Château-Thierry Property Prices, Rents & Rental Yields

About Château-Thierry

Château-Thierry sits on the Marne in the Aisne department, with a compact historic core, river views and a location that links Champagne country to the broader Paris basin. For apartment investors, that setting gives the city a clear local identity and a practical role within northern France.

In September 2026, the key signal is still price momentum, but with rental growth lagging behind. The average sale price for apartments reached €151,000, while the average price per m2 stood at €2,380, both up 2.1% month on month. Over twelve months, that pace has been stronger: the average sale price is up 15.3% and the average m2 price is up 14.6%.

The tension is that rents have not kept up. The average rent is €560, up 2.4% from the previous month, yet it is still down 6.4% year on year. That leaves the reported yield at 5.13%, a useful reminder that higher entry prices are now being met by softer annual rent levels. For investors focused on apartments, Château-Thierry is therefore a market where capital values have been moving ahead faster than income, making careful underwriting more important than simple price trend following.