It is a label allowing you to easily compare the energetic performance of different buildings, without being an expert.

Initially, introduced to meet the new European Union requirements, the energy passport (energiepass) is compulsory since 2007 for any property sale or construction.

Luxembourg decided to go even further than the European requirements. Since 2017, new houses and apartments need to be built in accordance to the most strict energy class, called “triple A”. This places Luxembourg as one of Europe’s frontrunners with regard to the limitation of buildings’ ecological footprint!

What does the process involve?

To establish a passport, some information will have to be communicated to the chosen expert company: address of the building, construction year, type and year of the heating, type of hot water supply. Some complementary documents will also be asked: breakdown of the annual charges, energy and water bills, property floor plans. To save time, try to gather the documents before the appointment.

Once the company has all the documents and has finished recording different on-site measurements, it will take up to a week to receive the final result.

It usually costs between € 500 and € 1,000 and is valid for a duration of 10 years. It should be noted that a passport is valid on the whole building. This means that for an apartment block, each individual apartment does not require one.

Understanding the result

The main result that should be understood is the energy output index. It calculates the required energy to maintain the building, and uses a standard method fixed by law. The result is expressed using a letter classification system, similarly to electronic appliances, ranging from A to I.

The passport also determines the thermal isolation index. It calculates the building’s need in heating, and is expressed using the same letter classification system. Here, the quality of the building envelope is taken in account: walls, ceilings, windows and roof. Other information is also available in the passport: detail of the building’s energy requirements, CO2 emissions, and recommendations in regards to energy optimization (and related estimated costs).

That’s it, now you know everything in regards to the energy passport!