An Accessory Dwelling Unit (ADU) is a second and complete living space. These small homes can provide additional housing and supplemental income to homeowners.

The ADU Model Plans Library is a resource to learn more about ADUs and plan for building an ADU in the future. The library contains pre-approved model Plans for detached ADUs that can be purchased from the designer to build on your property.

1. Browse the Library and pick your favorite design.
2. Complete background research to better understand if the chosen ADU is likely to fit on your property.
3. Contact the plan designer and pay the reuse/licensing fee.
4. The designer will prepare a site plan for your property and help select pre-approved customization options.
5. Apply for and receive an approved City of Flagstaff Building Permit for your property.
6. Choose your contractor/builder (this can be done earlier).
7. Construct your ADU.
8. Receive a Certificate of Occupancy from the City of Flagstaff for your ADU.
9. Enjoy the benefits of having your own backyard home!