This "Working Group" describes the integration of gray energy and other LCA data into the BIM methodology. The focus is on the question of how the gray energy and other LCA data can most easily be integrated into the BIM methodology. This should allow architects and planners to optimize the life cycle assessments of the entire construction project from planning to implementation. The main objective is to develop a broad consensus (understanding) and to test the first applications of LCA data in BIM.