From circular strategies to actions: 65 European circular building cases and their decarbonisation potential

•This study analysed and visualised 65 novel real-world cases of new build, renovation, and demolition projects in Europe compiled from academic and grey literature.•In total, 133 applications of circular strategies (52 of slowing, 29 of regenerating, 28 applications of narrowing, 24 of closing resource loops) across the cases were identified.•Results show that significant carbon savings were achieved across new build, renovation, and demolition projects.•The identified challenges of using LCA for CE assessment in buildings are discussed and methodological approaches for future research are suggested.