Financial aid for energy efficiency renovation of a residential building (Klimabonus 2026)
Last update
Important information: Continuation and partial reform of the 'Klimabonus Wunnen' financial aid scheme
You will be able to submit your application for the Klimabonus Wunnen 2026 financial aid scheme from 1 January 2026, the date on which the scheme is scheduled to take effect, with retroactive effect if the law has not been published before that date. However, because the law is still going through the legislative procedure, the processing and consideration of your application remain subject to the publication of the law in the Official Journal.
Summary:
You can apply for financial aid under the Klimabonus 2026 scheme subject to certain conditions.
The Environment Agency (Administration de l’environnement – AEV) grants subsidies for energy efficiency enhancement works.
Depending on the scope of the works, you can choose between 2 aid application procedures for the energy efficiency renovation of a residential building:
- one based on an energy performance assessment; or
- one that does not entail an energy performance assessment and is limited to a single construction element of the thermal envelope.
This Klimabonus aid can only be granted once per construction element, and only for a residential building located in Luxembourg.
Who is concerned
Anyone who wishes to improve the energy performance of their residential building – that is, any:
- natural person;
- legal person established under private law;
- public legal person other than the State.
You can submit your application in your capacity as:
- the legal representative of a group of natural or legal persons, provided that you are a part of this group yourself;
- the owner(s) of the dwelling, except when there is a change of ownership and the new owner of the dwelling and/or technical installation forgoes the aid in question for the benefit of the former owner who made the investments.
Prerequisites
Subsidies are granted for energy efficiency renovation works for which invoices are issued between 1 January 2026 and 31 December 2035.
Deadlines
The first application for an agreement in principle must be submitted between 1 January 2026 and 31 December 2030 inclusive.
Applications for the financial aid must be filed with the Single point of contact for housing assistance no later than 4 years after 31 December of the calendar year in which the invoice was issued.
How to proceed
Submitting the application
Applications for aid must be filed with the Single point of contact for housing assistance (Guichet unique des aides au logement).
- Energy efficiency renovation of a residential building based on an energy performance assessment by an approved energy consultant
- Energy efficiency renovation of a residential building that does not entail an energy consultation and is limited to a single construction element of the thermal envelope
The energy performance assessment provides you with an energy performance assessment of your current dwelling. A set of potential renovation measures are proposed to achieve a higher energy classification (class A, B or C). You then choose the renovation measures you would like to implement based on your needs and budget.
Financial aid for an energy consultation is available in the amount of:
- EUR 1,700 for a single-family residence (a house);
- EUR 2,000 for a residence comprising 2 flats. A EUR 60 supplement is added to this base amount for each additional flat. The total amount of aid is capped at EUR 3,000.
Financial aid will only be granted if at least one energy efficiency measure is implemented. The amount of the financial aid can never exceed the actual cost of the energy performance assessment.
The invoice for this energy consultation must be issued between 1 January 2026 and 31 December 2030 inclusive.
This simplified procedure allows you to quickly renovate a single element without the need for an energy performance assessment. This single element may be:
- the pitched or flat roof;
- an external wall;
- the ceiling slab in contact with an unheated zone;
- the floor slab in contact with an unheated zone, the ground or the exterior;
- a wall in contact with an unheated zone or the ground; or
- windows and French windows.
The renovation work must be carried out by an approved business or must be performed in the presence of an energy consultant. If an energy consultant occasionally monitors the works, financial aid of EUR 400 may be granted.
A supplement of EUR 100 is available to subsidise the energy consultant's verification of the conformity of the estimates.
If you wish to renovate more than one element, the energy consultation is mandatory.
Good to know
The Klimabonus scheme applies to sustainable energy efficiency renovations of residential buildings older than 10 years from the date of issue of the building permit.
Who to contact
Klima-Agence
- Address:
- 2, circuit de la Foire Internationale L-1347 Luxembourg Luxembourg
- Phone:
- (+352) 8002 11 90
- Email address:
- info@klima-agence.lu
- Website:
- http://www.klima-agence.lu
Ministry of Housing and Spatial Planning Single point of contact for housing assistance
- Address:
- 11, rue de Hollerich L-1741 Luxembourg Luxembourg
- Phone:
-
(+352) 80 02 10 10
Monday to Friday from 8.00 to 16.00
- Fax:
- (+352) 45 88 44
- Email address:
- info@ml.etat.lu
- Website:
- http://www.logement.lu
Closed ⋅ Opens Monday at 8.00
- Friday:
- 8.00 to 12.00 , 13.30 to 16.00
- Saturday:
- Closed
- Sunday:
- Closed
- Monday:
- 8.00 to 12.00 , 13.30 to 16.00
- Tuesday:
- 8.00 to 12.00 , 13.30 to 16.00
- Wednesday:
- 8.00 to 12.00 , 13.30 to 16.00
- Thursday:
- Closed
Related procedures and links
Procedures
Links
Legal references
instituant un régime d’aides pour la promotion de la durabilité, de l’utilisation rationnelle de l’énergie et des énergies renouvelables dans le domaine du logement
