Roof insulation, window replacement, heat pump or photovoltaic panels: an energy renovation can reduce heating needs, improve comfort, and increase the value of a property. However, these works represent a significant investment.
In Luxembourg, Klimabonus Wunnen is the main public support. The grants depend on technical criteria, timelines, and specific procedures. Therefore, they must be integrated into the project before the start of the work.
Klimabonus 2026, the main scheme
Klimabonus 2026 provides subsidies to improve the energy performance of residential buildings located in Luxembourg. The scheme can apply to both individual houses and collective buildings.
In August 2026, bill n°8585 was adopted and published. The pages of Guichet.lu further specify that the processing of applications depends on the publication of the law in the Mémorial. Before any commitment, check the definitive entry into force of the text with Klima-Agence or the single housing aid counter.
Relevant insulation works
Klimabonus can support the thermal renovation of several elements:
- Pitched or flat roof;
- Exterior walls;
- Slabs facing the ground, outside, or an unheated area;
- Walls against the ground or an unheated area;
- Windows and patio doors.
The amount depends on the renovated area, the performance level, and the materials used. The building must also meet an age condition. The works must also comply with the technical requirements of the scheme.
Two approaches depending on the project
Multiple elements to renovate
When a project involves several parts of the envelope, energy advice is necessary. It analyzes the property and proposes a coherent set of measures. The owner can then select the works corresponding to their priorities and budget.
A grant is available to finance this advice, up to the actual cost and provided at least one remediation measure is implemented.
Only one element to renovate
For an intervention concerning only one element, such as the roof, an exterior wall, or the windows, a simplified procedure may be possible. The operation must be carried out by a certified company or be subject to the planned occasional support. Once multiple elements are involved, energy advice becomes mandatory.
Grants for technical equipment
Klimabonus can also support certain installations using renewable energy or improving energy management:
- Heat pump;
- Solar thermal installation;
- Photovoltaic panels and, under conditions, battery;
- Eligible wood heating;
- Connection to a district heating network;
- Energy management system.
Requirements vary by equipment. Before signing a quote, check the technical criteria, the qualifications of the installer, and any municipal permits.
Municipal grants and out-of-pocket expenses
Some municipalities offer additional grants for insulation, solar energy, heating replacement, or energy consulting. The amounts, cumulative rules, and deadlines depend on the municipality where the property is located.
Klima-Agence provides free and independent advice to identify suitable schemes. The balance can be financed by personal contribution or a loan. Compare the remaining costs, expected savings, and the lifespan of the equipment before making a choice.
In what order should the steps be taken?
- Consult Klima-Agence;
- Have the property analyzed;
- Define the work and obtain quotes;
- Check national and municipal aids;
- Obtain the necessary approvals before starting;
- Keep invoices, proof of payment, and technical sheets.
The timeline varies depending on the measure. For certain envelope works, a principle agreement is necessary. For some equipment, the request occurs after installation, but eligibility must always be verified before ordering.
Why choose Avenir Rénovations Luxembourg?
Avenir Rénovations Luxembourg supports you in defining, estimating, and coordinating your project. Your Project Manager organizes the various trades and remains your sole contact until completion.
Assistance remains subject to the decision of the competent authorities. However, thorough preparation helps to better secure the timeline and budget.
Contact Avenir Rénovations Luxembourg to obtain a
free and personalized quote.
