The Islamic law is a clear path for human life, and a guide to his behavior and decisions making in all aspects of his life: like design and planning of the buildings and urban communities., in the past decades many studies revealed the deterioration in the buildings facades that appears in neglecting the Islamic values and principles, which call for lowering the gaze and respecting the neighbors privacy. Currently the design facades do not provide enough privacy for the buildings users and their neighbors; despite the availability of the Islamic legislation, scientific studies, and the solutions and architectural techniques which help the architects to achieve the privacy. This study aims to explain, analyze and discuss the obstacles which prevent the architects in Egypt to achieve the external privacy in the residential buildings facades. Through a questionnaire about the opinions of a number of bachelor architecture students and academic experienced architects; This study revealed that legislate a building law based on the Islamic law and scientific studies for planning and constructing the existing and new urban communities will help the architects to develop their creative abilities to achieve buildings that provide all kinds and levels of the privacy which suited to Islamic communities, and also regulating the formation of the buildings facades such as openings places, shapes and materials will help such openings to do its various functions taking advantage of the scientific and technological development in materials, construction techniques and systems.