Median €/m² for apartments and houses in 50 major French cities, computed from sales actually signed at the notary (DVF open data) — not asking prices.
From DVF (Demandes de valeurs foncières), the French tax authority's open dataset of every property sale recorded at the notary (excluding Alsace-Moselle, whose local land registry does not feed DVF — which is why Strasbourg, Metz or Mulhouse are not listed here). For each city we sample the cadastral sections around the centre, aggregate three years of sales and publish the median with the P25–P75 range and the number of transactions.
These pages give you a city-level order of magnitude. To price an offer you need the €/m² of the property's exact cadastral section — that is what PropHound computes on every listing in your sourcing inbox, anywhere in France.