This Housing originally developed as a welfare facility for a railway company, has long fostered deep ties with the local community—hosting seasonal festivals and cherry blossom viewings on its grounds since the early Showa era. Due to the aging condition of the buildings, a redevelopment plan was initiated. This large-scale project involves the simultaneous development of two family dormitory buildings, a single-person dormitory, a daycare center, and a public park across a municipal road. To enable a comprehensive and integrated approach, the project utilizes the Integrated District Design System (Ichidanchi Sōgō Sekkei Seido), allowing for coordinated environmental planning that both enhances community interaction and minimizes the impact on surrounding residences. Due to the system’s flexibility in building placement, the new layout evokes the memory of the original site while reducing shadowing and visual impact on neighboring properties. The project also promotes public-private collaboration by extending the central pedestrian path—originally a narrow municipal road—into the company housing site. This space has been transformed into a public promenade that connects seamlessly with Ōta Ward’s “Sakura Promenade” initiative. In times of disaster, this promenade functions as a support station for people unable to return home, equipped with emergency storage and backup power, serving as a vital disaster preparedness hub for the community.