A legal obligation, not a guideline
Since 1 July 2023, a PEMD diagnostic is required before demolition or significant renovation of buildings above 1,000 m² of cumulated floor area, and of any building that hosted agricultural, industrial or commercial activity involving dangerous substances. The obligation sits in the French building code, with penalties up to 45,000 euros. The diagnostic must be performed by a competent, insured and independent party, before tender documents are sent to contractors.
The data chain: from survey to national database
What makes the French scheme unique is not the obligation, it is the data chain around it:
- The inventory follows a national nomenclature of products, equipment and materials (14 macro-categories, hundreds of typed entries) and a waste nomenclature aligned with EU waste codes;
- Results are filed on a national platform operated by the CSTB (the French scientific and technical centre for building), through standard forms: one before works, listing reusable products and expected waste, one after works, declaring what was actually reused or recycled;
- Downstream, the reuse ecosystem increasingly seeks to build on this data, which makes the quality of the field survey the bottleneck of the whole chain.
Since December 2025: a methodology standard
Three years of practice exposed a weakness: every auditor surveyed and quantified differently, and buyers could not compare offers. The answer is the French standard XP X46-039 (December 2025). It frames the mission contractually (which documents the client must provide, including up-to-date scaled drawings), the survey itself (identify, locate, quantify and characterize every product, equipment and material), and the report structure, down to the page marking and the list of visited and non-visited areas. We compared it with its German and European counterparts here: pre-demolition audit standards compared.
What three years of mandatory practice taught
- Price pressure is real. A compliance-only segment emerged, selling box-ticking audits at very low prices, sometimes without a site visit. The quality segment responded with method, restitution meetings and richer deliverables. The standard now gives buyers a way to tell them apart.
- Unusable data is the most expensive kind. Reuse platforms and contractors report audits without quantification or localization, forcing a second inventory. Paying twice is the hidden cost of cheap audits.
- Quantification is the hard part. Counting doors is easy. Producing tonnages per waste stream with traceable calculation methods, across a whole building, is where audits succeed or fail. This is fundamentally a measurement problem, and it is why plan-based capture tools matter: see the software approach.
Why this matters for the EU debate
When the European Commission designs the future harmonized audit, it will not start from a blank page. France brings the only full-scale, in-production reference: an obligation with thresholds, a national nomenclature, a data platform with before and after declarations, and a methodology standard. Whatever the Circular Economy Act proposes in 2026, professionals who already master this system will be years ahead. The full regulation watch is here: the EU pre-demolition audit.