Accessory Structures in Arizona (2026)

Arizona's HB 2720 (2024), codified at A.R.S. 9-461.18, requires municipalities over 75,000 population to permit…

One attached ADU plus one detached ADU are permitted by right on any single-family lot under an acre in Avondale; lots…

Buckeye allows one attached and one detached accessory dwelling unit per single-family lot, capped at 75 percent of the…

Arizona HB 2720 (effective January 2025) allows ADUs by right on single-family lots in Chandler. Up to 2 ADUs per lot…

Coconino County allows one attached and one detached accessory dwelling per lot, capping the standard unit at 600…

Gilbert's LDC caps single-family lots at one detached and one attached accessory dwelling unit, with a second detached…

Glendale allows one attached and one detached accessory dwelling unit per single-family lot under Section 35.3.204(A)…

Goodyear allows one attached and one detached Accessory Dwelling Unit per single-family lot, plus a second detached…

Maricopa's zoning code permits a guest quarters (ADU) by right only on single-unit lots in RS districts, bars separate…

Unincorporated Maricopa County allows one attached and one detached accessory dwelling unit by right on any…

Mesa allows one attached ADU and one detached ADU per lot in any Agricultural, Residential, Commercial and Mixed Use…

Peoria allows one attached and one detached accessory dwelling unit on a standard single-family lot under Section…

Unincorporated Pima County allows one attached and one detached ADU per residential lot, with strict setback and size…

Unincorporated Pinal County allows one attached and one detached ADU on lots under an acre, plus a second detached unit…

Queen Creek allows one attached or one detached accessory dwelling unit per single-family lot under Zoning Ordinance…

Sahuarita limits homeowners to one accessory dwelling unit per lot under Town Code Section 18.12.030(C), capping the…

Scottsdale allows up to two Accessory Dwelling Units on lots under an acre and three, including one…

Sedona allows one accessory dwelling unit per lot, and a detached ADU must match the setback, lot coverage and height…

Surprise allows one attached and one detached accessory dwelling unit on most single-family lots under Article XI…

Tempe allows one attached and one detached ADU on any residential lot under an acre, capped at 1,000 square feet of…

Tucson's UDC allows up to two accessory dwelling units per single-family parcel, one on a duplex lot, without counting…

Accessory dwelling units are a permitted use on any unincorporated Yavapai County lot zoned for a single-family home…

Yuma allows one accessory dwelling unit behind a single-family home in residential zones, or two on lots of 10,000…

Under Mohave County Ordinance 2025-06, any property that allows a single-family home may add one attached and one…

Phoenix permits up to two accessory dwelling units (one attached, one detached) on a single-family detached lot, with a…

An ADU built after Yavapai County's 2024 zoning update can't be run as an unhosted vacation rental. Section…

Phoenix requires a notarized owner-occupancy attestation before renting a short-term rental in an accessory dwelling…

If a Pima County property in the unincorporated area has an accessory dwelling unit, the owner must live there to…

Sedona will not let an investor own an accessory dwelling unit separately from the main house. SLDC Section 3.4.D(3)(d)…

Maricopa County does not require an owner to live on the property when adding an accessory dwelling unit. ADUs may be…

The Town of Queen Creek does not require the property owner or a family member to live in either the main house or the…

An accessory dwelling unit that gets its certificate of occupancy on or after September 14, 2024 cannot be rented out…

A third ADU on a Tempe lot of an acre or more is allowed only if one of the three units is deed-restricted to renters…

An accessory dwelling unit in unincorporated Maricopa County can be rented long-term with no family or employment tie…

Queen Creek lets a lot gain a second detached ADU only once the Town's certified population passes 75,000, and only if…

Scottsdale bars selling an ADU separately from the main house and requires a recorded deed restriction before a…

Yavapai County lets an ADU, or the main house next to it, be leased out as long-term rental housing, but Section…

Gilbert's Land Development Code states directly that an accessory dwelling unit may be rented or leased separately from…

In unincorporated Pima County, the zoning code lets an accessory dwelling unit be rented short-term or long-term, and…

Avondale's zoning ordinance bars detached sheds and other accessory buildings from any front yard and caps their height…

Buckeye lets a backyard shed or accessory building sit as close as 3 feet from the property line, growing to 5 feet…

A detached one-story shed in Chandler skips a building permit only if it stays at or under 120 square feet and 7 feet…

A detached shed or accessory structure in unincorporated Coconino County must meet the same setbacks as the main house…

In Gilbert's SF-43 single-family district, the Land Development Code lets you build an unlimited number of detached…

Glendale's Unified Development Code sets exact size, height and setback limits for sheds and other accessory buildings…

Goodyear requires a permit for any accessory building or shed that will be lived in, attached to the house, larger than…

A detached one-story shed in Maricopa skips a building permit only if it's 200 square feet or smaller, no taller than 8…

In unincorporated Maricopa County, a detached carport must sit at least three feet from any side or rear lot line and…

Mesa exempts small detached accessory structures, tool sheds, storage sheds, playhouses, from the building permit…

Peoria sizes and sets back accessory buildings on a sliding scale in Section 21-315.C: sheds under eight feet tall and…

In CR-1 single-residence zoning covering unincorporated Pima County, sheds and accessory buildings max out at 1,500 sq…

In the GR General Rural zone, a detached shed or accessory building can cover no more than one-third of your rear and…

Queen Creek's Zoning Ordinance sets height, setback and coverage limits for detached accessory buildings like sheds…

Sahuarita sets separate dimensional standards for detached accessory buildings, such as sheds and workshops, in STC §…

Scottsdale limits backyard sheds and other accessory buildings to residential lots where the main house is already…

Sedona limits any accessory building, including sheds and detached garages, to 50 percent of the primary structure's…

Sheds and other accessory structures in Surprise must sit on the same lot as the main house, keep at least 5 feet of…

Tempe draws the line between a permit-free accessory structure and a regulated accessory building at 200 square feet or…

Tucson exempts only tiny sheds, five feet tall and ten square feet or less, from zoning review; anything bigger is an…

Unincorporated Yavapai County waives a building permit for a detached, non-habitable storage shed as long as it stays…

Yuma treats storage sheds as accessory structures under City Code § 154-15.15. Sheds up to 200 square feet and under…

Mohave County exempts a one-story detached shed of 300 square feet or less with no utilities from a building permit…

In Phoenix, one-story detached tool and storage sheds, playhouses and similar uses do not require a building permit if…

Chandler allows one attached and one detached accessory dwelling unit by right on any lot where a single-family…

Mesa lets homeowners convert an existing detached garage, carport, or accessory structure into an ADU without adding…

Phoenix allows converting an existing garage or carport into an Accessory Dwelling Unit, but the conversion must…

Converting an existing garage or other building into a Scottsdale Accessory Dwelling Unit requires meeting the full ADU…

Under ARS 9-461.18, every Arizona municipality with more than 75,000 residents must permit at least one attached and…

Sedona's zoning code will not let a park model or tiny home on wheels count as an accessory dwelling unit. SLDC Section…

Peoria adopted International Residential Code Appendix Q, which sets simplified construction standards for tiny houses…

Sahuarita permits stick-built tiny homes in any residential zone under Town Code Section 18.12.030(W), while a tiny…

Tempe's Zoning and Development Code lets homeowners build a tiny home as an accessory dwelling unit under Section…

In unincorporated Yavapai County, a small detached tiny home is regulated as an accessory dwelling unit (ADU) under…