Kyōbate, Nara City. This project involved the rehabilitation of a circa-25-year-old existing building purchased by the client, converting it into a residential facility. The building was originally constructed as a confectionery factory and warehouse and, after a series of incremental, patchwork renovations, had been used as offices and employee accommodation. As a result, the passenger/freight elevator was unnecessarily large and the internal partitions were in a hazardous condition from the perspective of fire protection and means of egress, making them unsuitable for reuse. After verifying that the project could satisfy current provisions of the Building Standards Act, Fire Service Act and the Inns and Hotels Act while remaining commercially viable, the scheme was reconfigured as a mixed facility combining a female-only share house for single occupants and a guest house. By retaining the existing structural frame we avoided retroactive structural recalculations associated with the change of use. The oversized elevator was removed and replaced with a domestic elevator designed to comply with vertical-shaft compartmentation, and the guest-house and share-house circulation paths were separated but planned efficiently. By installing high-performance insulation, thermally efficient resin window frames and a BEMS, the project obtained a ZEB (Net Zero Energy Building) subsidy from SII (Environmental Innovation Initiative), improving residential performance while substantially reducing operational costs.
Location | Nara City
Use | Dormitory (share house) & Inn (guest house)
Structure / Scale | Steel frame, 4 floors
Site area | 68 tsubo [226 m2]
Area used for unit-cost calculation | 150 tsubo [495 m2]
Design & supervision | Yoshihiro Yamamoto [YYAA]
Structural design collaboration | [Yamaguchi Architectural Design Office]
Construction | [Kameyasu Construction]
Share-house leasing | [Hitsuji Real Estate]
Net Zero Energy Building demonstration project | [SII (Environmental Innovation Initiative)]