Seattle is promoting these structures as a way to increase the supply of available housing. As such, you are encouraged to rent out your DADU on a long-term basis. Some homeowners choose, instead, to list them on a short-term rental service such as Airbnb, use them for family, or simply treat them as a spare wing of their home for visiting guests or personal use. A few homeowners have even downsized by moving into their DADU and then renting out their main home for extra income. With a DADU, the possibilities are almost endless.