What is an ADU?
An ADU stands for "accessory dwelling unit" and is a small, self-contained living unit on the same property as a single-family home. It is sometimes called "granny flat," "in-law unit," or "secondary dwelling unit."
![Traditional California house with an ADU in the back of the property lot](/_next/image?url=%2Fimages%2Fca-adu.com-california-traditional-house-with-adu.jpg&w=1920&q=75)
An ADU can be a detached structure, such as a guest house or a converted garage, or a part of the main house, such as a basement apartment or a converted attic.
ADUs are often smaller than the primary unit and are usually intended as a rental unit, a home office, a guest house, or a home for an aging parent or adult child.