소단위 정비사업을 통한 도심내 임대주택 확보 방안 연구 - 관리처분방식과 민간토지임차방식을 중심으로

This study evaluated a small-unit improvement project, through which small-sized apartment houses are constructed after demolishing existing deteriorated houses, as a method for increasing public rental housing in urban areas. Four public rental housing supply models were classified by business method (method of securing land), main participant, and housing types. Cost and income were calculated based on the construction design plans for the study area, and cash flow was analyzed through four scenarios that applied standard information, such as the ratio of land price increases, the reflection ratio of current rent prices, the rate of rent increase, and the national housing fund interest rate. Results of the analysis indicated that the management and disposal method and the private land lease method are both effective in reducing land purchase costs at the outset of the project. In particular, a quasi-public rental housing model based on the private land lease method exhibited the highest NPV and lowest marginal burden charges to original residents, and was thus verified as an effective model. Furthermore, it was found that the reflection ratio of current rent prices is the most significant variable affecting project feasibility. However, because increases in the reflection ratio of current rent prices can place a burden on tenants, adjusting the interest rate regulation was determined to be more appropriate.