This book showcases the valuable contributions made during the online event entitled The International Conference on Knowledge Transfer in the Sustainable Rehabilitation and Risk Management of the Built Environment. The conference was held on December 15-16, 2021, and was organized as a multiplier event of the European project Rehabilitation of the Built Environment in the Context of Smart City and Sustainable Development Concepts for Knowledge Transfer and Lifelong Learning (RE-BUILT). This book specifically retains the same main themes explored in the book titled Critical Thinking in the Sustainable Rehabilitation and Risk Management of the Built Environment - CRIT-RE-BUILT. The papers included in this book are mostly authored by partners in the project's consortium and cover various aspects of civil engineering knowledge transfer in crucial areas, to address different perspectives and significant challenges related to the sustainable built environment. The book seeks to provoke ideas and discussions, particularly in the areas where risk management and sustainable rehabilitation of the built environment intersect, ranging from reducing hazard risks to enhancing sustainable rehabilitation efforts in the field.