Ariz. Rev. Stat. section 9-461.18 prohibits Glendale from imposing street impact fees on accessory dwelling units and limits other fees that could undermine the state by-right mandate. Standard building permit and plan review fees apply, scaled to construction valuation. Water and sewer development fees apply because Glendale requires a separate water meter and tap for every ADU, generating new connection charges that ordinary internal conversions in other cities avoid.
Arizona's HB 2720 (Ariz. Rev. Stat. section 9-461.18) restricts municipalities from imposing fees on ADUs that would effectively prohibit their construction or that exceed the actual cost of services provided. State law expressly prohibits requiring street improvements, and Glendale's ADU update materials confirm that street impact fees do not apply to ADUs. Applicants pay standard building, plumbing, mechanical, electrical, and fuel-gas permit fees through Glendale Building Safety, scaled to construction valuation under the City's adopted fee schedule. Because Glendale uniquely requires a separate water meter and new tap to the city water main for each ADU, water development and meter fees can be substantial compared to other Arizona cities that allow shared meters. Sewer connection fees may also apply if a new sewer service is installed. Glendale's draft ADU fee estimates (March 2025) provide approximate ranges for typical scenarios.
Failure to pay required permit and connection fees blocks issuance of building permits and prevents lawful construction. Excessive fees that violate Ariz. Rev. Stat. section 9-461.18 may be challenged through administrative appeal or court action. Unauthorized water taps discovered later result in disconnection, back-billing, and code enforcement. Skipping the separate-meter requirement violates Glendale's ADU ordinance and may trigger certificate-of-occupancy denial.
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Side-by-side rule comparisons with other cities in Maricopa County.
See how other cities in Maricopa County handle adu impact fees.
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