Over the 12 months to end of June 2026, 1,667 sales were recorded in Boulogne-Billancourt: enough to choose from, never enough for the finest addresses.
The median for apartments has moved -11% since June 2022 and +1% over one year: a market correcting, address by address.
Houses trade at a median of €12,100/m² against €8,300/m² for apartments: land and gardens pay for their scarcity.
A median of €8,300/m² over the 12 months to end of June 2026 across 1,623 flat sales, the largest volume of the inner ring: in Boulogne-Billancourt the market reads like a small city in itself, with sealed-off segments. The Art Déco of the old centre holds the top of the bill, converted lofts trade file by file, and the recent Trapèze lines up new-build prices, service charges and energy ratings included.
The recent past tells of a correction: the median slid from €9,300/m² at end of June 2022 to €8,200/m² at end of June 2025, then climbed back to €8,300/m² over the 12 months to end of June 2026. The trough seems past, without euphoria: correctly priced homes go within weeks, the others sit on the portals for months.
The hunt means comparing the incomparable: charges of a 1930 block and of a 2015 tower, views over the wood and views over the street. Houses, forty-four sales over the 12 months to end of June 2026 at a €11,500/m² median, remain rare objects bought on conviction.