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In Belgium, energy renovation is now at the heart of regional policies. To better regulate the work and guide homeowners towards effective improvements, the housing audit becomes an essential step in many cases. In 2025, legislation will evolve: new audiences will be affected, the conditions for granting subsidies will change, and requirements will be strengthened. Should you carry out a housing audit? Is it mandatory in your case? How can you prepare effectively? Here’s everything you need to know, with the support of Avenir Rénovations.
The housing audit is a comprehensive assessment of the condition of a residential building. Conducted by a certified auditor, it aims to:
The audit particularly focuses on insulation (roof, walls, floors), exterior joinery, heating and ventilation systems, and the overall energy performance of the building.
In the three Regions of the country, access to the main financial aids for renovation is now subject to the prior completion of a housing audit.
The audit is mandatory to benefit from the Housing Grant, except for a few small works (e.g., replacement of insulating glazing). It serves as the starting point for the renovation process regulated by the Region.
Even though the audit is not systematically imposed, it is strongly recommended to structure a comprehensive project and benefit from the most advantageous Renolution grants.
The energy renovation score (REN-score) introduced in 2025 requires a thorough technical analysis, often equated with an audit, to access increases in the Mijn VerbouwPremie grant.
Regional authorities want to accelerate the improvement of the PEB certificate (Energy Performance of Buildings). The housing audit provides a clear roadmap to achieve a more favorable PEB class within the given deadlines, especially in cases of:
In 2025, the audit becomes mandatory or recommended in the following cases:
Owner's situation
Housing audit obligation?
| Request for grants in Wallonia | Yes, mandatory |
| Purchase of a property with poor energy performance certificate (Flanders) | Yes, within 5 years |
| Rental of a low-performing housing unit | Recommended or even required |
| Comprehensive renovation project (all regions) | Strongly recommended |
| Occasional work without public aid | Not mandatory |
Good to know: In Wallonia, the audit remains valid for 7 years. It can be used to phase the work and apply for several successive grants.
The audit takes place in several stages:
Conducting an audit is not just a formality: it is an effective planning tool. It allows you to:
In this sense, the audit becomes a technical and financial assurance for Belgian homeowners wishing to renovate methodically.
At Avenir Rénovations, we know that the renovation journey can seem complex. That’s why we offer comprehensive and tailored support:
We adapt our support to the specific requirements of each region.
By 2025, the housing audit will be a key step for smart renovation, accessing public aid, and ensuring effective renovation in the long term. Whether you want to improve the comfort of your home, reduce your bills, or enhance your property, it is a strategic tool not to be overlooked.
With Avenir Rénovations, you benefit from personalized support, a network of certified experts, and complete management of your project, from the audit to the completed site.
Want to clarify and structure your renovation right now?
Request your personalized quote, and let your Project Manager guide you through all the steps, including the housing audit.