What insulation grants are available in Belgium?

Belgium offers various grants, subsidies and financial support schemes for insulation and energy renovation work. The support available depends on the region where the property is located. Flanders, Brussels and Wallonia each have their own rules, eligibility requirements, grant amounts and application procedures. Depending on the property and applicant, support may be available for roof insulation, cavity wall insulation, external wall insulation and other energy renovation measures. Nu-Isoleren provides an overview by region to help homeowners identify which schemes may be relevant.

Yes. Insulation grants differ between the three Belgian regions. Flanders has its own renovation support system, the Brussels-Capital Region has separate financial support and financing schemes, and Wallonia operates its own grant system. Grant amounts are not the only difference: income requirements, technical standards, eligible work and application procedures can also vary. Nu-Isoleren therefore recommends checking the rules for the region in which the property is located before insulation work begins.

Financial support may be available for roof insulation, depending on the region and the applicant's circumstances. Eligibility can depend on factors such as income, the property, the insulation performance and the date of application. In Flanders, roof insulation falls within the roof category of Mijn VerbouwPremie, although eligibility rules changed in 2026. Nu-Isoleren installs roof insulation using solutions including glass wool and PIR insulation boards.

Cavity wall insulation may qualify for financial support in certain situations. The property, applicant and work must meet the requirements of the relevant region. In Flanders, filling a suitable existing cavity wall is included within the external wall category of Mijn VerbouwPremie and must comply with specific technical conditions. Nu-Isoleren insulates suitable cavity walls with EPS beads after checking whether the cavity is technically suitable for insulation.

It may be possible to combine different types of support, but the rules depend on the region, the applicant and the work being carried out. A property may require both roof and wall insulation, for example, with each category subject to separate eligibility conditions. Certain schemes may also be combined with other financial incentives, while some combinations are restricted. Nu-Isoleren recommends checking the applicable rules before starting the renovation work.

Current grant amounts, income thresholds, technical requirements and eligibility conditions are published by the competent authority in each Belgian region. The regional grant pages from Nu-Isoleren provide separate information for Flanders, Brussels and Wallonia and can direct homeowners to the relevant official sources. Because grant schemes can change, the conditions should always be checked before work begins and before submitting an application.