Prefab

In this library, a Grant sleeper sofa by Mitchell Gold + Bob Williams is paired with a Cigar wall sconce by George Nelson.

The house is about 3,000 square feet with six bedrooms, four of them on the second floor, surrounding a stairway to the large open space below where cooking, dining, game-playing, and movie-watching take place.

In the kitchen, the cabinetry is walnut veneer with a weathered finish applied by cabinetmaker David Rogers. “The process involved sanding and rubbing in stain as well as adding a clear finish,” project architect Eero Puurunen says.

On the first floor, a gentle ramp ensures accessibility to common areas; all passageways are at least three feet wide. “Our goal was to accommodate a wheelchair without having the house feel designed differently at all,” says principal Lisa Gray. The builder on the project, Scotty McClelland, has known and worked closely with the families for many years.

The extended clan, which includes about two dozen members, collaborated with Gray Organschi Architecture to design an inclusive home for three generations.

One-inch-thick slate clads the fireplace in the living room, which opens to a terrace. The reclaimed coffee table is by Scott Chambers.

Beyond the second-floor landing, a garden roof filters rainwater and provides insulation.

Since the front door is located in the exterior wall, residents first enter a vast garden before reaching the gable roof house.