Understanding PEB Regulations in Wallonia: Requirements, Updates, and Practical Advice

What is the PEB certificate in the Walloon Region?

The Building Energy Performance (PEB) certificate serves as a true energy “ID” for your property. It assesses the estimated primary energy consumption of the dwelling based on standardized criteria: thermal insulation, type of heating, ventilation, and domestic hot water production. This document rates homes on a scale ranging from A+ (highly energy-efficient) to G (very energy-intensive).

In Wallonia, the overall objective is part of the energy transition aimed at decarbonizing the residential housing stock by 2050. Whether you are a homeowner, buyer, or landlord, understanding the PEB regulations is essential for successfully completing all your real estate transactions.

Disclosure Requirements for Sales and Rentals

As soon as a residential property is listed for sale or rent, Walloon law requires the owner to have a valid PEB certificate. This document must be issued by an approved PEB certifier following a thorough on-site inspection.

• Mandatory information in advertisements: All real estate advertisements (posters, websites, social media, or agency windows) must include the certificate’s key metrics. This includes the energy label (from A++ to G), primary energy consumption per square meter per year, and the certificate’s unique number.
• Submission of Documents: In the case of a sale, the original certificate is provided to the buyer upon signing the notarized deed at the notary’s office. For a lease, a certified true copy is attached to the lease agreement at the time of signing.
• Validity Period: The PEB certificate remains valid for 10 years. However, if you carry out work that alters the property’s thermal structure or energy systems, an update is strongly recommended.

Recent Developments and Renovation Projects

Walloon regulations continue to evolve to provide a more precise framework for information. Since the fall of 2026, the certificate format has included enhanced indicators that allow for a clearer visualization of renovation scenarios. It offers a clear roadmap to guide homeowners toward greater energy efficiency.

Unlike other regions, Wallonia does not prohibit the rental of homes with a poor energy rating. Nevertheless, planning for renovations in advance remains a sound strategy. Improving a property’s energy performance increases its value, provides occupants with greater comfort, and prevents a drop in value when the property is resold. To support these efforts, the Region offers structured assistance, notably through the prior completion of a housing audit, which is a prerequisite for accessing various renovation grants.

Renovations and New Construction: The PEB Procedure

For new construction projects or major renovations requiring a building permit, the requirements go beyond a simple posting certificate. An approved PEB officer must be designated as soon as the permit application is filed to prepare an initial PEB declaration. This specialist ensures compliance with insulation and energy efficiency standards throughout the construction period before issuing the final PEB declaration.

Penalties and Risks in Case of Non-Compliance

Failure to provide an EPC certificate when putting a property up for sale or rent exposes the owner to fixed administrative fines. Furthermore, publishing an ad without displaying the energy label and energy consumption rating constitutes a violation. Consulting a professional to arrange for this document in advance ensures a smooth transaction without delays.

Summary for your property in Wallonia:

• Order your PEB certificate before publishing any listing.
• Clearly display the energy efficiency label and energy consumption in all your advertisements.
• Verify that the document has not exceeded its 10-year validity period.
• Plan your insulation and heating upgrades to preserve your property’s market value.