Recently the concern with high quality rental house has been growing. However, some problems of defective rental house remain unsettled. Especially, the repair and maintenance cost are occurring at the crack repairing and external painting work. The purpose of this paper is to study on a survey with practicing professionals and a field research regarding to public rental house. All data was collected by the survey which was carried out to practicing professionals in 8 different major areas and direct field research from diagnosis group. From the result of the survey, we found out external painting deterioration is ongoing very fast. In contrast, the result from direct field research shows external painting deterioration is still in good condition.