The purpose of this study was to analyze the effects of development regulations on change of housing type in single-detached house area. The change of housing type ratio from 1970 to 2009 was analyzed to inspect general aspects of single-detached house area in seoul. In addition to, the housing supply amount of single-detached house, multiplefamily-house and multihousehold-house is analyzed from 1985 to 2004. Also, microscopic analysis was carried out to verify the the effects of development regulations on change of housing type. The case study site was 366 block in Hwagok land readjustment project area. The results of this study were as follows; Firstly, it was the "destruction of single-detached houses" and "spread of the apartment" that the most important aspect in the change of residential area in Seoul for the 40 years. Secondly, the change of housing type in Hwagok 366 block was affected by the strengthen or mitigation of development regulations which introduced by controlling the housing supply. Thirdly, this phenomenon was attributed to the housing policy and residence management which were obsessed with a particular housing type and supply amount. Thus, it can be said that regulations on residence development in Seoul are linked with controlling housing type and amount. Eventually, it was very difficulty in application of perspectives of residential environment and management of landscape change.