Parametric architecture tools have been used to explore design variations and potential possibilities of architecture forms and patterns. It helps the architect to overcome the limitations of traditional tools of modelling. The computer is no longer used as a tool but rather a partner in the design process. The utilization of computers as design partners should aid architects efficiently simulating their design problems and reaching optimum goals at minimum time. As the world gives increased focus on energy efficiency and occupant comfort, there is now an emerging need to include sustainability–related performance aspects within design, most notably energy and daylighting. More recently, new methodologies have been developed to use daylight simulation as a driven tool for design, which showed the benefits of parametric driven façade to reach maximum daylight quality. This paper will discuss how to integrate parametric architecture into daylight simulation in order to reach the optimum daylight performance in the building. The research will explain the parametric architecture techniques and tools used in the optimization process. In addition, the research will track parametric driven façade examples and the parametric process used in the optimization process. Parametric modelling tools along with validated environmental analysis tools (Grasshopper and Diva for Rhino) will be used together to achieve the optimum sustainable design. The goal of the research is to link between parametric architecture as a tool in building aesthetics and daylight simulation.