Rosny-sous-Bois Property Prices, Rents & Rental Yields

About Rosny-sous-Bois

Rosny-sous-Bois combines an established suburban setting with direct ties to the wider Paris area, making it a practical reference point for apartment investors looking at Seine-Saint-Denis. Its market is shaped by a balance between everyday residential appeal and price movements that can quickly affect returns.

August 2026 brings the clearest signal in rents: the average apartment rent has moved up 7.3% over the month to €950. That stronger rental reading contrasts with a softer sales side, where the average apartment price slipped 1.0% month on month to €265,000 and the average price per square metre fell 3.1% to €4,210. The result is a market where income has improved in the short term, but entry pricing has also adjusted.

On a longer view, the tension is still visible. The average sale price is up 1.9% year on year, while the average price per square metre has increased 4.2%, suggesting that value has not weakened evenly across the market. At the same time, rents are still 5.0% below last year’s level, which helps explain why the reported yield stands at 5.49%. For investors, August 2026 points to a market where purchase prices have eased recently, yet rental and capital trends are not moving in the same direction.