Because most of permanent rental housings in Korea were constructed more than 20 years ago, they are actually in need of renovation. Also high proportion of elderly people are living in permanent rental housing who are fragile in the social, financial, and physical aspect. It is inconvenient and dangerous for them to continuously live in such a deteriorated environment. But they want to live as long as possible in their old residences until they are severely ill or they die. Introducing communal living home for the aged into these existing permanent rental housings will be a way to provide Aging in Place to these seniors. This study has surveyed related laws, previous studies and advanced cases in foreign countries to propose a type of communal living homes for the aged in permanent rental housings. This study has suggested the communal living home for the aged with a concrete plan on roof top and the first floor of a representative permanent rental housing block. From this study, we tries to relieve 3 major problems of seniors such as alienation, poverty, and disease. This can be an option for realizing Aging in Place by residing seniors within the existing complex and forming sustainable community.