Designing the relationship of collectivity and individuality A cooperative house with eleven dwelling units located in the suburb of western Tokyo. Firstly, skeleton plan was provided to the potential residents. Infill design was developed based on this skeleton frame. Under such scheme, the challenge was to develop the space dynamically through interactivity of the skeleton and infill design instead of simply adjusting the infill design into the skeleton frame. The goal of this project was to realize the space unique to resident?s lifestyle through design freedom maximizing the flexibility of skeleton frame and following design code has been proposed; Single house-like dwelling unit layout?provide independency for each household Floor level on demand?provide flexibility for internal space composition and privacy from neighboring units 12 square meters utility space?residents liberty to determine the usage Rooftop terrace formed as step form?different roof planting plans could be selected for each terrace.