Boulogne-Billancourt Property Prices, Rents & Rental Yields

About Boulogne-Billancourt

Boulogne-Billancourt lies immediately west of Paris, beside the Seine and near the Bois de Boulogne. Its riverside position and proximity to the capital give this Hauts-de-Seine city a distinctive setting for an investment location page.

In October 2026, the clearest signal for apartments is the divergence between sale and rental prices. The average sale price is down 5.6% year over year, while the average rent is up 1.9% over the same period. The contrast matters more than either movement alone: purchase prices and rents have not followed the same annual direction, so a single headline about prices would miss part of the investment picture.

At an average sale price of €590,000, the amount committed to a purchase remains central to the calculation. The reported yield is 4.79%, providing a reference point for considering rental income alongside purchase price. It is not a promise of returns on an individual apartment. Acquisition costs, ongoing expenses and the rent achievable for a particular property can all affect the outcome.

The practical reading is measured rather than one-sided. Lower annual sale prices may change the entry calculation, but the separate rise in average rent does not establish what will happen next. Investors considering Boulogne-Billancourt should test each apartment against its own purchase price and plausible rent, rather than treat citywide averages as a forecast for a specific listing.