Residential energy audit in Wallonia: is it compulsory for grants and loans?

In Wallonia, the audit Logement (residential energy audit) is voluntary, unlike the PEB certificate, which is compulsory when you sell or let a home. The audit does become essential as soon as you want regional support. Until 30 September 2026 it is the necessary step for the primes Habitation grants. From 1 October 2026, an audit before the works is compulsory for the new Rénopack and Rénoprêt loans.

That makes 2026 a turning point. The old grant system is closing, a loan-only scheme replaces it, and the conditions change for single, standalone works. Here is what applies before and after that date, and what it means if you plan to sell.

What is an audit Logement?

The audit Logement is carried out by an auditor approved by the Walloon Region. During a visit to the home, the auditor looks at the walls and other parts of the building envelope, the heating, the hot water system, the ventilation, stability defects and damp, among other things. Plans to convert unheated spaces, such as an attic, can also be taken into account.

The report groups the recommended works into packages, in a costed scenario covering the initial investment, grants and support, payback time and energy savings. Each report comes with an explanatory brochure.

The audit does not replace the PEB certificate, the Walloon energy performance certificate. The certificate is compulsory for a sale or a let and shows the overall performance level, without detailed recommendations. The audit sets out works in order of priority. For a single-family house (a type 1 audit), the auditor hands you your PEB certificate at the same time, valid for 10 years.

There are four types of audit, depending on the home and its heating installation:

• Type 1: a house or flat with its own heating installation (building envelope and systems).
• Type 2: a flat in a building with a shared boiler room (envelope only).
• Type 3: a block of flats where each flat has its own heating (envelope only).
• Type 4: a block of flats with shared heating (envelope and systems).

How much does an audit Logement cost?

There is no official price. According to energie.wallonie.be, the cost varies widely with the type of home, the type of audit and the amount of work the auditor has to do. To get a fair price, contact an approved auditor and describe your home so they can draw up a quote. Asking for more than one quote lets you compare.

Until 30 September 2026: the primes Habitation

Under the current scheme, only audits carried out by approved auditors as part of the audit Logement give access to the primes Habitation. That scheme is ending. According to SPW Logement, every grant application (audit and/or works), including the final invoice, must be submitted by 30 September 2026 at 23:59 at the latest. This applies to the primes Habitation 2025-2026, the audit grant and the older schemes that were kept in place.

• The audit grant is claimed within 8 months of your auditor's final fee invoice, but in any case no later than 30 September 2026.
• Your works must be finished and invoiced before you apply.
• The "Chauffage et Eau chaude pour tous" heating and hot water grant can no longer be claimed since 31 August 2026.

If your file is not complete in time, the amounts from the old scheme are no longer available. The Guichets de l'énergie Wallonie and the Infos-Conseils Logement offices can help you complete your application.

From 1 October 2026: Rénopack and Rénoprêt

The reform of renovation support comes into force on 1 October 2026. The Walloon Government approved its terms on 16 July 2026 (press release from minister Neven). There are no more grants per item of work: support takes the form of a loan and is calculated on all eligible works in the project. The main points:

• A label jump is required: a home with PEB label G or F must reach at least label D (at most 340 kWh/m² per year), and a home with label E at least label C (at most 255 kWh/m² per year).
• An audit beforehand is compulsory: to access the loans, the audit must be done before the works. Its cost counts as an eligible investment.
• Rénopack: a zero-interest loan with a reduction in the amount to repay, for households in income categories C1, C2 and C3. In C1, the Rénopack energy assessment can count as the audit.
• Rénoprêt: a loan with a rate that depends on the income category, for category C4, landlords and associations of co-owners.

In practice, replacing just a boiler no longer earns a separate grant. That kind of work can only be financed within a project that achieves the required label jump, after an audit. A home that already has label D or better is not among the cases covered.

According to the same press release, the amount you can borrow rises to €75,000 for a single-family house (up from €60,000). For the private parts of a flat, financing can reach €60,000 per dwelling, with household income of at most €122,800. For common parts, associations of co-owners can get a zero-interest Rénoprêt of up to €60,000 per dwelling, capped at €600,000 (fewer than 20 units) or €750,000 (20 units or more), based on an audit specific to the building.

Category	Household taxable income	Rate	Reduction in amount to repay
C1	up to €28,900	0%	50%
C2	€28,900.01 to €41,100	0%	40%
C3	€41,100.01 to €67,100	0%	15%
C4	€67,100.01 to €122,800	variable	0%

These amounts are indexed to 1 January 2026, with €5,000 deducted from income per dependant, and the reductions include a 5% top-up for using eco-materials. They come from the press release of 16 July 2026, so check the final terms on logement.wallonie.be before you sign a quote.

What about Flanders or Brussels?

The rules are regional. In Flanders, the official Mijn VerbouwPremie pages do not list an audit as a condition, but since 1 March 2026 owner-occupiers in income categories 1 and 2 only get a grant for a heat pump or a heat-pump water heater (applications until 31 December 2027). Categories 3 and 4 keep the grants for other works; the amounts are in the Mijn VerbouwPremie 2026 simulator. The Mijn VerbouwLening loan runs from €4,000 to €60,000, and for applications since 1 January 2026 the rate is 0% (category 4), 0.5% (category 3) or 1.5% (category 2). The Mijn EPC-labelpremie has been abolished and only still runs for files activated with Fluvius by 31 December 2024. In Brussels, no Renolution grants are open for new works and no decision has been taken on new support. Our overview of renovation grants in Belgium compares the three regions.

The audit, the PEB certificate and selling your home

If you sell, it is the PEB certificate that is compulsory, not the audit. It must exist before the property goes on the market and be handed to the buyer before the sale agreement is signed. Since 1 September 2026, the new certificate model includes a renovation roadmap towards label A and, for houses, an indicative cost of the recommended works. Certificates drawn up before that date remain valid until they expire. There is more detail in our article on how long the certificate is valid when you sell.

For a home with label G, F or E, a buyer who wants to renovate with regional support will need an audit and will have to aim for the label jump. Wallonia does not currently impose a renovation obligation on buyers; the draft renovation plan adopted in December 2025 is indicative and not yet written into law. Our article on going from an EPC G to an EPC C in Wallonia covers the works to plan for.

Before deciding whether to renovate or sell as it is, it helps to know the realistic market value of your home. You can request a free valuation and set that figure against the cost of the works.

Finding an approved auditor

The list of approved audit Logement auditors is published on energie.wallonie.be. For the primes Habitation, only audits by approved auditors in this framework were accepted. Ask for a quote with a description of your home, and check with the auditor which type of audit fits your situation.