The purposes of this study are clarifying the meaning of the open and utilization and the possibility for maintenance of the privately-owned houses as tangible cultural property. The actual situations of the maintenance and the open and utilization of the houses were grasped by the questionnaire to all privately owners. By the result of analysis, it was cleared as follows. 1)The open and utilization stimulate repairs of houses at the non-living cases. 2)The open and utilization cause owners' will to maintain at the living cases. 3)The information sharing for operation brings the possibility for dispersion of the owners' burdens. © 2019 Architectural Institute of Japan. All rights reserved.