San Francisco, CA

Onsen Spa has transformed a former auto repair shop into an intimate Japanese spa and tea parlor in San Francisco's Tenderloin district. The design beautifully integrates warmth and tranquility into the industrial brick construction, softened by reclaimed redwood elements and retained skylights that fill the space with natural light.

The reconstructed facade features large window fenestration and a complementary entrance, inviting guests into a serene environment. The spa includes six private treatment rooms and a luxurious bathing area with a pool, showers, a sauna, and a steam room. At the front, the tea parlor and kitchen offer a welcoming space open to both spa guests and the public, providing a unique blend of relaxation and community.

This adaptive reuse project seamlessly combines industrial charm with Japanese-inspired aesthetics, making Onsen Spa a distinctive retreat in the heart of San Francisco.

Photography: Mark Wickens

ONSEN SPA

Indoor spa with wooden and brick decor, featuring a small pool, ferns hanging from the ceiling, changing rooms, and a refreshment counter.
Interior of a rustic, stylish cafe with wooden decor, hanging origami cranes, blue patterned jars, and a row of wooden stools at the bar. The space features a brick wall and shelves with various items.
Interior of massage room with a massage table, patterned chair, framed artwork, wooden cabinets, and brick wall.
Wooden sauna interior with brick and salt block wall, wooden benches, and warm lighting.
Interior of a steam room with white subway tiles and black diagonal accents.
Indoor spa room with a small pool, wooden walls, and ceiling plants. Brick walls enhance the rustic decor. Seating area with wooden chairs is visible.
Urban storefront with large windows, brick walls, and a wooden door.