Chandler, AZ Accessory Structures: ADU Rules (2026)
ADU rules in Chandler, AZ, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- State Law
- HB 2720 (Jan 2025)
- Max ADUs
- 2 per lot (3 on 1+ acre)
- Size Limit
- 1,000 sq ft or 75% of main
- Setbacks
- 5 ft side/rear minimum
Summary
Arizona HB 2720 (effective January 2025) allows ADUs by right on single-family lots in Chandler. Up to 2 ADUs per lot (1 attached, 1 detached). Maximum 1,000 sq ft or 75% of main dwelling. Chandler adopted Ordinance 5113 for compliance.
35-2202.2 ACCESSORY DWELLING UNITS. (1) ACCESSORY DWELLING UNITS ARE PERMITTED ON ANY LOT OR PARCEL WHERE A SINGLE-FAMILY DWELLING IS THE PRINCIPAL USE, SUBJECT TO THE FOLLOWING: (A) A MAXIMUM OF ONE ATTACHED AND ONE DETACHED ACCESSORY DWELLING UNIT SHALL BE PERMITTED. AN ACCESSORY DWELLING UNIT SHALL NOT EXCEED SEVENTY-FIVE (75) PERCENT OF THE GROSS FLOOR AREA OF THE EXISTING SINGLE-FAMILY DWELLING OR ONE THOUSAND (1,000) SQUARE FEET, WHICHEVER IS LESS. (C) AN ACCESSORY DWELLING UNIT SHALL COMPLY WITH ALL LIMITATIONS ON BUILDING HEIGHT, INTENSITY OF LOT USE, AND FRONT YARD SETBACKS FOR THE ZONING DISTRICT IN WHICH IT IS LOCATED; EXCEPT REAR AND SIDE YARD SETBACKS SHALL BE NO LESS THAN FIVE (5) FEET. (E) ACCESSORY DWELLING UNITS SHALL BE SERVED BY THE SAME WATER, SEWER, AND ELECTRIC-UTILITY PROVIDERS AND METERS AS THE PRIMARY RESIDENCE. (G) AN ACCESSORY DWELLING UNIT SHALL HAVE A SEPARATE AND INDEPENDENT ENTRANCE FROM THE PRIMARY RESIDENCE.
Full Breakdown
Arizona HB 2720, effective January 1, 2025, mandates that cities over 75,000 population allow ADUs by right on single-family residential lots. Chandler adopted Ordinance 5113 to comply. Up to 2 ADUs per lot are permitted (one attached, one detached), with a third on lots over one acre. ADUs may not exceed 75% of the main dwelling's gross floor area or 1,000 square feet, whichever is less. On lots over 10,000 sq ft, the limit increases to 3,000 sq ft or 10% of lot area. Detached ADUs must maintain 5-foot side and rear setbacks. Accessory buildings must be located behind the front wall plane of the home. Maximum height is 15 feet.
Violations & Fines
Building without permit: stop-work order and fines. ADUs exceeding size limits: zoning violation requiring modification or removal.
Frequently Asked Questions
Can I build an ADU on my property in Chandler?
What are the size limits for an accessory dwelling unit in Chandler?
Sources & Official References
Other rules in Chandler
How Chandler compares: Easiest Cities to Build an ADU·Compare Chandler to another location·View the Arizona accessory structures overview
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ADU Rules in Nearby Cities
How other cities in Maricopa County handle adu rules.