Gebäudeenergiegesetz

Germany's Building Energy Act (Gebäudeenergiegesetz, or GEG) sets mandatory standards for the energy efficiency of buildings, affecting everything from heating systems to insulation requirements. If you're renting, buying, or renovating a property in Germany, you'll need to understand how this law shapes renovation timelines, costs, and what upgrades landlords or sellers must disclose. The regulations have become stricter in recent years, making energy performance a key factor in real estate decisions and long-term housing expenses.