Abstract   The purpose of this paper is to examine the characteristics and problems of social housing estates in South Korea, and to explore sustainable community development issues. In order to examine the social housing situation, a survey of the three social housing communities in Seoul was conducted. The survey evidence demonstrates that there is a growing stigma against the poor and social exclusion. This kind of social bias is likely to escalate the construction of social housing estates, which the poor concentrates in. Residents recognized that mixing public and private housing would be an issue and problematic. Public housing was thought to have a negative impact on the neighborhood. It is important to examine why these kinds of social problems arise. Applying the concept of social sustainability to low-income communities in urban Korea requires mobilizing residents and their governments to strengthen all forms of community capital.