The mandatory energy audit in France currently applies to the sale of single-family houses rated F or G, with an extension to E-rated homes now scheduled for a longer-term horizon and aligned with the rental-ban timetable for energy-inefficient homes. Unlike the DPE, the French energy performance diagnostic, this document details one or more costed renovation scenarios designed to move the property out of the energy-intensive category. For any owner wishing to sell in 2026, understanding this timetable and the content of the audit is essential in order to set a realistic price and avoid unpleasant surprises during negotiation.
Key takeaways
• Since April 2023, the energy audit has been mandatory in France for the sale of single-family houses rated F or G; its extension to E-rated homes has been postponed and will not take effect for several years.
• The audit goes further than the DPE: it proposes prioritised renovation scenarios, with estimated costs and expected energy savings.
• It must be carried out by a certified professional, such as a diagnostician, architect or qualified design office, and costs on average between €500 and €1,000 depending on the property’s surface area and complexity.
• For the seller, the audit must be provided from the first viewing; for the buyer, it is a negotiation lever and a tool for planning the renovation budget.
The timetable for the mandatory energy audit in France in 2026
The regulatory energy audit is part of the continuation of the French Climate and Resilience Law of 2021, which aims to gradually eliminate energy-inefficient homes from the French residential housing stock. Since 1 April 2023, it has been required for any sale of a single-family house in single ownership rated F or G in the DPE. This obligation applies as soon as the property is listed for sale, not only when the preliminary sale agreement is signed.
The extension of this obligation to E-rated homes, initially announced for January 2025, has been postponed as part of successive parliamentary debates on the pace of energy renovation. In autumn 2026, the audit therefore remains limited to F and G ratings for single-family houses, with the timetable for extending it to class E aligned with the rental-ban schedule, meaning a much more distant deadline. Co-owned apartment buildings currently remain outside the scope of this sale-related obligation, even though equivalent schemes exist for collective diagnostics.
For owners in France, caution remains necessary: regulatory thresholds have already been adjusted several times since 2021, and a further tightening of the timetable before the end of the decade cannot be ruled out. Having an audit carried out in advance, even when it is not legally required, can therefore prove to be a strategic choice to secure a future sale.
DPE and energy audit in France: two documents, two different purposes
The energy performance diagnostic, or DPE, and the energy audit are often confused, even though they serve different purposes. The DPE is an assessment document: it assigns an energy label and a climate label to the home, based on its theoretical consumption and greenhouse gas emissions. It is mandatory for any sale or rental in France, regardless of the property’s energy rating.
The energy audit, by contrast, is a forward-looking document. It does not merely measure current performance: it proposes a genuine renovation roadmap, with several possible work scenarios, cost estimates and an estimate of the expected energy-performance gains after the works. It is a decision-support tool for both the seller and the buyer, whereas the DPE remains primarily an information and classification tool.
What does an energy audit actually contain?
A complete energy audit is based on an in-depth analysis of the building and its equipment, going much further than a standard DPE. The professional who prepares it visits the property, examines the insulation, heating system, ventilation and joinery, then formulates concrete and prioritised recommendations.
• A detailed assessment of the building: insulation of walls, roof and low floors, quality of joinery, heating and domestic hot-water systems, and ventilation.
• At least two renovation scenarios: a first scenario designed to achieve a significant performance gain, and a second targeting a high-performing energy rating, generally B or A.
• A cost estimate for the works at each stage, with an order of priority to spread the investment over time.
• An estimate of the expected energy savings after each phase of works, as well as a reminder of the financial grants that can be mobilised, such as MaPrimeRénov’.
This step-by-step approach is particularly useful for an owner who cannot finance a full renovation all at once: the audit helps prioritise the most profitable areas, such as insulation or replacement of an outdated heating system, before considering heavier works.
Who carries out the audit and what is its average cost in France?
The energy audit must be carried out by a certified professional, who in some cases must be distinct from the diagnostician who prepares the DPE. The work may be performed by a property diagnostician with specific energy-audit certification, an architect trained in energy renovation, or a qualified thermal design office. It is recommended to verify this certification before assigning the task, because an audit carried out by a non-authorised professional has no regulatory value.
In terms of budget, the average cost of an energy audit generally ranges from €500 to €1,000 for a single-family house, depending on the surface area, the complexity of the building and the region. This amount is higher than that of a simple DPE, which is justified by the longer analysis time and the level of detail in the recommendations provided. Some local or national grants may partly finance this service, particularly when it is part of a broader renovation approach.
What the audit changes for the seller in France
For the owner selling an F- or G-rated house, the energy audit is not optional: it must be appended to the technical diagnostic file and given to the potential buyer from the first viewing of the property, not only when the preliminary sale agreement is signed. Failure to provide it exposes the seller to legal risks, including possible cancellation of the sale or a price reduction requested by the buyer.
Beyond the legal obligation, the audit can also become a sales argument if the owner has already carried out some of the recommended works, or if it presents the buyer with a credible and costed renovation plan. Before setting a listing price, it is strongly recommended to obtain an online property valuation in order to factor in the real impact of the energy rating on the property’s value, then discuss with a local professional to refine the marketing strategy.
What the audit brings to the buyer in France
For the buyer, the energy audit is a valuable source of information, often more useful than the DPE alone. It makes it possible to anticipate the real amount of works to be planned after purchase, identify priority items and check consistency between the asking price and the home’s actual energy condition.
This tool also becomes a legitimate negotiation lever: a buyer can rely on the cost estimates included in the audit to request a proportionate price reduction, or to negotiate partial coverage of certain works by the seller. Consulting Optimhome property listings makes it possible to compare similar properties in a given area and objectify the possible negotiation margin according to the displayed energy rating.
The link with the progressive rental ban on energy-inefficient homes in France
The mandatory energy audit at the time of sale forms part of a broader movement to remove energy-inefficient homes from the rental market. Since 1 January 2025, G-rated homes have been banned from rental as main residences. This ban is scheduled to extend to F-rated homes in 2028, then to E-rated homes in 2034, according to the timetable set by the French Climate and Resilience Law.
Conclusion
The mandatory energy audit in France currently remains focused on single-family houses rated F and G, but its scope is expected to evolve in the coming years in direct connection with the timetable banning the rental of energy-inefficient homes. For any owner concerned, this document is not merely an administrative formality: it conditions the listing of the property, influences negotiation with the buyer and guides the renovation choices to prioritise.
Anticipating this process, with the support of certified professionals and high-quality real estate guidance, makes it possible to turn a regulatory constraint into a genuine asset for enhancing the property’s value. This is precisely the role of a local adviser: helping each seller integrate these elements into their pricing and marketing strategy.
FAQ
Is the energy audit mandatory for all homes in France in 2026?
No, at present it only concerns the sale of single-family houses in single ownership rated F or G in the DPE. E-rated homes, apartments in co-owned buildings and better-rated properties are not subject to this obligation in 2026.
What is the difference between the DPE and the energy audit in France?
The DPE measures and classifies the home’s current energy performance, while the energy audit proposes costed renovation scenarios to improve that performance. The audit is therefore a more complete document, focused on action and budget planning.
Who must pay for the energy audit: the seller or the buyer?
The seller must commission and pay for the energy audit, in the same way as the other mandatory diagnostics in the sales file. This cost is therefore added to the usual expenses borne by the owner before listing the property for sale.
What does a seller risk if they do not provide the energy audit?
The buyer may invoke the absence of this document to request cancellation of the sale or a price reduction before the court. Its absence can also significantly slow down the transaction, since notaries generally require all diagnostics to be produced before signing.
Is an energy audit valid for several years in France?
Yes, an energy audit is generally valid for five years, unless significant renovation works have been carried out on the home in the meantime. However, it is advisable to have it updated if the property’s situation has changed before it is listed for sale again.
Do you have to carry out the works recommended by the audit before selling?
No, this is not a legal obligation: the audit remains an information and projection document, not a commitment to carry out works. However, completing some of the priority works can significantly improve the sale price and reduce the property’s marketing timeframe.
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.
