This project was to build a house as necessary with around 150 sq. m. or so on a spacious site sized more than one thousand sq. m. In contemporary, the typical organization of rooms designs that it resembles the modern social hierarchy like a large circle including small subsets in a top-down sequence, from “society” through “family” to “individuals.” Unlike this, our Pocheon project adopted the organization of rooms attached to a common corridor. It aims at an open social structure in which various lifestyles can be organized in a house according to the residents’ choice of rooms.