In Austria, there is a mandatory form of energy performance certification for buildings, known as the "Energieausweis." This certification was introduced with the Energieausweis-Vorlage-Gesetz 2012 (EAVG 2012), which implements the Energy Performance of Buildings Directive. It is required whenever a building is constructed, sold, rented out, or undergoes major renovations. It provides information about the energy efficiency of the building to potential buyers or tenants. The "Energieausweis" includes details about the building's energy consumption, such as heating and cooling systems, insulation and overall energy efficiency rating. It helps individuals make informed decisions regarding energy usage and costs associated with a particular building.
Regarding prescribed minimum standards, Austria's federal states have building codes/regulations in place to ensure that buildings meet certain energy efficiency criteria. Certain standards have been outlined by the Austrian Institute for Structural Engineering (Österreichisches Institut für Bautechnik — OIB) — a coordination platform of the Austrian federal states — in the OIB guidelines ("OIB-Richtlinien"), which are periodically updated to reflect advancements in technology and changes in energy efficiency requirements. The federal states can declare the OIB-Richtlinien to be binding in their building regulations, which is already the case in a few.