House of S II is the studio's gallery and showroom, set inside a Ridgewood rowhouse that Studio S II redesigned from the architecture through to the furnishings. Every room is a working room, so every piece is seen in use. Studio S II's furniture and lighting share the space with family antiques and pieces by designers from the studio's community. The gallery opened on February 28, 2025, with more than 55 designers and artists, and its installation rotates throughout the year.