In the near future,the necessity of the housing based on 'Individualization' becomes more and more greater. The purpose of this paper is to clarify the capacity of the skeleton of the multi-story housing constructed by the Osaka Prefectural Housing Supply Corporation during the mass-housing from the view point of 'Individualization'. 73 Skeletons were categorized by the position of the utility and the positon of the balcony.In this paper,the capacity of of the skeleton was clarified by changing the spatial-structure in every categories from the view point of 'Individualization'.