At the outset of the design process, says Knight, "The home needed to maximize indoor/outdoor spaces, have low-maintenance materials, preserve open space for their dogs to run, and be cost-effective with an efficient layout." His solution was a "structurally simple box" that adjoins the existing home. Stacking the larger volume atop the bottom creates protected outdoor spaces that flow easily with the interior, and are accessed by large sliding glass doors, fabricated by Deters.