A 1,600-square-foot in-law unit in Sonoma, California, has two bedrooms and two baths for its 87-year-old resident, whose daughter lives nearby. "The layout is well-suited for older clients," says Jared Levy of Connect:Homes. "It feels generous and open." Though the daughter didn’t want all-glass walls, natural light and airflow were key. Levy and fellow cofounder Gordon Stott used an LED system to offset light from windows and doors. Says Stott, "It’s about 150 watts to light the whole house."