Property Tax Assessment Appeals
Property taxes are based on the assessed value of your property, determined by your local tax assessor. If you believe your assessment is too high, you have the right to appeal — and many homeowners who do so receive a reduction.
How Property Tax Assessments Work
Your property tax bill is calculated as:
Assessed Value × Tax Rate (Mill Rate) = Property Tax
The assessed value is supposed to reflect the fair market value of your property (or a percentage of it, depending on your state). Assessors determine this value using:
Comparable sales — recent sale prices of similar properties in your area
Cost approach — what it would cost to rebuild your home minus depreciation
Income approach — for rental or commercial property, based on the income the property generates
Grounds for Appealing
You may have a valid appeal if:
Overvaluation — the assessed value exceeds your property's actual fair market value
Unequal assessment — your property is assessed higher than comparable properties in your area
Incorrect property data — errors in square footage, lot size, number of bedrooms/bathrooms, age of the home, or condition
Failure to account for defects — the assessment doesn't reflect foundation problems, flood damage, environmental contamination, or needed repairs
Neighborhood decline — declining property values in your area are not reflected in the assessment
Gathering Evidence
Strong appeals rely on solid evidence:
Comparable Sales Data
Find 3-5 recent sales (within the past 6-12 months) of properties similar to yours in size, age, condition, and location
Adjust for differences (a comparable with a pool is worth more than one without)
Public records, real estate websites, and your real estate agent are good sources
Property Data Verification
Obtain your property record card from the assessor's office
Check every data point: square footage, lot size, number of rooms, building materials, year built
Errors are surprisingly common and can significantly affect the assessed value
Independent Appraisal
A professional appraisal ($300-$500) provides an independent opinion of value
Particularly useful for unique properties or those with significant defects
The cost is often recouped through tax savings within the first year
Photos and Documentation
Photos of needed repairs, structural issues, or neighborhood problems
Contractor estimates for necessary repairs
Evidence of environmental issues (flood zone, noise, contamination)
The Appeal Process
Step 1: File the Appeal on Time
Deadlines are strict — typically 30-90 days after receiving your assessment notice. Missing the deadline usually means waiting until next year.
Step 2: Informal Review
Many jurisdictions offer an informal review with the assessor's office before a formal hearing. This is often the fastest way to resolve simple errors.
Step 3: Formal Hearing
If the informal review doesn't resolve the issue, you'll appear before a Board of Review or Board of Equalization. At the hearing:
Present your evidence clearly and concisely
Focus on facts, not emotions ("my taxes are too high" is not a legal argument)
Bring organized copies of all evidence for the board members
Be respectful and professional
Step 4: Further Appeals
If you're denied, most states allow further appeals to:
State tax tribunal or court
State board of tax appeals
Circuit or superior court
Tips for Success
Appeal every year if your assessment is consistently too high
Monitor comparable sales in your neighborhood
Attend your hearing in person — it significantly increases success rates
Consider hiring a property tax attorney or consultant for high-value properties (many work on contingency)
Disclaimer: This guide is for informational purposes only. Property tax assessment procedures vary by state and county.