Testing The Validity Of The Impacts Of Gated Communities On Urban Development In Egypt Testing The Validity Of The Impacts Of Gated Communities On Urban Development In Egypt Dr. Islam Ghonimi Ibrahim Lecturer, Shoubra faculty of engineering Benha University Dr. Hassan Elzammly Assistant Professor, Shoubra faculty of engineering Benha University. Dr. Mohamed khairy Assistant Professor Shoubra faculty of engineering Benha University. Dr. Mohamed Soliman, Assistant Professor Shoubra faculty of engineering Benha University. Abstract: This paper is based on a Ph.D. dissertation that theoretically examined the contribution of GCs to urban development, it is theoretically concluded that GCs could impose negative impacts on urban development, and that GCs are characterized by a diversity of physical and social characteristics that gives rise to a great variety of impacts on development. This paper poses to practically test the validity of the previous theoretically discussed hypotheses. First: to test the impact of GCs on urban development in the case of the New Cairo Settlement, Egypt. Second: to test the validity of such impact for different GCs individual, location and grouping characteristics. The research depends on a field study application and statistical analysis. 10 case study are selected, their measurements for the variables are documented, and finally a statistical analysis undertaken through SPSS version 10 to reach the results. It is concluded that GCs strongly have negative impacts on urban development, but it was perceived according to type of residents and according to the physical and social characteristics of the micro community and adjacent community. It is concluded that it is important to stop looking at GCs as a broader concept than simply one type, and that some characteristics proved to be strongly correlated with urban development. Aim: Different studies have analyzed the contribution of GCs to urban development. Two conclusions were deduced: the first is related to the negative impacts that GCs could impose on urban development, the second is related to the fact that the diversity GCs socio-spatial characteristics should differentiate their impacts on urban development. The aim of this paper is to provide empirical evidences, and to test the validity of these hypotheses in the case of GCR new towns. Methodology: In order to achieve this aim, the research depends on a field study application, practical measurement and statistical analysis. The field study based on data from GCs and its adjacent urban fabric. The field study will go through four stages to achieve these goals. First: Case study selection: 10 case study areas are selected. Second: Data Gathering with defining methods, tools, and methodologies of collecting. Third: Data Classification including the documentation and measurements of the variables. Finally: Data analysis: statistical analysis undertaken to test the hypotheses of the research through SPSS version 10 to reach the results.