This project involves the renovation of a 90-year-old, 300-tsubo residence in Zaimokuza, Kamakura—one of the few remaining sites that still evoke the character of a Showa-era villa district. Through decades of incremental modification, a stark contrast had emerged along the FL +2.5m line: below it, earthen walls layered with traces of renovation; above it, a symbolic timber truss left virtually untouched for nearly a century. Recognizing this vertical dichotomy, the design team deliberately restricted the scope of intervention to areas below the 2.5-meter line, redefining all structural walls within that range as semi-load-bearing elements. This strategy serves to sustain and reveal the architectural history inscribed in the house, establishing a narrative continuity through spatial restraint. Following the renovation, the house was converted into a whole-unit accommodation under Japan’s Private Lodging Business Act. Through this regulatory transformation, the project enacts an architectural return—after ninety years—to a “villa”-like use, reframing its identity via both spatial and legal means.