22 ADU Floor Plans That Make the Most of the Backyard

The 1,178-square-foot ADU replaced the existing garage’s 20-by-30 foot footprint. On the ground level, an open-plan, double-height living space is surrounded by sliding glass doors that open to a Japanese-style engawa deck. Upstairs, two bedrooms are connected by a bridge that overlooks the living room, and a rooftop deck creates additional space for entertaining.