An overview of the Korean urban context and the housing problems regarding displacement are discussed first. Then theoretical framework and types of affordable housing design methodologies are examined and based on the literature review, feasible affordable housing design methodologies are selected for the urban context of Seoul. Lastly, from an analysis of the case studies, viable architectural approaches for affordable housing design strategies are suggested. In the mid-1990s, Korean homeowners began to organize “Jaegaebaljohap” (regional redevelopment unions), controlled by large developers whose goal is to maximize profit, to improve their living conditions. As a result, the area of redevelopment is filled with high-rise luxury condominium housing. Jaegaebaljohap provides a ‘right of purchase,’ representing the market value of the existing homes that can be used for buying new homes, for the residents.