EPC label and the renovation obligation after buying in Flanders: what applies in 2026
Short answer: If you buy a home in Flanders with EPC label E or F, vlaanderen.be says you must reach at least label D within six years of the date of the authentic deed. The EPC rates energy use per m² (insulation, glazing, heating, hot water). Have an assessor check which works matter most for your dwelling, and prove the result with a new EPC.
Prices in this article are indicative Belgian market ranges, not Alpha Services Benelux's price list. Your fixed price is in the quote.
What does the EPC label actually measure?
The EPC measures how energy-efficient a home is, expressed as calculated primary energy use. According to vlaanderen.be, the certificate contains data on insulation, glazing, heating and the hot-water installation, with recommendations to make the property more efficient.
The label adds up all energy types (electricity, gas, heating oil, ...). It is a calculation by an accredited energy assessor, not a reading of your meters, so an EPC can look harsher or kinder than your real bills.
| Component | What is assessed |
|---|---|
| Building envelope | Roof, wall and floor insulation |
| Glazing | Type of glass and windows |
| Heating and hot water | Type of installation and appliance |
| Ventilation | Ventilation system in place |
| Renewable energy | For example solar panels |
The Flemish government states a residential EPC is valid for ten years. For the exact label thresholds, check the Flemish Energy and Climate Agency, as sources differ slightly.
What renovation obligation applies after buying in Flanders?
New owners of a home with label E or F must carry out a thorough energy renovation to at least label D within six years of purchase. That is what the official vlaanderen.be page says.
- Start date: the date the authentic deed is executed, or the date a right of superficies or leasehold is established. The preliminary sale agreement does not count.
- Who: new owners on a notarised transfer of full ownership (purchase, gift, ...). The label at the moment of transfer is what counts.
- Proof: a new EPC showing the required label.
Note that older pages still say five years. Test Aankoop reports that new owners have six years since the end-2025 easing. Have the Energiehuis or your notary confirm whether the six-year extension also applies to deeds signed before the easing.
According to Test Aankoop, the planned tightening (label C and stricter for later purchases) was dropped at the end of 2025: the target after renovation stays label D. The official vlaanderen.be page still lists the old path, with label A as the 2050 goal; have the Energiehuis confirm this. Label A remains only a long-term goal.
Which works improve your label fastest?
It depends on the home: the fastest work is whichever component currently scores worst. An energy assessor sees that in your EPC recommendations and can calculate the effect of each measure.
Test Aankoop names four factors that influence the label: insulation, ventilation, type of heating and solar panels. According to that source, solar panels work best when the roof is sufficiently insulated and in sound technical condition. A trade source indicates that roof insulation is often one of the bigger levers, but that is indicative only.
| Measure | Why it counts for the EPC | Have assessed beforehand |
|---|---|---|
| Insulate the roof | The roof is often the largest heat loss | Roof condition and existing insulation |
| Insulate walls and floor | Improves the building envelope | Wall type, damp, accessibility |
| Replace glazing | Window and glass quality count | Condition of windows and frames |
| Replace heating | Appliance type influences the score | Appliance age, emitters, envelope first |
| Ventilation | Part of the calculation | Existing system and airtightness |
| Solar panels | Renewable energy improves the label | Roof condition and orientation |
For a boiler replacement, see the boiler and heating page.
What determines how much your works achieve?
It is not the most expensive measure but the order and the combination that decide the outcome. A new heating system under a poorly insulated roof still leaves a weak score.
- Starting point: how far is your home from label D, according to your current EPC and its recommendations?
- Order: insulate before sizing the heating, otherwise you may buy an oversized appliance.
- Coherence: solar panels need a roof in good condition. Test Aankoop also warns against locking yourself in so that later works become harder or impossible.
- Dwelling type: an apartment, a terraced house and a detached house each have different options.
- Permits: with a building permit application for a thorough renovation, separate energy requirements (thorough energy renovation) may apply.
Renovation work is scheduled by appointment, with margin inside your deadline. It is not an emergency job.
Premiums and loans: one short pointer
Premiums change often. Always check the current conditions before you sign a quote.
For Flanders, vlaanderen.be points to Mijn VerbouwPremie, reformed since 1 March 2026, with an online simulator and applications through the Mijn VerbouwLoket. Contractors supply certificates for it. Test Aankoop advises checking premiums and cheap renovation loans before works start, because the order of works can affect your benefit. For Brussels, see Homegrade and your municipality; for Wallonia, energie.wallonie.be. Amounts and conditions are only on those official pages.
How to get your file checked and compare quotes
Start with three documents: your deed (date), your EPC (label and recommendations) and a plan of the home. With those, a contractor or assessor can advise precisely.
- Check your term: note the deed date and the term shown on vlaanderen.be today.
- Ask for advice: the Energiehuis (Flanders) supports your choices according to Test Aankoop; you can also hire an energy assessor.
- Ask for a written quote per job, stating materials, areas and build-up, so quotes are comparable.
- Ask for the expected EPC effect and who arranges the new EPC.
- Check premiums in the official simulator before you sign.
For a broader project, see our renovation work or the renovation calculator for a first budget indication. Alpha Services Benelux, active since 2014, works with its own team and issues a fixed written quote after a site visit, by appointment. Information in this guide is market guidance, not a price list.
Fixed quote after a site visit
Alpha Services Benelux does the work with its own team, active since 2014. VAT BE 0541.320.178.
Request a quoteFrequently asked questions
How long do I have after buying to reach label D?
According to vlaanderen.be, six years from the date of the authentic deed, for homes with label E or F. Older pages still say five years, so have the term for your deed confirmed with the Energiehuis or your notary.
Does the preliminary agreement or the deed count?
The deed. The term starts on the date the authentic deed is executed, or when a right of superficies or leasehold is established. The private preliminary sale agreement is not the starting point.
How do I prove I reached label D?
With a new EPC showing the required label. Test Aankoop confirms that the improvement from E or F to at least D must be demonstrated with a new energy performance certificate.
Which works should I do first?
It varies per home. The EPC contains recommendations; insulation, ventilation, heating and solar panels all influence the label. Let an assessor set the order so that heating and insulation are matched.
Are there premiums for energy-saving works?
Flanders has Mijn VerbouwPremie, reformed since 1 March 2026. Amounts and conditions appear only on vlaanderen.be/mijn-verbouwpremie or in the official simulator; check them before you sign a quote.
Does this also apply in Brussels and Wallonia?
The obligation described here is Flemish. For Brussels see Homegrade; for Wallonia see energie.wallonie.be, where each region’s own rules and guidance are published.
Sources
- Renovation obligation for residential buildings — Vlaanderen.be (Flemish government)
- Energieprestatiecertificaten (EPC's) — Vlaanderen.be (Flemish government)
- Test uw EPC — Vlaanderen.be (Flemish government)
- Renovatieverplichting in België: wat verandert er in Vlaanderen, Wallonië en Brussel — Test Aankoop
- Mijn VerbouwPremie — Vlaanderen.be (Flemish government)
- Wat is een EPC-attest? Betekenis, labels & wetgeving — Energiebewust Ontwerpen