A post office branch registered with EGBC (Egypt green building council) as the first sustainable post office in egypt to achieve TARSHEED Certification. The aim of this project is to achieve the highest quality and efficiency of interior environments, in which employees and customers can have the most experience in terms of space; thermal comfort, natural lighting, reliable artificial illumination and appropriate air conditioning. As the impact of the design on users and surroundings is a crucial part of the design and construction process measures are taken to have a holistic approach for the health of users and the environment.