The study focuses on three-story townhouses to clarify their condition of non-residential use. We interviewed four main townhouse developers and researched three typical development sites. The main result are: 1) change from residence to non-residential use is done by each residents, 2) the business types are divided into two-broad area customers oriented and neighborhood customers oriented. 3) the attractiveness for residents are low price, good location, good environment and flexible use. In the other hand, the three-story townhouses varying with time may run into bad condition because of insufficient maintenance and lack of appropriate management as housing area.
