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The house cantilevers over the east-facing corner to create covered outdoor space, near the black Sarek table and chairs by Article.

Elaine spearheaded furniture selection (with Josh's input), including this pair of Vesper chairs by Burrow and a Odeon coffee table by Gus Modern.

After: The washroom and tub were upgraded to feel like a private spa, tying together the loft’s modern and collected aesthetic.

The home’s preserved staircase ascends alongside a double-height wall of windows to the second story.

The prefab design utilizes a pin foundation system that reduces the project’s carbon footprint by 77 percent, says Wittman.

Seattle architecture firm Wittman Estes used its new modular prefab system to built a prototype on Whidbey Island in Washington for a family that loves the outdoors.

The house is partially off-grid, with all water collected on site and all sewage treated and disposed of on site.

A built-in banquette with a custom table designed by Engelsman saves space. The bench has a cushion made by Caroline and the chairs are Vintage J.L. Moller Model #75 Dining Chairs. A partial wall now separates the adjacent den and TV room, to balance connection and separation.

The cabinets are IKEA frames with 'BASIS Natural Oak’ fronts by Reform.

La Base Studio has primarily been using modular construction for the past five years—as in this refuge in Bariloche, Argentina. In 2025, the studio developed a dry construction system based entirely on wood in collaboration with modular construction company Place, Forestal Guaraní, a key forestry and wood products company in northern Argentina.

“It shows how circular materials can slot seamlessly into contemporary design,” says McMahon of the decision to use sustainable K-Briq masonry units in the Subaru Cocoon Garden.

The home was designed by Rudolph Schindler, a close colleague and occasional rival of fellow Frank Lloyd Wright protege Richard Neutra.

In the kitchen, Carrara marble countertops are a luxe addition to the material palette.