This book includes peer reviewed articles from the International Conference on Digital Frontiers in Buildings and Infrastructure (DFBI2025), held on 11-13 June at Delft in The Netherlands. It highlights the transformative intersection of digital technologies and the built environment through a curated collection of cutting-edge research presented at DFBI2025. Hosted by the prestigious Technische Universiteit Delft (TU Delft), the conference brings together world-leading researchers, practitioners, and innovators to address critical challenges in digital construction and infrastructure development. The proceedings showcase groundbreaking advances in Digital Twin technology, BIM-IoT integration, robotics and automation in construction, 3D printing, modular construction techniques, and data-driven decision-making using artificial intelligence and machine learning.The value of this collection lies in its dual focus on theoretical frameworks and practical applications, making it an invaluable resource for multiple stakeholders in the Architecture, Engineering, Construction, and Operations (AECO) industry. For researchers, it provides a state-of-the-art overview of current trends; for practitioners, it offers immediately applicable solutions through real-world case studies; and for industry leaders, it presents strategic insights into emerging technologies and their potential impact on business models.With contributions from renowned international institutions and industry leaders, this collection presents innovative solutions for sustainable development and smart-built environments. This book serves as an essential resource for understanding and implementing digital innovations in building and infrastructure projects while addressing crucial aspects of sustainability, efficiency, and resilience. Distinguished by its comprehensive coverage and practical orientation, this book represents a significant milestone in documenting the digital frontier of civil engineering and construction technology.