Accessory Structures in Gilbert, AZ (2026)
9 verified accessory structures rules for Gilbert, Arizona, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Gilbert permits ADUs up to 1,000 sq ft or 75% of the primary dwelling. State law HB 2720 requires a minimum 5-foot setback. ADU parking must be behind the main building and screened from the street.
Gilbert ADU and Casita Regulations
Some RestrictionsADU Permits
Gilbert processes ADU permits through Development Services. Arizona HB 2720 (signed May 2024, effective January 1, 2025) preempts most local ADU restrictions in cities over 75,000 residents and codifies ADU rules at ARS 9-461.18. Gilbert (population over 280,000) must allow at least one attached and one detached ADU per single-family lot by right.
Gilbert ADU Permits Under HB 2720
Some RestrictionsADU Impact Fees
Gilbert charges development impact fees on new ADUs under ARS 9-463.05, but HB 2720 caps ADU impact fees in cities over 75,000 at no more than 50 percent of single-family detached rates in each category. Water and sewer capacity fees apply where a new meter is installed; shared utilities avoid those charges.
Gilbert ADU Impact Fees
Few RestrictionsADU Owner Occupancy
Gilbert previously required owner-occupancy as a condition of casita approval, but Arizona HB 2720 (ARS 9-461.18) preempts owner-occupancy requirements in cities over 75,000 population. Gilbert may no longer condition ADU permits on the owner residing on-site. HOA CC&Rs may still impose restrictions, subject to limits under ARS 33-1817.
Gilbert ADU Owner Occupancy
Few RestrictionsADU Rental Restrictions
Gilbert permits long-term ADU rentals without registration or licensing. HB 2720 prohibits Gilbert from imposing minimum-lease terms longer than 30 days or banning ADU rentals. Short-term ADU rentals (under 30 days) require Gilbert vacation rental registration under ARS 9-500.39 and remittance of Transaction Privilege Tax.
Gilbert ADU Rental Restrictions
Few RestrictionsShed Rules
Gilbert requires building permits for structures 200 sq ft or larger, or any structure with utilities. Smaller structures without utilities are permit-exempt. Buildings must meet prescribed setbacks per the Land Development Code.
Gilbert Shed & Accessory Building Rules
Some RestrictionsGarage Conversions
Garage conversions to ADUs are permitted under HB 2720 with a building permit. Converted spaces must meet residential building codes. Gilbert previously required compatible design, which HB 2720 eliminated.
Gilbert Garage Conversion Rules
Some RestrictionsCarport Rules
Carport construction in Gilbert requires a building permit and must meet zoning setback and height requirements. Carports are classified as accessory structures under the Land Development Code.
Gilbert Carport Permit and Building Requirements
Some RestrictionsTiny Homes
Gilbert allows tiny homes as ADUs on permanent foundations, limited to 1,000 sq ft or 75% of the primary dwelling. Tiny homes on wheels are classified as RVs and cannot be permanent residences.
Gilbert Tiny Home and Casita Standards
Some RestrictionsLooking for Maricopa County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Gilbert city rules.
Accessory Structures in Maricopa County →