"Accessory dwelling units (ADUs) are good for people and communities. An inside look at 25 charming, ultra-functional, extra living spaces will inspire you to build one of your own! An Accessory Dwelling Unit (ADU) is a smaller housing unit built on the same lot as a primary dwelling (also known as Additional or Auxiliary Dwelling Units) -- think granny flat, in-law unit, laneway house). It has an arrangement for sleeping, cooking, and lavatory. An...