This book reports the dynamic progress made in Construction 3D Printing. It compiles the wealth of knowledge shared at the conference, which took place from 19-21 July 2023 at Nanyang Technological University (NTU, Singapore). Building on the success of its inaugural event at Swinburne University of Technology in Melbourne (Australia) in November 2018, the 2nd edition convened at Hebei University of Technology in Tianjin in October 2019, and the 3rd conference was held virtually in June 2022, predominantly organized by TongJi University, Shanghai. Moreover, in May 2021, Southeast University (Nanjing) orchestrated an International Conference on 3D Printing Concrete Materials and Structures in an online format. Encompassing a wide array of topics, this book presents works into established technology, modeling, simulation, materials (including recycled materials and concrete), geopolymer, fiber reinforcement and composite materials, testing and standards, applications, Building Information Modeling (BIM), design, optimization, structural and intelligent monitoring, as well as robotics and automation. This book serves as a timely and invaluable reference for both scholars and professionals in the expansive realm of Construction 3D Printing, offering insights into its progress over the last decade and its readiness for wider adoption.