A FAO*1 report indicated that young people are increasing worldwide. Statistics indicate that the percentage of youth (18-35) is about 33% of the total population in 2006. so, the U-20 age category represent 70% of the population, a unique structure of Egypt. The Egyptian society, now and in the future, is a youth society. A recent official statistical report (2007) revealed that the number of never married young men and women, though 35 in age, reached about 12 millions. Hence, came the cause of attention to solving the lowincome youth housing problem. Distinguishing between giving tranquilizers and providing radical solutions for housing problems; is vital for solving them. It can be said that there is a causative relationship between (the low productivity of low-income youth) and (the obstacles to solving the housing problem). So, it takes an integrated work system, and nontraditional meanswhether by the state, the individuals, or the NGOs *2- to solve this problem. This paper attempted to study the gap between supply and demand, and the role of the government for creating some balance by turning towards new cities: starting from youth housing projects and ending by the projects "Build your house" and "Build your apartment"- a new project under study. But, were these cities an attraction or an expeller for youth and low-income? Is it possible to take new decisions to measure the efficiency of these projects after handing residential units to users (post-occupancy evaluation)? How far are users satisfied with these units? How can these units be preserved and maintained? This is done by evaluating these projects, and studying their cons and pros to make use of the evaluation results in similar future projects. Despite being a third generation new city; New Assiut City suffers, like any other new city, from youth abandonment. Though there were official attempts to relieve the burden from youth's shoulders; still youth abandon New Assiut City, with a number of residents not exceeding 37%, 15 thousands in 2009*3, of the total targeted number estimated by 40 thousands in 2010, according to the first planning of the city. Thus, a gap emerged between the theoretical view of the government and the designer, in one side, and the facts of users' needs. A frame was reached, trying to integrate the different views of accomplishing users' needs and their concept of a suitable house. As for post-occupancy, we are trying to study residence (some models from the national youth housing project in New Assiut City) to learn how convenient it is for users and try to avoid defects in such future projects, in an attempt to achieve the most convenient residence for occupants.