The last few decades, Egypt like many other countries in the world, drawn into a dramatic socio-economic change that caused a change in development patterns from traditional to modern neighborhood and modern city planning strategies. Planners and authority thought that this change could be a solution for old town's problems, where residents can find safety, open greenery spaces and low traffic. On the other hand, different scholars have emphasized that traditional compact, mixed use, high-density urban forms are important for reaching sustainability goals in term of environmental, economic and social advantages. Based on a comparison of three cases studies Shubra, Heliopolis, and new Cairo city; this research examine the sustainability of New Egyptian Settlements. The analysis depends on observation and spatial analysis to investigate the variations of performances between the three case studies in terms of urban, social, environmental, and economic sustainability indicators. The purpose is to examine the contribution of moving from traditional to modern urban form with reference to Greater Cairo Region' new towns and to extract development criteria to enhance the sustainability of modern settlements based on lessons learned from traditional urban form.