Building Information Modeling (BIM) process is increasingly adopted for digitising the building stock, enhancing knowledge of the architectural heritage and fostering the adoption of sustainable design choices and management practices in a circular economy framework. This study investigates the application of BIM for the digitization of a condominium in Udine (NE Italy), constructed during the post-WWII period, to foster deconstruction practices. The research pursues two key objectives: enhancing academic insights into the building’s materials and sustainability features, and providing property owners and administrators with valuable information on potential material reuse in the context of End-of-Life management. The “Trevi” condominium, built in Udine between 1966 and 1969, like many buildings from the post-WWII period, was constructed using a variety of materials and techniques that were innovative for their time but may now pose challenges for future maintenance, renovation, or demolition. The adoption of BIM in this case study supports sustainable management practices, opening up to circular economy approaches. The material data extracted from the digital model is critical for assessing the viability of urban mining, where materials from existing structures can be harvested and reintroduced into new building projects. By evaluating the material composition, the study can outline a strategy for property owners, and for the local administration, on how to manage a possible building’s deconstruction. This proactive EoL planning aims to reduce waste and lower the environmental impact of the building’s future disposal. Moreover, the digitisation process through BIM creates a permanent and accessible repository of knowledge about building materials and components, supporting deeper exploration of reuse potential of post-WWII architecture. Through documentation of the building structure and quantification of its materials in a digital environment, researchers can gain valuable insights into the construction practices of the period and assess the lifespan and performance of materials used in similar structures.