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Almost 75% of the existing building stock is energy inefficient. Thus, to ensure that buildings meet the EU’s 2030 energy targets, energy retrofits supported by sustainability certification, such as Leadership in Energy and Environmental Design (LEED®) schema, must be widely performed. This research developed an innovative Business Process Model (BPM) framework based on Building Information Modelling (BIM) and energy analysis that contributes to the LEED® certification process for retrofit purposes. A comprehensive literature review was carried out to identify LEED® credits that are possible to gain using BIM and energy analysis technologies. Next, the BPM methodology was applied to the “Optimize Energy Performance” credit, by comparing a building’s performance pre- and post-retrofit.