A comprehensive Scan to BIM project was delivered for a large-scale water treatment facility. Advanced 3D laser scanning technology was utilized to capture precise as-built data of the entire plant, including civil structures, architectural layouts, mechanical systems, electrical rooms, and piping networks. The highly accurate point cloud was transformed into a detailed BIM model that reflects existing conditions with millimeter-level precision. The model was developed to provide a reliable foundation for future design modifications, maintenance planning, and system upgrades. Architectural, structural, mechanical, and electrical disciplines were integrated into a unified digital environment, enabling enhanced project coordination, risk reduction, and effective asset management. Through this project, AJC’s expertise in delivering data-rich, as-built BIM models for critical facilities was demonstrated, ensuring efficiency and reliability in both current operations and future development.