Certinergie, an officially accredited body recognised by the Walloon Region, issues your EPC certificate (PEB) across all of Wallonia. Our professional certifiers follow a strict data collection protocol to guarantee a certificate that reflects the true value of your property.
The EPC certificate must be available from the moment of advertising and handed over to the buyer or tenant.
Sale exceptions :
The energy class (A++ to G) and the consumption (kWh/m².year) must appear in every advert for sale or rental.
The EPC certificate provides a complete and objective analysis of the energy performance of your home, drawn up under a strict data collection protocol. All certificates use the same indicators for a reliable comparison.
Espec en kWh/(m².year)
Gradual obligation to upgrade existing dwellings
Goal: phase out F and G labels from the Walloon housing stock
The EPC becomes a contractual commitment after purchase
👉 Until 2028 : Nothing changes for buyers. Only existing obligations apply (EPC certificate for sale/rental).
👉 After 2028 : The buyer commits to reaching the required EPC level within 5 years of purchase.
The headline label used to compare buildings on a standardised scale.
Official label – from A++ (excellent) to G (very poor)
New build requirement – minimum class B since 2010
Premium gateway – determines access to regional grants
Expressed in primary energy, calculated under standardised conditions.
kWh/m².year – specific consumption per heated m²
kWh/year total – theoretical annual overall consumption
Conditions – 18°C indoor, climate type, standard occupancy
Analysis of the elements in contact with outdoor air or unheated spaces.
Roof – type and thickness of insulation
Walls – composition and U-value
Glazing – frame type and glazing type
Floor – insulation above cellar or ground
Performance of the installations producing energy and comfort.
Heating – type, overall efficiency, control
DHW – domestic hot water production
Ventilation – system A, B, C or D
Renewables – heat pump, solar, biomass, CHP
The certificate also displays performance indicators for each installation: heating efficiency (mediocre to excellent), hot water efficiency, and completeness level of the ventilation system. These indicators are expressed as a percentage of overall efficiency in primary energy.
Every EPC certificate includes general improvement measures tailored to your building. These recommendations help identify priority works to upgrade the energy class and reduce consumption.
Every zone of the official certificate contains essential information. Discover how to read and interpret this document to better value your property.
The title indicates whether the certificate pertains to an existing or new residential building.
The certificate number and its validity period: all certificates are recorded in the central database managed by the Wallonia Public Service.
Contact information, property type, and an exterior photo of the building.
These five technical indicators provide a detailed assessment of the various components of your home’s energy performance. Each indicator is rated on a qualitative scale that helps you identify strengths and priority areas for improvement.
The contact information for the authorized certifier (existing building) or the EPC officer (new building). Their signature is required and ensures compliance with a specific procedure.
A summary of the rules regarding the requirement to provide an EPC certificate:
The specific annual primary energy consumption per square meter. This is calculated by dividing the total theoretical energy consumption by the heated floor area. This value is represented by an energy rating.
The total theoretical energy consumption of the dwelling, expressed in primary energy under standardized conditions.
Without documentation, the certifier applies penalising default values. For example, wall insulation without evidence is treated as non-existent (U = 2.5 W/m².K), whereas with an invoice or accepted grant application, the actual value can drop to 0.24 W/m².K.
A rigorous 4-step process, in line with the data collection protocol set by the Walloon Region. The on-site visit is mandatory to issue the certificate.
The certifier must visit the property to collect the data.
Supporting documents allow the actual performance to be valued.
Data is entered into the official Walloon Region software.
The official certificate is generated and handed to the owner.
Without evidence, penalising default values are applied. Preparing the certifier’s visit thoroughly is essential.
• Grant applications accepted by Wallonia
• Original equipment invoices
• Technical data sheets for insulation
• Air-tightness tests
The same house renovated in 2005 can produce very different results:
Without evidence
Class E-F
Default values
With evidence
Class B-C
Actual performance
Average visit duration: 45 min to 1h30 depending on property size • Certificate received: within 48h after the visit
The Walloon EPC protocol defines precise rules to determine which spaces belong to the “protected volume” (PV) and how habitable areas must be measured.
The protected volume covers all heated spaces or spaces intended to be heated, bounded by a thermal wall (insulation). The EPC calculation is performed on this volume.
Key criterion: A room is part of the PV if it is heated OR if it sits within the building’s insulation envelope.
Heated floor area
Floor area of the protected volume, measured between interior walls
Useful floor area
Habitable area used to compute specific consumption (kWh/m².year)
The Walloon protocol uses a decision tree to determine whether each room belongs to the protected volume. Here are the key questions the certifier asks:
The Walloon Region has its own regulatory framework for EPC certification. Here are the essentials for existing and new buildings.
The Walloon EPC certificate remains valid for 10 years, with limited exceptions.
Wallonia uses its own software and calculation methodology.
The EPC label must appear in every property advert, on penalty of sanctions.
Several situations require or recommend a new certificate.
Since 1 July 2023
Every address must be registered in ICAR (Centralised Inventory of Addresses and Streets) before the EPC certificate can be issued.
Address not recognised?
• House number missing from the database
• Box number not registered (apartment buildings)
• Subdivision into units not officially recorded
Solution : Contact your local Population or Town Planning office to request the addition of your address. Allow a few days before sync with PACE.
For common areas in co-ownership
In Wallonia, co-ownerships can request a partial report to assess the common areas (roof, façades, collective heating…).
Use of the partial report
• Identify priority works at the General Meeting
• Make access to regional grants easier
• Feed data into individual certificates
Important : A new partial report invalidates the EPC certificates of the units concerned, which must be reissued to incorporate the new data.
A building whose planning permit application was submitted before 1 May 2010. The certificate is issued by an accredited EPC certifier using PACE software, during a mandatory on-site visit.
Any construction whose permit was filed after 1 May 2010. The certificate is issued by the EPB Officer using EPB software, based on site and architect data. Minimum requirement: class B.
Trust the Belgian leader in EPC certification for your property in Wallonia. Our expertise is recognised by real estate professionals and institutions.
Certinergie is an officially accredited body by the Walloon Region for the issuance of compliant EPC certificates.
Our certifier team follows continuous training and fully masters the data collection protocol and Walloon regulations.
Our certificates are rigorous, detailed, and leverage every acceptable piece of evidence to reflect your property’s true energy value.
Access your documents, track your requests, and download your certificates online. Full history of your properties.
Availability across all of Wallonia with flexible time slots. Certificate delivered within 48h after the visit.
Over 50,000 certificates issued across the 3 regions. Expertise recognised by notaries, estate agents and managing agents.
Trusted by professionals
Certinergie is accredited in all three Belgian regions. Each region has its own regulations and methodology, but the energy scales are harmonised for cross-region comparison.
Although procedures differ, the A++ to G scale is shared across the three regions, allowing an objective comparison of energy performance.
Everything you need to know about the EPC certificate in Wallonia, based on the official regulations.
What is the validity period of the EPC certificate in Wallonia?
The Walloon EPC certificate is valid for 10 years from its issue date. It becomes invalid if: (1) a new certificate is issued, (2) works subject to a planning permit are carried out (extension, rebuild, deep renovation), (3) a new partial report is issued for the co-ownership. After significant energy works not requiring a permit, it is recommended to issue a new EPC to capture the improvements.
What evidence should I prepare to optimise my certificate? he certifier must send you the list of acceptable evidence 5 days before the visit.
Without acceptable evidence, the certifier applies often-penalising default values. To optimise your EPC, gather: grant applications accepted by Wallonia (insulation, heating), original invoices showing equipment age, technical data sheets for insulation materials and equipment, compliant air-tightness tests, and CWAPE certificates for solar PV or CHP. The certifier must send you the list of acceptable evidence 5 days before the visit.
What does an EPC certificate cost in Wallonia?
The price depends on the area and property type (apartment, house with 2-3-4 façades). At Certinergie, our rates start from €165 excl. VAT for a standard apartment. The price covers the on-site visit, encoding into the official PACE software, and delivery of the numbered certificate. Surcharges may apply for large buildings or complex situations. See our pricing page for an exact quote.
Is my property subject to the EPC obligation?
Most residential properties are subject to it for sale or rental. Legal exceptions: listed heritage buildings, temporary structures (<2 years), unheated industrial/agricultural buildings, places of worship, dwellings smaller than 18 m² without a private water point. Inheritances and donations do not trigger the obligation, except where advertising occurs. A dwelling must have private access, at least one water point, and more than 18 m² to qualify as an “EPC unit”.
My home is being renovated — can I get an EPC? ed. For an urgent sale/rental, a first EPC can be issued, then a new one after works.
Yes, but we recommend waiting until energy works are complete (insulation, heating, glazing) so that the certificate reflects post-renovation performance. An EPC issued before works will not capture future improvements. If works require a planning permit, the existing EPC becomes invalid anyway and must be reissu
Why does actual consumption differ from the certificate?s normal and intentional: the EPC compares buildings, not behaviours.
The certificate reports theoretical consumption, calculated under standardised conditions (constant 18°C, climate type, fixed occupancy) to enable an objective comparison between dwellings. Actual consumption depends on occupant behaviour (preferred temperature, habits), climate conditions of the year, and number of occupants. This is normal and intentional: the EPC compares buildings, not behaviours.
What is the partial report for co-ownerships?
The partial report describes collective installations (collective heating, DHW) that supply several dwellings. It is an essential supporting document for issuing the EPC certificate of each apartment served by these installations. It is drawn up by an accredited certifier and is also valid for 10 years. The owners’ association must make it freely available to every owner. If a new partial report is issued, individual certificates based on the old one become invalid.
Qu’est-ce que le rapport partiel pour les copropriétés ?
Le rapport partiel décrit les installations collectives (chauffage collectif, ECS) qui alimentent plusieurs logements. C’est un document complémentaire indispensable pour établir le certificat PEB de chaque appartement bénéficiant de ces installations. Il est réalisé par un certificateur agréé et a aussi une validité de 10 ans. L’association de copropriété doit le mettre gratuitement à disposition de tout propriétaire. Si un nouveau rapport partiel est établi, les certificats individuels basés sur l’ancien deviennent invalides.
Order your compliant EPC certificate now and receive it within 48h. Our accredited certifiers cover all of Wallonia.