Accessory Structures in Flagstaff, AZ (2026)
4 verified accessory structures rules for Flagstaff, Arizona, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Flagstaff allows one accessory dwelling unit on nearly every single-family lot in every residential zone under Zoning Code Section 10-40.60.030. An ADU tops out at 75 percent of the primary home's floor area or 1,000 square feet, whichever is less, though any ADU up to 800 square feet is allowed regardless of the main house's size, with a 5-foot minimum setback.
Flagstaff ADU Zoning Rules
Some RestrictionsFlagstaff Zoning Code § 10-40.60.030
(i) An ADU structure may be located in the rear and interior side setbacks; provided, that the following are maintained: (i.a) Minimum rear setback abutting another lot or parcel: 5 feet. (i.b) Minimum interior side setback: 5 feet. ... (a) No more than one detached and one attached or interior ADU is permitted per lot or parcel developed with one Single-Family Dwelling. One additio...
ADU Owner Occupancy
In the City of Flagstaff, if a property with an accessory dwelling unit (ADU) rents that ADU as a vacation or short-term rental, the property owner must live on the property. The rule does not apply when the ADU is leased as long-term housing instead.
Flagstaff ADU Owner-Occupancy Rule
Some RestrictionsFlagstaff Zoning Code § 10-40.60.030, Table 10-40.60.030.A(8)(b)
(8) Required Occupancy ... (b) When a property contains an ADU, the owner of the property must reside on the property if any ADU is used as either a vacation or short-term rental.
ADU Rental Restrictions
In the City of Flagstaff, an accessory dwelling unit (ADU) may be rented out separately from the main house only as long-term housing, meaning a lease of 90 days or longer or a month-to-month tenancy. Short-term or vacation rental of the ADU triggers a separate owner-occupancy requirement.
Flagstaff ADU Rental Restrictions
Some RestrictionsFlagstaff Zoning Code § 10-40.60.030, Table 10-40.60.030.A(8)(a)
(8) Required Occupancy (a) The Single-Family Dwelling or any ADU located on the same Lot or Parcel may be separately leased as long-term rental housing. "Long-term housing" means rental use in which the tenant holds a lease of 90 days or longer or on a month-by-month basis.
Shed & Carport Rules
In the City of Flagstaff, a shed or other accessory building needs a permit under Division 10-20.40 and is capped at 24 feet tall inside the building envelope or 16 feet anywhere else under Table 10-40.60.020.B.7.e. Manufactured homes, trailers, buses and RVs may not serve as accessory structures, and in residential zones the structure must sit behind the primary house or in the rear or side yard.
Flagstaff Accessory Building And Shed Rules
Some RestrictionsFlagstaff Zoning Code § 10-40.60.020
B. Standards. ... 1. The property owner shall obtain permits and approvals for an accessory building or structure in accordance with Division 10-20.40: Permits and Approvals. ... ... 3. No manufactured home, mobile home, trailer, semi-trailer, bus, recreational vehicle, boxcar, or structure mounted on trailers/wheels shall be used as an accessory structure. ... ... c. The maximum height of an a...
Looking for Coconino County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Flagstaff city rules.
Accessory Structures in Coconino County →