Receiving a property tax bill that seems too high can be frustrating, but homeowners have the legal right to challenge their assessed value. Understanding how to appeal a property tax assessment can potentially save hundreds or even thousands of dollars annually. This guide walks through the entire process, from reviewing your assessment notice to presenting your case before a review board.

What Is a Property Tax Assessment?

A property tax assessment is an official valuation of your property conducted by a local government assessor. The assessed value is used to calculate your annual property tax bill by multiplying it against the local tax rate (mill rate). Assessments may reflect full market value or a percentage of it, depending on your jurisdiction.

Local governments rely on property taxes to fund schools, roads, emergency services, and other public infrastructure. Assessors typically use mass appraisal techniques, applying market data to entire neighborhoods rather than inspecting each property individually. This approach, while efficient, can produce inaccurate valuations for individual properties with unique characteristics or recent damage.

Most jurisdictions reassess properties on a regular cycle — annually, every two years, or every few years. When market conditions shift rapidly, assessed values may lag behind or overshoot actual market prices, creating grounds for an appeal.

Common Reasons to Appeal a Property Tax Assessment

Property owners typically appeal when their assessed value exceeds the property’s fair market value, when comparable properties in the neighborhood are assessed at lower values, or when the assessment contains factual errors such as incorrect square footage, bedroom count, or lot size.

• Overvaluation: The assessed value is higher than what the property would realistically sell for in the current market.
• Factual errors: The assessment record lists incorrect property characteristics (e.g., 4 bedrooms when there are 3).
• Unequal assessment: Similar neighboring properties are assessed at significantly lower values.
• Property condition issues: Structural damage, foundation problems, or deferred maintenance not reflected in the assessment.
• Recent purchase price: You purchased the property for less than the assessed value, providing direct market evidence.

Step 1 — Review Your Assessment Notice Carefully

When your assessment notice arrives, verify every factual detail: property address, lot size, building square footage, number of rooms, year built, and any special features. Errors in these fields directly inflate assessed value and are among the easiest grounds for a successful appeal.

Request a copy of your property record card from the assessor’s office. This document contains all the data the assessor used to value your property. Compare it against your deed, survey, and any home inspection reports you have on file. Even a small discrepancy — such as an extra bathroom that does not exist — can meaningfully reduce your assessed value.

Step 2 — Research Comparable Sales (Comps)

Comparable sales, or “comps,” are recent sales of similar properties in your area. If homes with similar size, age, condition, and location sold for less than your assessed value, those sales constitute strong evidence that your assessment is too high.

Look for sales within the past 6 to 12 months within a half-mile to one-mile radius of your property. Focus on properties that match yours in square footage (within 10–15%), lot size, bedroom and bathroom count, and construction type. Public records, county assessor websites, and real estate listing platforms all provide access to recent sales data.

Compile at least three to five comparable sales that support a lower valuation. Document each comp with the sale price, sale date, address, and key property characteristics.

Step 3 — File Your Appeal Before the Deadline

Every jurisdiction sets a strict deadline for filing property tax appeals, typically 30 to 90 days after assessment notices are mailed. Missing this window forfeits your right to challenge the assessment for that tax year, so prompt action is essential.

Obtain the appeal form from your local assessor’s office or board of review website. Most jurisdictions now offer online filing. Complete the form accurately, stating the grounds for your appeal (overvaluation, factual error, or unequal assessment) and the value you believe is correct. Attach supporting documentation, including your comparable sales analysis and any photographs of property deficiencies.

Keep copies of everything you submit and request a confirmation of receipt. Note the hearing date assigned to your appeal.

Step 4 — Request an Informal Review First

Many jurisdictions offer an informal review meeting with the assessor before a formal hearing. This step can resolve straightforward errors quickly and without the need for a formal board appearance. Bring your documentation and present your case calmly and factually.

During the informal review, the assessor may acknowledge errors or agree that the evidence supports a lower value. If an agreement is reached, the assessment is adjusted without proceeding to a formal hearing. If no agreement is reached, you retain the right to continue to the formal appeal process.

Step 5 — Present Your Case at the Formal Hearing

At a formal appeal hearing before the board of review or assessment appeals board, you present your evidence and the assessor presents the basis for the original valuation. The board then issues a decision, which may uphold, reduce, or (rarely) increase the assessed value.

Organize your presentation clearly. Lead with any factual errors, as these are the most straightforward to resolve. Follow with your comparable sales analysis, explaining why each comp is relevant. If the property has physical deficiencies, provide photographs and, if possible, repair estimates or an independent appraisal.

Remain professional and factual throughout. Boards respond to evidence, not emotional arguments. A licensed appraisal, while not required, carries significant weight and is worth considering for high-value properties where the tax savings would justify the cost.

Appeal Costs and Timeline

Frequently Asked Questions

How often can I appeal my property tax assessment?

In most jurisdictions, you can file an appeal each year a new assessment is issued. However, if your assessment remains unchanged from the prior year, some localities require you to wait until the next reassessment cycle before filing again. Check your local rules for specific restrictions.

Do I need a lawyer to appeal my property taxes?

Legal representation is not required for most informal reviews or board hearings. Many homeowners successfully appeal on their own using comparable sales data and documented factual errors. Attorneys or tax appeal specialists are most useful for high-value properties, complex cases, or appeals that proceed to court.

Will appealing my assessment trigger a higher valuation?

In rare cases, a review could theoretically result in an increased assessment if the assessor discovers the property was undervalued. However, this outcome is uncommon. Most boards focus solely on whether the current assessment is accurate, not on identifying undervalued properties.

How long does a property tax appeal take?

Informal reviews are typically resolved within a few weeks. Formal hearings before a board of review usually occur within one to six months of filing. Court appeals can take a year or more. The timeline varies significantly by jurisdiction and caseload.

What happens if I win my appeal?

If your appeal is successful, your assessed value is reduced, lowering your property tax bill. Depending on when the decision is issued, the reduction may apply to the current tax year or the following year. Some jurisdictions issue refunds for overpaid taxes if the appeal is resolved after payment has already been made.

Can I appeal if I just bought the property?

Yes. A recent purchase price below the assessed value is one of the strongest forms of evidence in a property tax appeal, as it represents an arm’s-length market transaction. Attach the closing disclosure or settlement statement to your appeal documentation.

Conclusion

Appealing a property tax assessment is a straightforward process when approached methodically. By reviewing your assessment record for errors, gathering comparable sales data, and presenting a clear, evidence-based case, many homeowners achieve meaningful reductions in their tax burden. Act promptly after receiving your assessment notice, meet all filing deadlines, and keep thorough documentation at every stage of the process.

Last modified: April 4, 2026