This paper clarifies the method of restoration of cultural properties in a historical built-up area in a small town in France by OPAH (Operation Programme d'Amelioration de 1'Habitat). (1) Compare to the urban renewal, OPAH can treats the small town in rural area where cultural properties are conserved. (2) In OPAH, the research using a questionnaire is conducted to evaluate the state of the structure of houses and the equipments inside houses. (3) The spatial structure of streets is examined by analysing the hight, the colors and the style of each house, then recommendations of the restoration are presented.