In Luxembourg, The Energy Performance Certificate (CPE), also known as the "energy passport", indicates a building's energy performance. This document, valid for 10 years, classifies buildings from A (high performance) to I (low performance) based on three criteria: primary energy consumption, heating requirements and CO₂ emissions.
In principle, every residential building in Luxembourg has an energy passport. However, if you carry out renovation work that has an impact on the energy performance of your home, or if the cost of changes you make to your technical installations exceeds €1,500 (for a single-family home) or €3,000 (for a multi-family home), a new certificate must be established. While no subsidies are available to have this document drawn up, it is very useful for valuing a property and attesting to its energy efficiency.