Brussels energy grants in 2026: what's changing for boiler replacement

Replacing an old boiler with a condensing model, or switching to a heat pump, represents a significant investment. Brussels Environment offers several grants to help reduce this cost, which can be combined, subject to conditions, with federal support schemes and income-based energy grants.

The main categories of support

Three main options are currently available to Brussels households:

• The Renovation grant for replacing a boiler with high-efficiency equipment
• Increased grants for lower-income households, calculated according to the housing quotient
• Enhanced support for equipment using renewable energy, such as heat pumps

The exact amount depends on the household's composition, the type of dwelling and the equipment installed: it's best to have your project costed precisely before submitting your application, rather than relying on a generic figure found online.

A word of caution: getting the order of steps right

The grant application must generally be submitted before work begins, based on a detailed quote. Starting work too early can simply make the application ineligible - this is one of the most common pitfalls we see among our customers.

We prepare quotes that meet grant application requirements, to help you avoid this kind of unpleasant surprise.