In a decree published in the Official Journal on 4 May 2022 anyone who wants to sell a property from September 2022 that is ranked in the F or G categories (i.e. those that are projected to need a minimum 330 KWh/m2 of energy per year) will also need to pay for an ‘audit énergétique’.
This will be a more precise version of the DPE (an energy efficiency scale called the Diagnostic de Performance Énergétique) and aims to inform future buyers not only of the likely energy bills but also of the cost of renovations needed to make the property fall into the B class.
Eventually, the audit will also apply to homes in the E class, as of January 1, 2025, and then later to homes in the D class from January 1, 2034. If your property is seriously energy inefficient (requires more than 450 KWh/m2 per year), you will not be allowed to rent it out from 2023.