Major of the research is to clarify the process of formation and transformation of Tai house in Mekong Basin, especially in Laos and northeast region (Isan) of Thailand. The purpose of this research is to clarify the spatial formation and transformation of Tai-Lao house at Ban Paksy village, Luangprabang in Laos. Base on the previous research of Luangprabang by Sophie Clement-Charpentier and Pierre Clement, this research tries to analyze the spatial characteristics of houses at Ban Paksy Village in Luangprabang by the field survey. It is one of the main issues of the research to explain the space order of site plan and house plan that the inhabitants has succeeded.
This paper classifies the house plans into several types and describes the basic type and its variation. The authors suggest that Tai-Lao dwelling and the way of life has been gradually changed from the past and symbolism of spaces has weakened according to the change in the way of behavior and the way of recognizing space by the people.