Valentino Castle, a UNESCO World Heritage site and the core educational venue for Politecnico di Torino's Architecture and Design department, is pivotal for research and studies in different domains. The field of architectural heritage conservation and research on Valentino Castle has developed a series of profound study results and comprehensive archival records. Facing these data complexity and environmental degradation, a digital documentation system is vital. It consolidates historical findings and supports the castle's upkeep strategies. Heritage Building Information Modeling (HBIM) stands out in cultural heritage preservation, merging geometric and semantic data for historical analysis, monitoring, and interventions. It boosts information management efficiency and responds to environmental shifts.