Carefully sited in front of a 1920s Seattle bungalow, this compact, butterfly-roofed dwelling flips the typical relationship between house and DADU (Detached Accessory Dwelling Unit). Instead of an ancillary, backyard structure, House O is conceived as a foreground to the original home, creating a new courtyard garden between the two structures. Conceived and designed in collaboration with the client, architectural historian Ken Tadashi Oshima, the design is informed by the Japanese spatial concept of oku, which choreographs indoor/outdoor space through a sequence of hide-and-reveal to create spatial depth. The new 1,000-square-foot DADU shares a co-equal relationship with the existing home, proposing a series of spaces and framed views that meander from the entrance, through the small residence, out to the courtyard and a connecting bridge, to the existing house and borrowed scenery of the territorial tgview beyond.
The siting strategy, informed by extended discussions between Hutchison and Oshima on the relationship between the two structures and the metabolic conception of Japanese gardens, is highlighted by a connective outdoor wooden bridgeway. The existing trees and mature landscape shape the design: House O is situated behind a mature apple tree whose shady canopy serves as an extension of the architectural entry canopy and keeps the house cool in summer but provides ample sunlight in winter, and a tall cypress tree that helps delineate the courtyard as a dramatic outdoor room between the two structures.
Just as the organic notion of metabolism integrates diverse elements over time, the design of House O considers many potential future functions. Besides additional living space, including a library and music area, House O can also host visiting or live-in family members, transforming the home into a multigenerational living complex. The design is also executed in such a way that future owners could connect the two structures, or use the DADU as a separate rental property.
Inside, House O’s L-shaped scheme contains an open living/dining/kitchen area, with an overhead loft functioning as a music area or a quiet place for study. Below the loft is the entry, with a custom bench on which to remove shoes, and a small private office. A custom full-height bookshelf in the living room provides for an ever-growing library, and transitions into bench seating at the dining table. A gently curved ceiling unites the interior spaces, softening the dramatic angles of each roof slope and modulating ever-changing natural light.