Increasing of double-income, non-blood and single or couple family has revealed the limit of the nLDK housing for nuclear family. In this paper, spatial organization model for future family is proposed and based on the model works of houses are analyzed. We hypothesized that family functions are substituted by the habitation network which builds relationship not only between individuals other than blood relatives, but also between individuals and regional society are substitute for family function. The notion of the Open Common is proposed as a domain in which a resident interact with other people who constitute this habitation network. Furthermore, a model plan and existing houses of the free adaptation type are presented and analyzed.
