The aim of this study is to clarify the rhetoric on composition of contemporary houses in terms of relation between windows. The characteristic of windows is the repetition of those in a house. First, the windows are extracted as a set in the house. Second, the relation between windows are analyzed in two levels of differentiation : sorts (shape / size / depth) and position (center / corner) of windows. Finally 12 types are clarified through the combination of these differences. Comparing every type and generation, we found that there are more types that could be regarded as a rhetoric of ‘contrast’ in 1970's-1980's and more types as a rhetoric of ‘similarity’ and ‘equality’ after 1990's.
