This research aims to develop a hybrid methodology to support lean management to improve the sustainability of the construction phase. The combination of Value Stream Mapping and Process-based Life Cycle Assessment is enhanced by integrating with simulation methods to consider the environmental performance of the construction phase. Data from predefined process patterns, Life Cycle Assessment databases, and Building Information Modelling models, are used as input to the simulation-based Value Stream Mapping model. This methodology will enable an examination of the environmental impact of particular situations as what-if scenarios, during the planning and construction phases, without compromising the achievement of the construction process objectives.