Designing houses with good natural ventilation in urban areas is challenging, because the surroundings have a Designing houses with good natural ventilation in urban areas is challenging, because the surroundings have a significant impact on the wind pattern and indoor air velocity. Hn the downtown area, air pollution and disturbing noises discourage the use of natural ventilation in residential buildings. Therefore, our investigation focuses on suburban residential areas. These suburban houses have a larger potential for taking advantage of the prevailing winds, because of the cleaner and less dense neighborhood environments. in fact, houses in the suburbs are perceived as the norm in modern Thailand.