Mansard Observatory
Mansard watches the rental market continuously. Each quarter we publish a data edition — rents, rent control, energy sieves, price gaps — broken down by commune and free for the press to reuse.
One angle per quarter. Each edition ships a national figure and the commune-by-commune detail.
Portals publish asking prices. Mansard cross-references observed inventory with public data (DVF, ADEME, rent-control orders) to produce aggregate statistics no one else assembles.
Every edition publishes its sources, sample size and caveats. Figures are aggregate statistics, never individual listings.
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