In Kanagawa Prefecture, there are many residential estates consisting of detached and owned houses. They were mainly developed in the late 1960s. This research selects 68 of them, and compares their age structures in 1975. The result shows that there is a significant difference in age structure in 1975 although these estates were developed almost simultaneously. In this research, these 68 estates were classified into 4 types in terms of age structure by 5-year age group through cluster analysis. These 4 types are primarily different in the age of household head, which indicates Typel as the youngest group while Type4 as the oldest one. In addition, the analysis of variance reveals that these 4 groups are closely related to the residents, attribute and the location of estates. In short, the higher the social status of resident is, the higher the age of resident would be. Regarding the recent change in each type, there is little difference between them, because their residents do not tend to move as much as those living in collective houses. Consequently, Type4 shows the highest ratio of elderly people and the oldest average age in 2000 as in 1975.
