Building production encompasses every stage of the construction process, from design and construction to facility operation and maintenance. Our research focuses on advancing the construction process itself by leveraging cutting-edge digital technologies such as BIM (Building Information Modeling) and AI, including Large Language Models (LLMs). Examples include automatically checking whether buildings comply with regulations and extracting information necessary for construction planning. Our goal is to realize the next generation of building production connected to digital and information-driven construction, and to help shape the future of the construction industry. In addition, through field investigations at actual construction sites and interviews with engineers and practitioners, we verify that our research outcomes are practically useful in real-world settings while exploring new approaches to building production enabled by digital technology.