Following a spring marked by a slight slowdown in sales, the French property market enters the summer of 2026 under unprecedented heat. Between repeated heatwaves and the European Central Bank's increase in key interest rates, buyers and sellers are asking the same questions: are property search criteria really changing because of the climate, and should you rethink your strategy for the months ahead?
In this article, we review property prices, mortgage rates and transaction volumes in August 2026, as well as the real impact of this summer's heatwaves on buyer behaviour. Whether you're browsing the latest property listings or planning to sell your home with the help of an online property valuation, here are the key trends to watch as the market heads into autumn.
Summary
- Property prices remain broadly stable (around €3,000/m² on average for existing homes nationwide), although significant differences persist between major cities and fast-growing mid-sized towns.
- Mortgage rates remain steady at around 3.30% to 3.40% over 20 years as of July 2026, despite the ECB raising its key interest rates in June.
- Real estate professionals have revised their forecasts downward, expecting 900,000 to 920,000 transactions across France in 2026.
- The heatwaves of summer 2026 are increasing demand for reversible air conditioning and well-oriented homes, without triggering a large-scale migration.
- Home insurance premiums are rising sharply (+10% to +15%), partly due to drought conditions and clay soil shrink-swell risks.
Existing property prices in France this summer
In 2026, the French property market is characterised more by stability than by significant price increases or declines. The average price for existing homes stands at around €3,000 per square metre, remaining almost unchanged year-on-year according to the latest notarial data.
French notaries anticipate modest growth over the course of the year, with prices expected to rise by around 1.4% for existing apartments and 0.5% for existing houses.
However, this national average hides substantial regional differences.
- Paris continues to record a high median price of around €10,700/m², showing a slight increase over one year.
- Several major cities, including Lyon and Bordeaux, have experienced cumulative price declines of 6% to 9% over the past three years.
- Meanwhile, many mid-sized towns continue to perform strongly, with the number of preliminary sales agreements increasing by as much as 17% to 20% in some locations, reflecting a shift in demand away from expensive metropolitan markets.
Mortgage rates remain stable during July and August 2026
Average mortgage rates for 20-year loans remain around 3.30% to 3.40% in July 2026, according to leading French mortgage brokers, while borrowers with the strongest financial profiles can still secure rates of approximately 3.00% to 3.10%. No significant movement has been observed between June and July.
This apparent stability follows an important development: on 11 June 2026, the European Central Bank implemented its first increase in key interest rates in three years (+25 basis points), driven by eurozone inflation returning to around 3.2% amid geopolitical tensions affecting energy prices.
French lenders have not yet passed this increase on to borrowers, although the situation remains one to watch in the coming months.
Fewer transactions expected in 2026
After a strong start to the year—with 958,000 transactions recorded over a rolling 12-month period in February 2026, representing an annual increase of 11% to 12%—the market slowed considerably during the spring.
Between March and April, approximately 17,000 fewer sales were completed compared with the same period in 2025.
Industry organisations now forecast between 900,000 and 920,000 property transactions for the whole of 2026, representing a decline of around 5% compared with 2025.
Property professionals describe the market as moving "in fits and starts", remaining highly sensitive to economic and geopolitical developments while the balance between supply and demand remains fragile.
Is the summer 2026 heatwave really changing the market?
Summer 2026 has been marked by unusually early heatwaves beginning in May, an exceptionally hot June described as historic by Météo-France, and record levels of soil drought during July.
Météo-France estimates a 70% probability that temperatures between July and September will remain above seasonal averages, with another significant heatwave risk identified for the first half of August.
This changing climate is beginning to influence buyers' priorities, although it has not fundamentally transformed the market.
- The number of property listings mentioning reversible air conditioning increased by more than 90% between 2020 and 2025, confirming that cooling systems have become a genuine selling point.
- France's revised Energy Performance Certificate (DPE) calculation method, introduced on 1 January 2026, has improved the energy ratings of several million homes. However, summer comfort is still assessed separately and does not directly influence the property's overall energy rating, meaning that some highly rated homes may remain uncomfortable during periods of extreme heat.
- According to a study published in 2026, there is no evidence of mass migration, but there is a growing "climate reflex": around one-third of French residents say they would consider moving if heatwaves continue to intensify, with strong interest in the Atlantic coast, mountain regions, and northern France.
- Home insurance premiums are expected to increase by 10% to 15% during 2026, mainly because prolonged droughts and clay shrink-swell are becoming one of the country's leading property risks, affecting millions of homes.
Key takeaways for autumn 2026
The French property market approaches autumn in a cautious equilibrium. Prices remain broadly stable but vary significantly between regions, mortgage rates have remained unchanged despite higher ECB interest rates, and climate considerations are becoming increasingly important without fundamentally altering market dynamics.
Properties offering good orientation, reversible air conditioning, and strong energy performance ratings are likely to continue standing out in the months ahead.
Contact your local Optimhome real estate advisor
Every local property market responds differently to national trends. To refine your buying or selling strategy this autumn, contact your local Optimhome real estate advisor. Their knowledge of the local market can help you determine the best time to move forward with your property project.
FAQ
Will property prices fall because of the heatwaves?
Answer: At present, there is no evidence of a direct link between heatwaves and a general decline in property prices. However, homes with poor orientation or without air conditioning may become less attractive over the medium term.
Is August 2026 a good time to buy property?
Answer: Mortgage rates remain stable, and many mid-sized towns continue to offer attractive opportunities. The right time to buy ultimately depends on your personal circumstances and local market conditions, which an Optimhome advisor can help you assess.
Has air conditioning become an important buying criterion?
Answer: Yes. Demand for homes equipped with air conditioning has increased significantly since 2020 and has accelerated following the recent heatwaves, particularly in southern France and densely populated urban areas.
Why are home insurance premiums increasing so much in 2026?
Answer: The main reason is the growing frequency of droughts and the resulting clay shrink-swell phenomenon, which can weaken the foundations of millions of homes across France.
Author :
Fabrice DOBROWOLSKI - Optimhome Network Development Director
Optimhome offers you personalized support for your real estate project. Benefit from all my advice, based on several years of experience, to ensure the success of your project.
