The focus is on a design process for inheriting the cultural values of modern housing architecture. While the utilization of existing stock is an urgent issue in contemporary society, there has not been sufficient discussion of attempts to preserve and renovate buildings, especially those that are recognized as having historical and cultural values. This paper describes the repair and renovation of Migishi Atelier (original design: Iwao Yamawaki) and clarifies the specific issues and the design process in the preservation and utilization of modern housing architecture.