Call them ADUs, ‘granny flats,’ or in-law suites, but these small-scale homes could be the key to greater housing density and affordability. A newly built accessory dwelling unit in Los Angeles. Alisha Jucevic/The Washington Post via Getty Images To many people, the image of a nuclear family in a stand-alone house with a green lawn and white picket fence still represents a fulfillment of the American dream.Read Full Story