Luxembourg: unsuspected potential for energy renovation

Cold in winter, hot in summer, soaring energy bills... If you're a homeowner, you know that it's not unusual to complain about temperature differences. And with good reason: many older properties in Luxembourg are very poorly classified.

If you also heat with oil or gas, you'll pay dearly every winter...

Good news: you're not alone. These are the findings of our latest survey, based on over 2,500 simulations carried out on Renov.lu. According to the initial results :

• 82% of homeowners in Luxembourg can improve their house by at least 4 energy classes by carrying out a major renovation (complete insulation, heating, glazing, ventilation)
• Half can even improve by at least 5 energy labels (from G, H or I to B, C, D or E).

In detail:

• The average Luxembourg house estimated on Renov.lu has an energy score between F and G
• Most of these are 70s houses with gas or oil heating, double glazing, no mechanical ventilation and little or no thermal insulation.
• This average Luxembourg house has the potential to achieve a B energy passport. with a comprehensive renovation
• In this scenario, homeowners can save an average of €1,560 a year on heating costs

For homeowners who are still thinking about buying a new home, this is the perfect opportunity to take the plunge. energy renovation in the Grand Duchy.

Why do houses in Luxembourg have such a low energy score?

There are two reasons why many houses (whether semi-detached or free on all 4 sides) generally have a fairly low rating in Luxembourg:

1. The Grand Duchy's housing stock is ageing: Most of the houses were built between 1970 and 1990. Thermal insulation was lacking. Also, the boilers are generally oil or gas fired: a particularly disadvantageous point for the energy passport.
2. The Luxembourg rating system is particularly strict (more so than that of our neighbours): an energy class D in France or Wallonia will correspond to an F in Luxembourg. With such a strict scale in France, many properties would no doubt be off-limits to tenants in a few years' time! But it's also an opportunity for Luxembourg landlords, who can easily move up energy classes and increase the value of their property.

If you too have a house with an F, G, H or I energy rating, don't panic! It's very easy to put things right.

How can you improve your property by several energy classes at once?

The short answer: by making a comprehensive energy renovation of your home. Consider thermal renovation as a whole. Each insulation measure will have an impact on the overall energy rating of your property.

The long answer:

• Start by analysing your home's energy performance: Are your walls insulated? With what type of material? What's under your roof? How are your windows and doors? What are your energy costs?
• Consider a thermal insulation of your home : Start by insulating your walls or roof. These two elements will enable you to eliminate 50% of heat loss.
• Next, tackle the heating system: oil and gas boilers are particularly energy-hungry. The heat pumps are much more efficient.
• As a bonus, you can also install double-flux mechanical ventilation: This device will ventilate your home while heating the air drawn in with the air extracted, for maximum energy savings.

Don't forget that you can benefit from government bonuses for all energy renovations in Luxembourg.

The advantages of energy renovation in the Grand Duchy

While financial assistance is being reduced in many countries, subsidies in Luxembourg are being maintained at a very attractive level for homeowners. And with good reason: the Luxembourg government is aiming to reduce greenhouse gas emissions by 55% by 2030.

There is therefore a great opportunity to embark on an energy renovation project in 2026.

As our study shows, by renovating :

• It is possible to save several hundred/thousands of euros a year on heating
• You can apply for financial assistance (generally around €40,000 or even €50,000 per project)
• The value of the property increases from +10% to +15% compared with surrounding properties (in an area where few houses are renovated, yours will inevitably be worth more)
• And finally: occupant comfort is greatly improved

Are you planning to renovate in the near future? Request a free quote

Methodology of our study on renovation potential in Luxembourg

Our survey is based on a total of 2,500 estimates made on our energy renovation simulator. On these estimates :

• Half of homeowners can improve their property by at least 5 energy classes
• 82% can improve it by at least 4 energy classes

These figures are based on estimates for houses, not flats (where energy renovation has to be carried out at building level to have an impact on the energy label).

Find out more, estimate your energy renovation potential.