抄録
This paper aims to investigate remodeling and rebuilding of detached houses in Senri New Town and to analyze their effect on the life span of houses. We made a questionnaire survey to the residents in detached houses about the alteration of their houses, and the type of their houses and the family types. The results are summarized as follows : 1) About 40% houses were rebuilt, within 30 years after their completion. 2) By far the most popular alteration is extension, followed by renewal of the exterior finish 3) The longer the houses survive, the more times they tend to be remodeled for one year.