The traditional houses in China have significant features in each region. These features are due to the regional difference in the climate, culture, economy, society and so on. Based on these differences, various relationships between interior space and external environment can be found, for instance lattice windows to create ambiguous space and intermediate region used as a living room to connect courtyard and private room. In this study, by using the concept of "interior/exterior" to comprehensively capture the internal/external space and barrier including intermediate region, the differences and commonalities among Chinese traditional houses in different regions are revealed.
