Abstract: The renovation projects of old residential communities are large in scale and highly complex, requiring the involvement of multidisciplinary professionals. Research on leveraging information technology to enhance the standardization of planning and design and improve collaborative efficiency remains insufficient. Based on the perspective of collaborative design, this study explores effective pathways for multi-disciplinary collaborative design in complex scenarios, using the installation of elevators in old residential communities in Guangzhou and Shenzhen as typical cases. Firstly, after systematically analyzing relevant planning and design specifications for elevator installations, the study translates critical planning and design elements into parametric indicators. Then, experts evaluate the importance and feasibility of installing elevators in collaborative design through scoring; Ultimately, a parameterized index system for elevator installation planning and design covering four levels: community layout, building units, elevator buildings, and elevator units will be formed, and an example verification will be conducted based on City Engine for modeling. This paper proposes an operable and replicable technical pathway for collaborative design, which can serve as a reference for effectively integrating BIM technology and parametric design in complex planning and renovation scenarios.