Maricopa County Property Tax Appeal 2026
How to appeal your property assessment in Maricopa County (Phoenix), AZ. Everything below is pulled from Maricopa County Assessor’s Office. Always confirm the current details with the county before filing — this is general information, not legal advice.
Within 60 days of the Notice of Valuation mailing date for the administrative appeal to the Assessor
$425,000
~0.6% effective rate
Petition for Review of Valuation
Maricopa County property tax appeal deadline 2026
The 2026 deadline to appeal your Maricopa County property assessment is Within 60 days of the Notice of Valuation mailing date for the administrative appeal to the Assessor. File your Petition for Review of Valuation with Maricopa County Assessor’s Office on or before that date — miss it and you generally wait until next year. File as early in the window as possible to secure a hearing slot.
Who assesses & hears your appeal
Maricopa County Assessor’s Office
Appeals are heard by the Maricopa County Assessor (administrative appeal), then the State Board of Equalization.
How to file in Maricopa County
Online via the Maricopa County Assessor eAppeal portal
mcassessor.maricopa.govMail the Petition for Review of Valuation to the Assessor
301 W Jefferson St, Phoenix, AZ 85003
Arizona notices of value are mailed early (often February–March) for a tax year roughly 18 months out, so the appeal window opens well before the bill arrives.
Maricopa County property tax appeal FAQ
How long do I have to appeal in Maricopa County?
You have 60 days from the mailing date on your Notice of Valuation to file an administrative appeal (Petition for Review of Valuation) with the Assessor.
Deadlines, forms, and contact details change — always confirm with Maricopa County Assessor’s Office before filing. This is general information, not legal advice.
Appeal your Maricopa County assessment
Check your property for $4.99 (credited), then get the full comparable-sales packet and AI appeal letter for a flat $29 — $19 at launch. Built for AZ filings.