Buckeye, AZ Accessory Structures: ADU Rules (2026)
ADU rules in Buckeye, AZ, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Max ADU size
- 75% of primary home's floor area
- ADU setback
- 5 ft rear and side
- Units per lot
- 1 attached + 1 detached
- Parking required
- None required for the ADU
- Utility meter
- Shared with home unless unsafe
Summary
Buckeye allows one attached and one detached accessory dwelling unit per single-family lot, capped at 75 percent of the main house's floor area, with a 5-foot rear and side setback and no parking requirement.
An accessory dwelling unit (ADU) shall be permitted as an accessory use subject to the following standards... the minimum rear and side setback from the property line for an ADU is five feet. Mobile homes, industrialized housing, recreational vehicles, travel trailers, and any other wheeled or transportable structure shall not be used as ADUs... The maximum size of an ADU is 75 percent of the gross floor area of the single family dwelling on the same lot... Parking for vehicles is not required for an ADU.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 22 Update 1).
Full Breakdown
The Development Code permits ADUs as an accessory use in any zoning district that allows the principal residential use, under Section 3.3.4.A. A single-family lot may have one attached ADU and one detached ADU; a duplex lot is limited to one ADU. Lots of one acre or more may add a second detached ADU if it is a deed-restricted affordable unit, verified at Building Permit. The ADU cannot exceed 75 percent of the primary home's gross floor area, gets a reduced 5-foot rear and side setback instead of the standard district setback, and needs no separate utility meter or off-street parking. Mobile homes, RVs, and travel trailers cannot be used as ADUs.
Violations & Fines
Building or expanding an ADU outside these standards is a Zoning Administrator enforcement matter: permits can be withheld or revoked, work stopped, and violators face a class one misdemeanor with fines up to $2,500 per violation (Development Code § 9.3.4.A).
Frequently Asked Questions
Do I need a separate utility meter for my Buckeye ADU?
Can I put an RV or mobile home in my backyard as an ADU in Buckeye?
Sources & Official References
Other rules in Buckeye
How Buckeye compares: Easiest Cities to Build an ADU·Compare Buckeye to another location·View the Arizona accessory structures overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
ADU Rules in Nearby Cities
How other cities in Maricopa County handle adu rules.