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Luxembourg offers a generous set of subsidies to encourage energy renovation of existing dwellings and sustainable construction. The PRIMe House programme, revamped in 2024 under the 'Klimabonus' label, covers thermal insulation, window replacement, heat pump (HP) installation, photovoltaic (PV) panels and charging stations. These subsidies can be combined with the 3% VAT on renovation works and the zero-rate Klimaprêt loan. Here are the details on amounts, conditions and procedures.
PRIMe House / Klimabonus subsidies are granted by the Ministry of the Environment, Climate and Sustainable Development via myenergy. Key amounts (2024-2025 schedule): roof/attic insulation up to EUR 55/m²; external wall insulation up to EUR 110/m²; floor/cellar insulation up to EUR 55/m²; triple-glazed window replacement up to EUR 150/m² of glazed area; air-to-water/geothermal heat pump EUR 6,000 to 12,000; photovoltaic installation EUR 500/kWp (max 20 kWp); dual-flow ventilation with heat recovery EUR 3,000 to 5,000. Exact amounts depend on the performance achieved (improvement in EPC class) and may be increased based on social criteria. A 25% bonus is granted if the dwelling is rented at a social rent.
To qualify for Klimabonus subsidies, an Energy Performance Certificate (EPC) must be carried out before and after works by an approved energy advisor. The EPC classifies the building from A (very efficient) to I (very energy-intensive) on two axes: primary energy demand (kWh/m²/year) and thermal insulation of the envelope. Subsidies require improvement of at least 2 EPC classes (e.g. from F to D). For deep renovations targeting class A or B, increased amounts are available. The pre-works EPC must not be older than 2 years. The energy audit itself is subsidised by myenergy (free advice). Works must be carried out by companies established in Luxembourg or the EU, and invoices must be settled within 4 years of the agreement in principle.
Klimabonus subsidies can be combined with the super-reduced 3% VAT rate applicable to renovation and conversion works on housing in Luxembourg (limited to a ceiling of EUR 50,000 in VAT per dwelling). They are also combinable with the Klimaprêt, a zero-rate loan granted by partner banks (BCEE, BIL, Raiffeisen, etc.) to finance energy renovation works. The Klimaprêt amount can reach EUR 50,000 repayable over a maximum of 15 years, interest-free (the State covers the interest subsidy). To qualify, works must appear in the quote validated by myenergy and concern effective improvement of energy performance. In total, an owner renovating an older dwelling from class G to class B can combine EUR 30,000 to 50,000 in PRIMe House subsidies, reduced VAT (saving EUR 10,000 to 20,000) and a 0% Klimaprêt, considerably reducing the remaining cost.
By Erwan Bargain, REV TEGOVA · Updated: April 2026
Yes, PRIMe House / Klimabonus subsidies are fully combinable with the 3% VAT on renovation works and with the zero-rate Klimaprêt. It is one of the most advantageous schemes in Europe for energy renovation.
The subsidy for installing a heat pump (air-to-water or geothermal) ranges from EUR 6,000 to 12,000 depending on type and capacity, under the PRIMe House / Klimabonus programme. This amount can be increased by 25% if the dwelling is rented at a social rent. Additionally, the 3% VAT benefit and zero-rate Klimaprêt apply.