Although the effect of natural ventilation on, indoor heat conditions and minimizing energy efficiency loads of an atria, there is lack of knowledge on how different design parameters affect atria with green roof technique heat conditions. In the last 25 years, researchers proposed and created many ways to simulate numerical and experimental buildings to test the effectiveness of ventilation and thermal comfort inside spaces of atria. This paper investigates the impact of Vernacular architecture on thermal comfort of office buildings - using the court & green roof techniques & the role of natural ventilation in hot temperatures, with suitable design parameters and applying them to improve the performance of thermal comfort and decreasing energy use by using Energy Plus software.These parameters include court configuration and contents such as characteristics of openings and geometry and, then combining these parameters of the courtyard with green roof properties in the hot arid zone like in Egypt. It also focuses on different techniques of ventilation that can be utilized in atria as a hybrid ventilating technique. For this reason, based on literature review and simulation tool, investigation of energy efficient courtyard design according to shape will be done, ventilation, and performance of the courtyards in terms of thermal comfort, so that energyefficient performance of the building can be improved with court & green roof system. Thus, it is expected from the results of this study to encourage building designers and decision makers to consider the terms of environmental concerns and energy efficient building design in the design phase of building.