Last updated: October 22, 2026
Short answer: File a Petition for Review of Valuation with the Maricopa County Assessor within 60 days after your Notice of Valuation is mailed, with comparable sales or an appraisal. For tax year 2027, that deadline was April 21, 2026. A lower Full Cash Value only cuts your taxes if it drops below your Limited Property Value. Check your home's value.
Key takeaways
- Appeals are due within 60 days after the Assessor mails your Notice of Valuation (A.R.S. § 42-16051). For the 2027 notices mailed February 20, 2026, the deadline was April 21, 2026.
- You can appeal the Full Cash Value (market value) or your legal class. The Limited Property Value, which your taxes are based on, is not appealable.
- Avondale's 2027 median Full Cash Value is $332,000, but the median Limited Property Value is only $171,745, so for most homes a market-value appeal won't change the tax bill.
- Missed the deadline? A Notice of Claim can fix factual errors, like wrong square footage, through December 31 and back three years.
¡Qué tal! I'm Rosie Armenta. Every February, when the Notices of Valuation land in mailboxes, Mariela and I get phone calls: "Rosie, the county says my house is worth what? Should I fight it?" Sometimes the answer is yes. A lot of the time, the honest answer is "it won't change your taxes." I'd rather tell you the truth than send you on a paperwork chase, so let me explain how it really works in Maricopa County.
What is the Notice of Valuation?
It's the yearly notice from the Maricopa County Assessor that shows your property's legal class, Full Cash Value (FCV), Limited Property Value (LPV), assessment ratio and assessed value. The Assessor's office describes the two values this way:
- Full Cash Value is the Assessor's estimate of market value. It's the value you can appeal.
- Limited Property Value is a value set by formula under the Arizona Constitution. It can rise no more than 5% a year and can never be higher than the FCV. Since 2015, both primary and secondary property taxes are figured on the LPV. The LPV is not appealable.
The notice comes out early in the year, about a year and a half before the tax bill it applies to. For example, the notices for tax year 2027 were mailed February 20, 2026.
Will appealing my value lower my property taxes?
Here's the part most people don't hear. Look at Avondale's single-family medians from the Assessor's 2026–2027 report:
| Avondale single-family median | Tax year 2026 | Tax year 2027 | Change |
|---|---|---|---|
| Full Cash Value (appealable) | $340,600 | $332,000 | −2.5% |
| Limited Property Value (what you're taxed on) | $163,567 | $171,745 | +5.0% |
Source: Maricopa County Assessor, Tax Year 2026 & 2027 Comparison, Single Family Residential by City.
For a typical Avondale home, the FCV is almost twice the LPV. So let's say you win an appeal and the county lowers your 2027 FCV by 10%:
| Worked example (Avondale 2027 medians) | Before appeal | After a 10% FCV cut |
|---|---|---|
| Full Cash Value | $332,000 | $298,800 |
| Limited Property Value | $171,745 | $171,745 (no change, still below FCV) |
| Estimated tax, Pendergast/Tolleson tax area at 2026 rates | about $2,139 | about $2,139 |
My math: LPV × 10% assessment ratio × 12.4556 per $100 (Maricopa County 2026 Tax Rates sheet, area 920100). Future rates will differ.
The bill doesn't move, because the LPV is still under the new FCV. For a median Avondale home, the FCV would have to fall about 48%, below $171,745, before it touched the taxable value.
When an appeal can matter: if your FCV is already close to your LPV (for example, some newer homes or homes revalued after big permitted changes), if your FCV is truly far above what your home could sell for, or if your legal class is wrong (say you live there, but it's classified as a rental, which loses the State Aid to Education credit). Look at both numbers on your notice before deciding.
How do I file an appeal with the Maricopa County Assessor?
- Check the deadline on your notice. By law, you have 60 days from the date the Assessor mailed it (A.R.S. § 42-16051). A U.S. Postal Service postmark counts as the filing date.
- Compare your FCV and LPV. If the FCV is far above the LPV, a value appeal may not change your bill.
- Gather evidence. The petition must state your opinion of value and the method behind it. For the market approach, the law requires at least one comparable property in the same area or a recent sale of your home. Recent comparable sales, an appraisal, or proof of condition problems all help.
- File the petition. During appeal season the Assessor accepts appeals online. You can also mail or hand-deliver the Petition for Review of Valuation (AZDOR Form 82130R) to 301 W. Jefferson St., Phoenix. The Assessor says email isn't accepted for real property appeals.
- Watch for the decision. If the Assessor denies all or part of it, Arizona law gives you 25 days after the decision is mailed to appeal to the State Board of Equalization or to court (A.R.S. § 42-16056).
All of this is on the Assessor's appeals page. Filing an administrative appeal with the Assessor is free.
What if I missed the appeal deadline?
You still have options for some problems:
- Notice of Claim (factual errors). If the Assessor has a fact wrong, like 3,000 square feet when your home is 2,000, or a classification that's been wrong for years, you can file a Notice of Claim. For 2026 claims, it can be filed through December 31, 2026, and can reach back to 2023, 2024 and 2025 with documentation. If approved, the Treasurer may issue a refund.
- Residential Legal Class Change form. If a home recently became your primary residence, this updates the class. Per the Assessor, if it became your primary residence between January 1 and July 1, 2026, you can update both 2026 and 2027; after July 1, 2026, only 2027.
- Tax Court. If you missed April 21, you can still appeal your 2027 value directly to the Arizona Tax Court, using the Small Claims Division for homes, through December 15, 2026 (A.R.S. § 42-16201). There's a filing fee, and for anything complex, talk with an attorney.
Are there other ways to lower my Maricopa County property taxes?
- Senior Valuation Protection ("senior freeze") freezes the LPV for three years for qualifying owners 65 and older. For 2026, the 3-year average income of all owners on title can't exceed $47,712 for one owner or $59,640 for two or more. Apply January 1 to September 1, and renew every 3 years. See the Assessor's valuation relief FAQ.
- Personal exemptions for widows, widowers, people with a total and permanent disability, and veterans with a service-connected disability, within income limits.
- Make sure you're class 3 if you live in the home. Owner-occupied homes get the State Aid to Education credit.
For the full picture of how bills are calculated, read how much property taxes are in Avondale. Thinking about selling? Here's what it costs to sell a house in Avondale.
Want a second opinion on your home's value?
The Assessor's number is a mass-appraisal estimate. If you're thinking about selling, refinancing, or appealing, get a real-world look at your value: request a free home value report, see what Avondale homes are worth in 2026, or check the Avondale market report. Call or text me at 623-295-5770, and Mariela or I will pull recent comparable sales for you, free.
Frequently Asked Questions
What is the deadline to appeal my property value in Maricopa County?
You have 60 days from the date the Assessor mailed your Notice of Valuation (A.R.S. § 42-16051). For tax year 2027, notices were mailed February 20, 2026, and the deadline was April 21, 2026. Check the date printed on your own notice.
Can I appeal my Limited Property Value in Arizona?
No. The Maricopa County Assessor says the Limited Property Value is not an appealable value. You can appeal the Full Cash Value or the legal classification. The LPV can rise no more than 5% a year and can never exceed the Full Cash Value.
Will a lower Full Cash Value lower my property taxes?
Only if the new Full Cash Value falls below your Limited Property Value, because taxes are based on the LPV. In Avondale, the 2027 median FCV is $332,000 and the median LPV is $171,745, so for a typical home a 10% FCV reduction wouldn't change the bill.
How do I file a property tax appeal in Maricopa County?
During appeal season you can file online with the Maricopa County Assessor, or mail or hand-deliver the Petition for Review of Valuation (AZDOR Form 82130R) to 301 W. Jefferson St., Phoenix. State your opinion of value and include evidence such as comparable sales or an appraisal. Email isn't accepted for real property appeals.
What evidence do I need to appeal my property valuation?
Arizona law requires your opinion of value and the method behind it. Under the market approach, include at least one comparable property in the same area or a recent sale of your home. Recent comparable sales, a recent appraisal, and photos or estimates showing condition problems are the most useful.
What happens if the Assessor denies my appeal?
If the Assessor denies all or part of your petition, you have 25 days after the decision is mailed to appeal to the State Board of Equalization or to court (A.R.S. § 42-16056).
What can I do if I missed the Maricopa County appeal deadline?
If there's a factual error, like wrong square footage, you can file a Notice of Claim through December 31 of the current year, reaching back three years with documentation. If your home became your primary residence, a Residential Legal Class Change form may update the class. And if you missed April 21, you can still appeal your 2027 value directly to the Arizona Tax Court, using the Small Claims Division for homes, through December 15, 2026 (A.R.S. § 42-16201). There's a filing fee, and for anything complex, talk with an attorney.
Why did my LPV go up when my Full Cash Value went down?
Because the LPV is set by formula. It can rise up to 5% a year until it reaches the Full Cash Value, even in a flat or falling market. In Avondale, the median FCV fell 2.5% for tax year 2027 while the median LPV rose 5%.
About the authors
Rosie Armenta is a REALTOR® with West USA Realty. She and her daughter, Mariela Armenta, work together as a mother-daughter team. North Avondale (85392) is their home base, and they help buyers and sellers across the West Valley in English and Spanish. Call or text 623-295-5770, or get a free home value report.
Rosie Armenta, REALTOR® | West USA Realty | Equal Housing Opportunity
Figures were checked on October 22, 2026, from the Maricopa County Assessor's appeals page and FAQ, the Assessor's Tax Year 2026 & 2027 Single Family Residential comparison by city, the Maricopa County 2026 Tax Rates sheet, and Arizona Revised Statutes §§ 42-16051, 42-16056 and 42-16201. Estimates are for illustration only. This article is general information, not tax or legal advice. For complex appeals, talk with a tax professional or attorney.