2026 marks a turning point for construction in Luxembourg. New standards come into force, with strengthened requirements for energy efficiency and sustainability. Here’s what’s changing.
New Energy Requirements
Luxembourg is strengthening its climate ambitions through construction regulations.
The minimum energy class moves from B to A for all new constructions from January 2026. This implies enhanced insulation, efficient heating systems and optimal airtightness.
The carbon footprint of materials becomes a criterion. Building owners will need to justify the environmental impact of chosen materials for projects over 500m².
On-site renewable energy production becomes almost mandatory, with photovoltaic or solar thermal panels required on suitable new roofs.
The Impact on Construction Costs
These new requirements will affect budgets.
The estimated additional cost is between 5% and 15% compared to current standards. This extra cost will be partly offset by energy savings over the building’s lifespan and maintained Klimabonus grants.
Bio-sourced materials like wood and cellulose wadding could become more competitive against traditional solutions.
Procedural Changes
The building permit will incorporate new checks.
An enhanced thermal study will be required from file submission. Airtightness testing will become systematic at end of construction. A provisional energy performance certificate will be issued before handover.
How to Prepare
If you have a construction project, here are our recommendations.
For 2025 projects, submit your permit application before end of 2025 to benefit from current standards if your project is ready.
For 2026 projects and beyond, incorporate new requirements into your design now. This will avoid costly mid-project modifications.
In all cases, work with professionals trained in new standards. Architects and craftsmen on Tack are informed of these developments.
FAQ
Do these standards apply to renovations?
Partially. Major renovations of more than 50% of the surface will need to meet intermediate requirements. Small works are not affected.
Will Klimabonus be maintained?
Yes, the grants programme is confirmed until at least 2030, with amounts adapted to new requirements.
Can I still build a gas-heated house?
No, gas and oil boilers have been banned in new constructions since 2023. This ban remains in force.
