ADU Permits: Glendale vs Peoria
How do adu permits rules compare between Glendale, AZ and Peoria, AZ?
Glendale and Peoria have similar restriction levels.
Glendale, AZ
Maricopa County
Glendale permits accessory dwelling units by-right under Arizona Revised Statutes section 9-461.18, enacted by HB 2720 in 2024 and effective for cities over 75,000 population on or before January 1, 2025. Glendale (population approximately 250,000) is subject to the mandate. Glendale City Council adopted ADU amendments to the Uniform Development Code (Chapter 35) on December 10, 2024. Single-family lots may have one detached and one attached ADU; lots over one acre may add a third.
View full Glendale rules →Peoria, AZ
Maricopa County
Peoria permits accessory dwelling units (often locally called casitas) by-right under Arizona Revised Statutes section 9-461.18, enacted by HB 2720 in 2024 and effective for cities over 75,000 population on or before January 1, 2025. Peoria (population approximately 190,000) is subject to the mandate. The Peoria Zoning Ordinance (PZO) Article 14-2 (Residential Districts) was amended to comply. Single-family lots may have one detached and one attached ADU; lots over one acre may add a third detached unit.
View full Peoria rules →Key Facts Comparison
| Fact | Glendale | Peoria |
|---|---|---|
| State Mandate | Ariz. Rev. Stat. 9-461.18 (HB 2720) | Ariz. Rev. Stat. 9-461.18 (HB 2720) |
| City Ordinance Adopted | Dec 10, 2024 (Ch. 35 UDC) | - |
| Units Allowed | 1 detached + 1 attached (3 if 1+ acre) | 1 detached + 1 attached (3 if 1+ acre) |
| Maximum Size | 75% of primary or 1,000 sq ft | 75% of primary or 1,000 sq ft |
| Separate Water Meter | Required (Glendale rule) | - |
| Building Code | 2024 IRC / IFGC as adopted | - |
| City Reference | - | Peoria Zoning Ordinance Article 14-2 |
| Permit Authority | - | Peoria Development and Engineering |
| By-Right Standard | - | Yes on single-family lots |
Highlighted rows indicate differences between cities.
Glendale FAQ
Can I build an ADU in Glendale by-right?
Yes. Under Arizona HB 2720 (Ariz. Rev. Stat. 9-461.18) and Glendale's December 10, 2024 amendments to the Uniform Development Code (Chapter 35), Glendale must allow one detached and one attached ADU by-right on every single-family lot. Lots over one acre may add a third detached unit. Building, plumbing, electrical, and fuel-gas permits through Glendale Building Safety are still required.
Does my Glendale ADU need a separate water meter?
Yes. Glendale requires all accessory dwelling units to have separate utility meters including a separate city water meter, which requires a new water tap to the city water main in the street or right-of-way. The ADU shares the primary address with a Unit 1 and Unit 2 suffix rather than receiving a new address.
Peoria FAQ
Can I build a casita ADU in Peoria by-right?
Yes. Under Arizona HB 2720 (Ariz. Rev. Stat. 9-461.18), Peoria must allow one detached and one attached ADU by-right on every single-family lot. Lots over one acre may add a third detached unit. Building, plumbing, electrical, and fuel-gas permits through Peoria Development and Engineering are still required.
How big can my Peoria ADU be?
Under ARS 9-461.18, your ADU may not exceed 75% of the gross floor area of the primary dwelling or 1,000 square feet, whichever is less. Setback, height, and lot-coverage standards from Peoria's residential zoning district still apply to the structure itself.
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