$ PlainPropertyTax

Property tax guide

How to Appeal Your Property Tax Assessment

To appeal a property tax assessment, homeowners typically file within 30-90 days of the assessment notice, gather comparable sales or an independent appraisal as evidence, and present the case to a local review board. Successful appeals commonly reduce the assessed value by 5-15%, cutting the annual bill by a similar margin.

According to the U.S. Census Bureau, the national average property tax bill was $1,993 across 3,152 counties in the 2020–2024 American Community Survey (latest estimates available as of January 2026). If your assessment runs high relative to comparable sales, an appeal can lower it. See our methodology.

Should You Appeal?

Before starting the appeal process, determine if you have a case. You likely have grounds to appeal if:

  • Your assessed value is higher than comparable homes in your area
  • Your property has defects or issues not reflected in the assessment (foundation problems, outdated systems)
  • The assessment contains errors (wrong square footage, extra bedroom counted, incorrect lot size)
  • Home values in your area have declined since the last assessment

Studies suggest 30-60% of properties are over-assessed, and about 50% of homeowners who appeal see a reduction.

Step 1: Get Your Assessment Notice

Your county assessor sends an annual notice showing your property's assessed value. Review it carefully for errors in:

  • Square footage (most common error)
  • Number of bedrooms and bathrooms
  • Lot size
  • Year built
  • Property class (residential vs. commercial)

Step 2: Research Comparable Sales

Find 3-5 recent sales of comparable homes in your area. "Comparable" means similar size, age, condition, and location. You can find this data through:

  • Your county assessor's website (many have online property records)
  • Real estate websites (Zillow, Redfin, Realtor.com sold listings)
  • Your local MLS (ask a real estate agent)

If comparable homes sold for less than your assessed value, that's strong evidence for a reduction.

Step 3: File Your Appeal

Most counties have a specific window for appeals (typically 30-90 days after receiving your assessment notice). The process usually involves:

  1. Filing a form with your county assessor or Board of Equalization
  2. Paying a small filing fee (usually $25-$50, often refunded if you win)
  3. Submitting your evidence (comparable sales, photos, inspection reports)

Important: Do not miss the deadline. Late appeals are almost never accepted.

Step 4: Present Your Case

You may have an informal review with the assessor first (recommended, many cases are resolved here). If not resolved, you'll present to a review board. Tips:

  • Be organized: Bring copies of all evidence for each board member
  • Be specific: Focus on comparable sales and factual errors
  • Be professional: Emotional arguments about affordability are less effective than data
  • Know your number: State what you believe the correct assessed value should be

Common Exemptions to Check

Before appealing, make sure you're receiving all exemptions you qualify for:

  • Homestead exemption: Available in most states for your primary residence
  • Senior citizen exemption: Age-based reductions (usually 65+)
  • Veteran exemption: For qualifying military service
  • Disability exemption: For qualifying disabilities
  • Agricultural exemption: For qualifying farm or ranch land

Check your county's tax data: Browse by state · Tax estimator

PlainPropertyTax is rendered directly from the U.S. Census Bureau's American Community Survey (ACS) 5-year estimates, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.