This research focuses on a new workflow between Space Layout Planning (SLP) and Building Performance Simulation (BPS) fields for the early stages of building design aimed at reducing energy needs of a building and improving indoor environment quality. Parameters of environmental performance requirements (such as temperature, view, and acoustics) from different international norms were selected. The purpose is to link these performance parameters to a graph file. This graph supports schematic design tasks during the creation of architectural floor plans. Programming tests were run to add the information to the graph. A prototype for the early stages of the design is presented. In this prototype, designers can visualize performance information during schematic design of floor-plans of a building. A study case is presented to demonstrate the usability of the concept.