When people look for window grants Flanders offers, they mostly mean Mijn VerbouwPremie, the renovation premium of the Belgian region of Flanders. If you fit the windows yourself, there is no grant: the scheme only accepts work carried out by a contractor (aannemer). Windows bought supply only and fitted by a contractor do not count as DIY according to the scheme's website, so they can qualify. There are more conditions, though, and they changed in 2026. Below we summarise them in general terms, as of November 2026, and show where to check the details.
Window grants Flanders: what is Mijn VerbouwPremie?
Mijn VerbouwPremie is the Flemish premium for renovating houses and flats, including glazing and new external joinery (ramen en deuren). You apply online through the Mijn VerbouwPremie portal once the work is done. The amount and who can get it depend on your income category and the type of applicant. The rules changed in 2026, and not every category is still entitled to the window premium. That is why we give no amounts here: check them on the official website before you decide. Some municipalities also have their own premiums.
Which conditions usually apply?
According to vlaanderen.be (November 2026), the main ones are:
- a contractor carries out the work, and each contractor completes a certificate (attest aannemer),
- invoices are in the applicant's name and address; an invoice for materials may come from abroad if it is in Dutch or French,
- when replacing windows in a house or flat, you must meet the ventilation requirement,
- glass and doors must reach certain insulation values, and the glazing must be in a heated room.
This list is not complete and may change. The scheme's current rules always apply.
What does this mean if you buy windows supply only?
We do not fit windows. So you have two routes:
1. You fit them yourself. You save on labour, but there will be no Mijn VerbouwPremie for the windows. 2. You buy the windows from us and a Flemish contractor fits them. According to the scheme, two invoices then count: ours for the materials and the contractor's for fitting. The contractor completes the certificate.
Before you order, check three things. Is your income category entitled to the window premium in 2026? Will the contractor fit windows they did not supply? What details and which language must the invoice have? For the last point, message us before you order.
The values for each item are in the specification you approve before production, and in the declaration of performance on delivery. We have worked with windows since 1997, completed more than 5000 orders and check sizes, opening sides and descriptions on every quote. You can show these documents to your contractor and adviser. Glass units and the Uw value are explained in our article on the Uw value.
Where to check the current rules
- vlaanderen.be, the Mijn VerbouwPremie page for ramen en deuren (windows and doors),
- the Mijn VerbouwPremie portal, where you submit the application,
- your local energy advice office or municipality, which also knows about local premiums.
This is general information, not legal or tax advice. Once you know the conditions, build your windows in the configurator and see the price straight away. We prepare the quote with delivery to Belgium within 3 working days; delivery terms are on the export page.