Real sales recorded at the notary (French DVF open data) in the cadastral sections around the centre of Rouen — not asking prices, signed prices.
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A city median hides huge street-by-street gaps. PropHound gives you the DVF of the exact cadastral section of every listing you source — free to start.
We start from DVF (Demandes de valeurs foncières), the open dataset published by the French tax authority: every property sale recorded at the notary in France (excluding Alsace-Moselle), with price and surface. For Rouen we geocode the city centre (national address base), identify the cadastral sections over several rings around it (IGN cadastre), then aggregate the apartment and house sales of the most central sections.
We publish the median (not the mean, which outliers distort) over the last three years of sales, after removing aberrant values (< €300/m² or > €40,000/m², surfaces < 9 m²). The P25–P75 range shows where the central half of transactions lands — that is your real negotiation margin.
Most online estimates lean on sellers' asking prices. DVF records signed prices at the notary. The gap between the two is exactly what you leave on the table when you buy at asking price. For an investor or property dealer in Rouen, this is the basis of any serious offer.
Source: DVF — data.gouv.fr (Etalab open licence), BAN geocoding, IGN cadastre parcels. Aggregated by PropHound. Indicative data, not a property appraisal.