The article discusses the importance of using sustainable practices in building design and operation to conserve natural resources. It emphasizes the need for comprehensive product information to improve resource efficiency in all building activities. Standardization efforts are being made to exchange information between product and building levels, beyond just Environmental Product Declarations. Building files with detailed material information are proposed to provide useful data for third parties like facility managers and demolition companies. The research in Germany is focusing on determining and presenting the recycling potential of buildings.