An Accessory Dwelling Unit is a second, self-contained living unit on a single-family lot. It has its own kitchen, bathroom, and entrance. It can sit attached to the main house, above a garage, in a finished basement, or as a stand-alone cottage in the backyard.
People use them for aging parents who want their own space, adult kids saving for a down payment, long-term guests, a serious home office, or rental income — and a lot of homeowners end up using them for all of the above over the years. The main thing that determines what's possible on your lot is local zoning, which varies by city across Utah. We've built ADUs in Heber, Wasatch County, and across the valley, and we know what most local codes will and won't let you do.