Boulogne-sur-Mer Property Prices, Rents & Rental Yields

About Boulogne-sur-Mer

Boulogne-sur-Mer pairs a historic coastal setting with the everyday functions of a working port city on the Channel. Its sea-facing position, compact urban fabric and long-established local identity make it a distinctive address in Pas-de-Calais for apartment investors.

September 2026 brings the clearest signal: pricing is still moving higher even as the income picture looks more restrained. The average apartment sale price stands at €145,100, after a modest 1.1% month-on-month decline, yet the average price per square metre has climbed to €2,100, up 3.2% over the month and 10.8% over the year. That combination suggests the market’s underlying valuation remains firm despite short-term fluctuations in completed sales.

For investors, the tension is sharper when rents are brought into view. The average apartment rent is €590, up 0.9% month on month but still 5.3% lower than a year ago. Against that backdrop, the gross yield sits at 6.17%, indicating that returns remain present, but they are being shaped by faster-moving capital values than by rental growth. In other words, September is less about a broad recovery in rent and more about a market where price levels continue to strengthen while the rental side has not kept pace. For apartment buyers focused on Boulogne-sur-Mer, that gap is the central story this month.