According to Egyptian prime minister's declaration, Egypt will enter the world of skyscrapers, According to Forbes magazine, Egypt will construct Africa's tallest skyscraper as part of the new administrative capital project. The new building will be worth a whopping US$ 3bn.In the same time , we are facing issues of sustainability which must be taken consideration while the official authority adopts this new trend. There are a many of important factors to consider during a design process of a tall building which need to be examined from a wider urban scale to a narrower architectural scale. as such location and site selection, land-use, integration of landscape elements, the use of natural energy resources (wind, sun, vegetation.), the livable urban areas and building areas and nodes (plazas, innerouter courtyards of the building, service floors), transportation, façade design, material usage. Compatibility between a building and its environment is a significant architectural conversation that should be assessed and evaluated together when trying to find solutions through sustainable architectural design considerations. This paper is aimed to argue the relation between tall buildings and the built environment from the sustainable point of view. Nowadays, sustainable design is being implemented worldwide , it has become a necessity , the international community is divided as to sustainability credentials of tall buildings, there are those who defend the position that densely populated city centers with tall buildings are inherently sustainable, while others believe that the high amount of energy embodied in tall buildings is the indicator of unsustainability.