Cost of Replacing 10 Windows in Luxembourg (2026 Guide)

Why Replace Your Windows in Luxembourg?

Replacing windows is one of the most effective home renovations to improve thermal comfort and reduce energy bills. In Luxembourg, with cold winters and increasingly hot summers, high-performance windows are essential. Moreover, with rising energy costs, investing in efficient windows is a wise long-term choice.

This guide details the real costs of replacing 10 windows in a Luxembourgish house, factoring in materials, labor, financial aids, and administrative steps.

What is the Average Price of a Window in Luxembourg?

The price of a window depends on several factors: material (PVC, wood, aluminum), size, opening type (casement, tilt-and-turn, sliding), glazing (double or triple), and hardware quality. On average, for a standard window of 120 x 130 cm, installed by a professional, expect:

These prices include removal of old windows, installation, sealing, and finishing. For larger or custom windows, costs can increase by 20-50%.

What Factors Influence the Price?

• Material: PVC is most economical; wood offers natural aesthetics but requires maintenance; aluminum is durable but pricier.
• Glazing: Triple glazing improves insulation but adds €200-€400 per window.
• Opening type: Tilt-and-turn windows cost more than simple casements.
• Dimensions: Large picture windows or special shapes increase cost.
• Installation: Renovation installation (in existing frame) may be cheaper than new construction.
• Labor: Artisan hourly rates in Luxembourg range from €50 to €80.

For a 10-window project, total costs can vary significantly. A typical example: a 1980s house with 10 medium-sized PVC windows replaced with triple-glazed models will cost around €15,000.

What Financial Aids Are Available for Window Replacement in 2026?

Since January 2026, the Klimabonus Wunnen program (managed by Klima-Agence) has replaced the former PRIME House. It offers subsidies for energy renovation, including window replacement. Specifically, you can receive €70 per m² of replaced glazing, provided the new window meets certain performance criteria (e.g., Uw below 1.0 W/m²K).

For a house with 10 windows, if the total glazing area is 15 m², the subsidy amounts to €1,050. This is deducted from the total cost after work.

Other aids exist: reduced VAT of 3% for renovation work (if the home is over 2 years old), and possibly communal aids. It is essential to submit an application before starting work via Klima-Agence or guichet.lu.

What is the Final Cost After Subsidies and Reduced VAT?

Let's revisit the typical example: 10 PVC triple-glazed windows with a total glazing area of 15 m².

• Cost of windows and installation: €15,000
• Reduced VAT (3%): Instead of 17% (standard VAT), you save about €1,800 (since VAT is included in the price). In practice, the artisan's quoted price includes VAT at the applicable rate. If they apply 3% VAT, the total cost will be lower by about €1,800 compared to a pre-VAT price.
• Klimabonus subsidy: 15 m² x €70 = €1,050
• Net cost after aids: approximately €15,000 - €1,050 = €13,950 (excluding VAT). If the initial price is TTC with 3% VAT, the final cost will be close to €13,950.

In this illustrative case, the real cost for 10 windows is therefore about €14,000. Without aids, it would be €15,000.

How to Choose the Right Artisan and Avoid Scams?

In Luxembourg, construction trades are regulated. For your windows, hire a qualified artisan registered in the trade register. Request multiple detailed quotes, specifying brand, dimensions, glazing type, energy performance (Uw coefficient), and installation cost.

Check customer reviews and ask for references. Beware of too-good-to-be-true offers that may hide inferior materials. A certified professional will advise on available aids and handle administrative procedures if needed.

What Are the Administrative Steps for Aids?

To benefit from Klimabonus Wunnen, you must:

1. Check eligibility on klima-agence.lu.
2. Have a quote from a certified artisan.
3. Submit an aid application before work begins (via guichet.lu or directly to Klima-Agence).
4. After work, send the paid invoice and necessary documents.

The subsidy is paid after validation. Processing times vary, but expect about 2-3 months.

What is the Return on Investment?

Replacing windows improves insulation and reduces heat loss. In Luxembourg, a typical house can save 10-20% on heating bills after such work. With average heating costs of €2,500 per year, annual savings can reach €500.

Moreover, comfort is significantly enhanced: fewer drafts, better sound insulation, and more stable temperatures. The property's value also increases, an advantage if you sell.

In summary, investing in 10 high-performance windows costs between €10,000 and €25,000, but aids and energy savings make this investment worthwhile in the long run.