Housing is one of the most basic human needs. However, many low income developing countries are troubled by the high rate urbanization between 2000 and 2030, the urban areas of the developing countries will absorb 95 percent of the world’s population growth. Excessive levels of urbanization in relation to economic growth and high levels of income inequality have resulted in large scale urban poverty and rapid expansion of unplanned urban settlements and slums, which are characterized by a lack of basic infrastructure and services, overcrowding and substandard housing conditions. Slums have serious adverse impacts on people and the society.