Addressing energy consumption and related GHG emissions from buildings constitute a major challenge in the light of the climate crisis. At the same time, the interplay of building policies with other policy areas comes into focus with sector coupling, digitalization but also lifecycle considerations and adaptation to climate change. For the European Commission Directorate-General for Energy, the Buildings Performance Institute Europe (BPIE), Climact, Creara Consultores and Ecologic Institute investigate which lessons can be learned from already existent integrated policy approaches for new buildings and buildings undergoing a major renovation.