So far, there are only a few examples in this regard: In the canton of Vaud, a revision of the cantonal law on energy is currently in progress. It will require the renovation of existing buildings, specifically those classified as G and F under the CECB, as these buildings will need to improve their energy efficiency over a period of 10 to 15 years. However, this law is also subject to an optional referendum by the people.

To date, only the canton of Geneva has implemented a mandatory energy performance certificate (indice de dépense de chaleur — IDC). The IDC is an energy performance indicator of a building’s energy consumption to accommodate its heating needs (heating and sanitary hot water). Since 2023, the IDC has been mandatory for every heated building. The index is calculated by dividing the annual energy consumption by the gross floor area of the building. The unit used is “megajoule per square meter per year.” All buildings with an IDC greater than 450 megajoules must undergo an energy audit. The canton of Geneva has also introduced thresholds for significant breaches. Initially, buildings with an index of more than 800 megajoules per square meter per year will be required to conduct energy renovation measures. The canton will issue administrative decisions requiring owners to reduce the index to below 450 megajoules per square meter per year within three years of receiving an official decision. However, buildings with an index between 450 and 800 megajoules per square meter per year must also take measures to improve their energy efficiency.