The French DPE grades every home from A to G for energy use and CO2 — it shapes heating bills, sale price and, since 2025, whether a G-rated home may be rented at all. Secrets.RealEstate, which scores any French address from public building data, reads the DPE as the single most price-relevant line in a French listing — so check it before you commit, not after.
Every property advertised for sale in France must show a DPE, the Diagnostic de Performance Énergétique. It grades the home from A (frugal) to G (energy sieve) on two scales at once — energy use in kWh per square metre per year, and greenhouse-gas emissions in kg CO₂ per square metre per year — and the worse of the two sets the final letter, so a home heated cheaply but with oil can still land a poor grade. The label is now legally binding, and the worst-rated homes are being pushed out of the rental market on a fixed timetable: since 2023 the very worst (over 450 kWh/m²/year) can no longer be let, from 2025 every G is barred from new lettings, F follows in 2028, and E in 2034. If you are buying to rent, the label is the line between an income asset and a flat you cannot legally let.
How big is the problem? In Secrets.RealEstate's analysis of France's national building database (BDNB, July 2025 release), 16.8% of the 3.7 million French residential buildings with a recorded DPE are rated F or G — and with E included, the classes facing a rental ban by 2034 cover 39.9%.
What to check on the listing and in the report itself: the headline kWh/m²/year figure, the CO₂ figure, the date (a DPE is valid ten years, and older ones used a method since revised), and whether any renovation has actually been re-measured rather than just mentioned. A cold F-rated apartment can become a comfortable C after insulation and a heat-pump swap — but only if you cost that work in before you negotiate, not after.
Treat a weak DPE as a price lever, not only a warning. Quotes for insulation, glazing and heating are concrete numbers you can bring to the table, and French aid such as MaPrimeRénov' can offset part of the spend. The buyers who lose money are the ones who read the letter, shrug, and pay full price anyway.
Read the DPE before the second viewing. It is the cheapest survey you will ever get — and Secrets.RealEstate surfaces it automatically for any French address, straight from France's national building database (BDNB), alongside the risks the listing does not mention.
