Why Property Tax Assessments Are Often Wrong
County assessors value millions of properties using mass appraisal techniques that rely on market data and formulas rather than individual inspections. This produces systematic errors: properties in declining neighborhoods may be over-assessed relative to actual market values; unique properties (unusual architecture, challenging lots) are poorly modeled by formulas; recent damage or deferred maintenance reduces value below assessed levels; and data entry errors (incorrect square footage, wrong number of bathrooms) inflate values. Studies consistently find that 20–40% of properties are over-assessed.
The Two-Part Test for a Successful Appeal
A property tax appeal succeeds on one of two grounds: (1) the assessed value exceeds the property's fair market value; or (2) the assessment is inconsistent with comparable properties in the same area (sometimes called "uniformity" or "equity" appeals). The first type requires establishing your property's actual market value below the assessment. The second type requires showing your neighbors' comparable properties are assessed lower, creating unfair treatment regardless of absolute value.
Evidence for a Successful Appeal
Strong evidence includes: a recent arms-length sale of your property at below assessed value; a recent professional appraisal supporting a lower value; sales data for comparable properties (sold within the past year, similar size and condition, same neighborhood) at prices below your assessed value; and documentation of property-specific conditions reducing value (structural issues, environmental problems, outdated systems). For commercial properties, income approach valuation evidence (showing income-based value below assessment) is common.
The Appeal Process and Deadlines
Property tax appeal deadlines are jurisdictionally specific and strictly enforced. Most counties require filing by a date in late spring or summer (often July or August). Missing the deadline waives your right to appeal for that year. The process typically involves: informal conference with the assessor's office; formal appeal to an assessment appeal board; and further appeal to state tax court if the board denies relief. Many jurisdictions offer informal review programs that resolve appeals without a formal hearing if the evidence is compelling.
Get a free property tax appeal consultation →
Discuss your case with Yates Anderson
Yates Anderson represents clients in Alabama, Florida, and beyond. Our attorneys handle complex disputes with the rigor of a national firm and the agility of a boutique. Request a case evaluation and an attorney will respond within one business day.
Frequently asked questions
How much can I save by appealing my property taxes?
The savings depend on how much your assessment is reduced and your local tax rate. A $50,000 reduction in assessed value at a 2% effective tax rate saves $1,000 per year. Because most appeals affect several years' assessments going forward, cumulative savings are substantial. The savings from a successful appeal generally far exceed the cost of filing the appeal and, if needed, professional assistance.
Do I need an attorney to appeal my property taxes?
For residential informal appeals and board hearings, most homeowners represent themselves successfully with organized comparables and a clear written argument. For large commercial properties, complex assessments, or state tax court appeals, an attorney or property tax consultant (who typically works on contingency) is worth considering. Many property tax consultants take a percentage of the first year's tax savings as their fee.
Will appealing my property taxes cause the assessor to increase my assessment?
In practice, assessment increases as retaliation for appeals are rare and legally problematic. Assessors cannot increase your assessment during an appeal as a response to the filing. The most that typically happens is that the assessor reviews the property more carefully—which occasionally reveals additional value, but most properties that are worth appealing are undervalued to begin with, so this risk is usually low.