Spray‑applied polyurethane foam was applied to exterior wall surfaces and secondary glazing was installed at openings to improve thermal insulation, airtightness, and sound insulation.
The original tatami room was dismantled; performance upgrades including improved insulation, seismic reinforcement, underfloor heating and a built-in air-conditioning unit were implemented.
Overall view of the living room. The original structure was strengthened while a western-style room and two Japanese rooms were combined into a large single space.