The great population development and the growing demand on housing is considered the main reason for Unplanned Housing, that afflict Syrian governorates centers, especially during the period between (1981– 2010), the thing which resulted in the emergence of numerous problems, due to importance of this subject-matter and its influence on all aspects of life, and the necessity to find proper solutions to these outstanding problems in Syria. The study of this subject included the research problem, its importance, objectives, courses and population growing number in Syria, and Governorates' City Centers and the affecting factors, along with the immigration to these cities, distribution of unplanned housing in them, with their areas and rates of inhabitants, the reason for their formation, their population, architectural, infrastructural, social, economic characteristics, and its problems through an analytical study. Then the outcomes of such phenomenon, with suggested solutions for it, for it is escalating continuously, especially regarding inhabitants' increasing numbers, housing, services & infrastructure, sanitation and environmental pollution. Eventually, it is important to plan and address this phenomenon, even though the solution will be an unsystematic solution for the critical need for houses.