ADU Impact Fees: Chandler vs Mesa
How do adu impact fees rules compare between Chandler, AZ and Mesa, AZ?
Chandler and Mesa have similar restriction levels.
Chandler, AZ
Maricopa County
Chandler does not impose dedicated ADU impact fees. Ariz. Rev. Stat. section 9-461.18 limits the fees cities may charge on accessory dwelling units to ensure compliance with the state by-right mandate. Standard building permit and plan review fees through Chandler Development Services apply, calculated on construction valuation. Water and sewer development fees may apply only when new utility connections are installed.
View full Chandler rules →Mesa, AZ
Maricopa County
Mesa charges development impact fees under Arizona Revised Statutes Section 9-463.05 for water, wastewater, parks, and public safety. HB 2720 requires that ADU impact fees be proportional to the ADU's service demand, not the full single-family rate. Mesa Utilities capacity fees apply when a new water meter is installed for an ADU.
View full Mesa rules →Key Facts Comparison
| Fact | Chandler | Mesa |
|---|---|---|
| Dedicated ADU Impact Fee | None in Chandler | - |
| State Cap | ARS 9-461.18 limits excessive ADU fees | - |
| Permit Fee Basis | Construction valuation | - |
| Utility Fees | Only if new connections required | - |
| Transportation Impact Fee | Not applied to ADUs | - |
| Park Impact Fee | Not applied to ADUs | - |
| Fee Authority | - | ARS §9-463.05 |
| HB 2720 | - | Proportional ADU fees required |
| Water Meter | - | Capacity fee if new meter |
| Permit Fee | - | $500-$2,000 typical |
Highlighted rows indicate differences between cities.
Chandler FAQ
Does Chandler charge an ADU impact fee?
No. Chandler does not impose a dedicated ADU impact fee. You pay standard building, plumbing, mechanical, and electrical permit fees through Development Services based on construction valuation. Water and sewer development fees apply only if a new meter or service connection is installed.
Can Chandler impose excessive ADU fees?
No. Arizona Revised Statutes section 9-461.18 limits the fees Chandler may impose on accessory dwelling units to prevent the state by-right mandate from being undermined. Fees must reasonably reflect the actual cost of services provided and cannot effectively prohibit ADU construction.
Mesa FAQ
How much are impact fees for a Mesa ADU?
Mesa impact fees vary by area and ADU size. Under HB 2720, fees must be proportional to the ADU's service demand, not the full single-family rate. Request a fee estimate from Mesa Development Services before submitting permits.
Do I need a separate water meter for my Mesa ADU?
Not required. Sharing the primary dwelling's water meter avoids Mesa Utilities capacity fees. A separate meter is optional but triggers a new meter installation fee plus capacity charges. Most homeowners share the meter unless they plan to rent the ADU separately.
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