Energy renovation has become a major issue in Belgium. With rising energy prices, European climate goals, and the desire to improve housing comfort, more and more homeowners are considering undertaking work to enhance the energy performance of their homes.
Insulation, replacement of the heating system, installation of new windows, or improvement of ventilation: these works help reduce energy consumption while increasing the value of the property.
To support this transition, the Belgian regions offer various energy renovation grants aimed at assisting homeowners. In 2026, several changes will strengthen these programs to encourage the most energy-efficient works.
These financial aids can cover a significant portion of the cost of the works. In some cases, they can reach up to 35% to 70% of the project amount depending on household income and the nature of the project.
They therefore represent an interesting opportunity for individuals looking to modernize their homes while limiting their investment.
However, the aid programs vary by region (Wallonia, Brussels, Flanders), and the administrative procedures can sometimes seem complex. That is why many homeowners choose to be assisted by a specialized company.
A general construction company like Avenir Rénovations can help you define priority works, plan your project, and optimize access to the various available grants.
Why energy renovation is becoming a priority in Belgium
The Belgian real estate stock still includes many homes built before the introduction of modern energy standards. These homes often have insufficient insulation and outdated heating systems.
This situation leads to several consequences. Homes consume more energy to maintain a comfortable temperature, resulting in higher energy bills. Thermal comfort can also be limited, with rooms that are difficult to heat in winter or too hot in summer.
In this context, improving the energy performance of homes becomes essential. Energy renovation not only reduces energy consumption but also increases the value of the property and improves occupant comfort.
Public authorities are therefore strongly encouraging these works to accelerate the energy transition of the Belgian real estate stock.
What are the new energy renovation grants in Belgium in 2026?
The aid programs are regularly evolving to support works that have the most impact on the energy consumption of buildings.
In 2026, several types of works can benefit from energy renovation grants in Belgium. The amounts and conditions vary by region and household income.
Grants for housing insulation
Insulation generally constitutes the first step in an effective energy renovation. A large part of a home's heat loss comes from the roof, walls, or floors.
Regional grants therefore strongly encourage insulation works.
In Wallonia, for example, certain grants can reach:
- Up to €50 per m² for roof insulation
- Up to €65 per m² for wall insulation
- Up to €40 per m² for floor insulation
In some cases, the total amount of the grant can reach several thousand euros, with a ceiling of up to €6,000 for the roof or €9,000 for the walls depending on household income.
These works help retain heat in winter and maintain a more pleasant temperature in summer. They thus contribute to reducing energy consumption and improving the comfort of the home.
Aids for window and frame replacement
Old windows can be responsible for significant energy losses. Replacing frames and glazing with more efficient equipment is therefore an interesting investment.
Grants can support the installation of high-performance double or triple glazing.
In Wallonia, frame replacement can benefit from aid of up to €110 per m² of glazing, with a ceiling of aid that can go up to €8,000 depending on the project.
In Flanders, grants related to energy renovation are grouped under the Mijn VerbouwPremie, with amounts that can reach €156 per m² for certain works depending on household income.
These improvements help optimize thermal insulation while reducing noise disturbances.
Grants for efficient heating systems
Replacing an old heating system can also lead to significant energy savings.
Regional aids can support...
