The **Climate and Resilience Law**, enacted as Law No. 2021-1104 of August 22, 2021, introduced new regulations to improve energy efficiency in residential properties across France. The law prohibits rent increases for properties rated F or G on the energy performance diagnostic (DPE) in mainland France since August 24, 2022. In overseas territories, this restriction applies from July 1, 2024, in areas affected by the DPE. The law covers occupied homes intended as the main residence in the private housing stock, whether they are unfurnished or furnished. Starting January 1, 2025, properties rated G will be banned from being rented in mainland France, followed by class F in 2028 and class E starting in 2034. Tourist rental properties must be classified at least D (or E in certain overseas territories) by 2034. The DPE is an official document that assigns a rating (from A to G) and provides information on the energy and climate performance of a property. It is required for future tenants, except in exceptional cases, such as for a rental period of less than 4 months per year, for a single-family house with a floor area under 50 square meters, or for a historic monument. The DPE must be included in a lease contract, and if a property has a rating of F or G, it is considered to have poor energy efficiency, or a "thermal leak." The rent freeze applies to both new and renewed or tacitly renewed leases. If a landlord attempts to raise the rent, they must prove that the property is not rated F or G. They must provide a valid DPE, and diagnostics carried out after July 1, 2021, are the only ones that can be used for this purpose. If a property lacks a DPE or has a blank diagnostic, the landlord cannot prove that the property meets the energy decency standard. Since January 1, 2023, the final energy consumption of a property put up for rent must not exceed 450 kWh per square meter and per year. If this threshold is not met, the property is deemed indecent from the first tacit renewal of the lease after January 1, 2023. Tenants can challenge a rent increase by sending a letter requesting that the current rent level be maintained, citing the **Climate and Resilience Law** and the property’s DPE rating. This letter should be sent by registered mail with proof of receipt. If the landlord refuses the request, tenants can seek help from the departmental conciliation commission (CDC) or, if that fails, take the matter to court. Disputes have a three-year statute of limitations, starting from the first month of the disputed rent. Tenants are advised to continue paying their usual rent, excluding any increase, to avoid risking termination of their lease. If a tenant receives housing assistance, the landlord must provide a compliant DPE. If the property is rated G and the contract was signed, renewed, or tacitly renewed since January 1, 2025, housing assistance payments can be suspended. The organization responsible for the payments would initiate an "aid retention procedure" for 18 months, which may be extended by an additional six months if necessary. If the property still does not meet the decency standard after this period, the assistance payments would be permanently lost for the landlord. Starting January 1, 2027, the method of establishing and calculating the DPE will change, with the conversion factor of final energy to primary energy for electricity reduced to 1.7. The **Housing Relaunch** bill, already passed by the Senate, aims to bring nearly 700,000 properties rated F or G back onto the rental market, provided the landlords commit to renovations. Diagnostics carried out up to December 31, 2026, will remain valid in 2027 and can be updated online starting January 1, 2027, on the website of the DPE-Audit Observatory of the Agency for Ecological Transition (Ademe).