This study aims to investigate the construction trend of detached houses and the actual condition of the habitation in three densely built-up areas in Osaka prefecture. Construction of new detached houses is expected to cause the improvement of an aging problem in these areas, because the householders of such new houses are comparatively younger than that of existing old houses. Because of the resident's intention of settlement, it is important to form the relationship between new households and the neighborhood. However, it needs to examine qualities of these houses with narrow site and 3 stories for residents to continue to live in. In terms of comparison of three areas, there are various characteristics in both construction of houses and the actual habitation. It is required the improvement of residential environment is considered with characteristics of each district.
