According to a Seattle Times report published earlier this year, there were more accessory dwelling units (ADUs) built in 2022 than detached single-family homes. That was the first time in Seattle's history that ADUs outpaced single-home construction, underscoring the rising popularity of "granny flats" and other accessory dwelling units. The surge in ADU construction in Seattle partly stems from regulatory overhaul. In short, the city has made getting accessory dwelling units approved easier and faster to help ease the ongoing housing shortage.