The aim of this edited book volume is to present new concepts, case studies and applications of Digital Twin and relevant tools in the built environment context. The book highlights a wide range of applications and practices that allow practitioners to improve the efficiency of different elements of the built environment through the entire life cycle, including planning, designing, construction, and operation. The chapters discuss the different components of these technologies and integrate them with other sensing tools and technologies used in the built environment to manage core project objectives, including safety and risk, quality, time, energy-saving, and costs. The book also discusses businesses models and the digital transformation process, including cyber-physical systems, human-machine interactions, and connectivity in smart environments. This book is essential reading for practitioners, engineers, managers, and technicians involved in any phase of the built environment from design to operation and other Architectural, Engineering, and Construction (AEC) stakeholders who are a part of digital transformations, as well as researchers, educators and students interested in the field.