In this report we aim to clarify collective form of housing units concerned with exterior spaces. It is one of the important subjects which decides the compositional characteristics of collective housing, that is how to make the spatial units and how to combine them. First, we defined the compositional units which is formed by articulated exterior space and houses surrounding it. Secondly, we analyzed the spatial relationships between exterior spaces and between compositional units. Then we found typological compositions and characteristic instance in collective housing. Through comparing those compositions, we found the structure of territory and the collective form of housing units defined by arrangement of exterior space.
