Digital transformation is transforming construction project management by redefining how information is created, processed and shared. Although Building Information Modelling (BIM), Artificial Intelligence (AI) and Project Management Information Systems (PMIS) have each shown value in improving efficiency, their combined effect on sustainability has not been well theorized. This extended conceptual paper responds to this gap by examining how the three technologies interact through data integration, predictive analytics and structured coordination to enhance environmental, economic and social performance. The discussion synthesizes recent research, highlights impact mechanisms, and clarifies organizational conditions for achieving sustainability outcomes.