'œuvre

Maîtrise d'œuvre (MOE) is the party that designs and/or supervises construction on behalf of the project owner (maître d'ouvrage). It handles design, contractor tendering, direction of execution, conformity control, and assistance at handover. The maître d'œuvre is typically an architect, an engineering office, or an OPC, distinct from the owner who commissions and finances the work.
The maîtrise d'ouvrage (MOA) is the client: it defines the brief, finances the project, and receives the work. The maîtrise d'œuvre (MOE) acts on the owner's behalf: it designs, directs the site, and guarantees technical conformity. In short, the owner decides what is built, and the maître d'œuvre decides how it is built and has it built.
At reception, the maîtrise d'œuvre runs the pre-acceptance inspections (OPR), logs the reserves, notifies contractors, and tracks the levée des réserves. It then assists the owner in drafting and signing the reception PV (procès-verbal de réception). This step transfers custody of the work and triggers the legal guarantees.
Yes. As a builder under the French Civil Code (article 1792 and following, introduced by the loi Spinetta), the maître d'œuvre carries decennial liability. For ten years from reception, it answers for defects that compromise the structural soundness of the work or make it unfit for its purpose. A dated, located evidence chain is essential to defend itself in a dispute.
The maîtrise d'œuvre can log every reserve on site with trade, zone, photo, and deadline, track the levée des réserves, and generate the reception PV from the data already captured. The platform holds the dated evidence chain for ten years, as decennial liability requires. Architects pay €49 to €79 per seat per month; subcontractors are free, and site managers (conducteurs de travaux) are paid seats, with data hosted in the EU.

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