type_local : Property type (House, Apartment, Dependency)

commune : City/town name

code_postal : Postal code

surface_reelle_bati : Real built surface (m²)

surface_terrain : Land area in m² (for houses and plots)

valeur_fonciere : Transaction value (€)

prix_m² : Price per m²: transaction value divided by built area — the key comparison metric

date_mutation : Mutation date: official sale date as recorded by the tax authority

nature_mutation : Nature of transfer: Sale, Off-plan sale (VEFA), Auction, etc.

nombre_pieces_principales : Number of main rooms declared at the time of transfer