Property owners often use the words assessment and appraisal interchangeably, but the distinction matters when reviewing a tax bill.
What is a property tax assessment?
An assessment is created by the local assessing authority under the rules that apply in that jurisdiction. Depending on the state, the notice may show estimated market value, assessed value, taxable value, or several of those figures at once.
The assessor may use mass-appraisal models that evaluate many properties using common data, neighborhood trends, sale information, and standardized adjustments.
What is an appraisal?
A private appraisal is typically a property-specific opinion of value prepared for a stated purpose and effective date. Appraisers may inspect the property, analyze comparable sales, and explain adjustments in more detail than a mass-assessment system can.
Why can the numbers differ?
The two values may use different effective dates, different data, different assumptions, or different definitions. The tax assessment can also be affected by statutory assessment ratios, caps, exemptions, or classification rules that do not appear in a conventional appraisal.
Can an appraisal help in an appeal?
Potentially. A credible appraisal can be persuasive when it addresses the same valuation date and property interest at issue in the assessment. An appraisal prepared years later, for a different purpose, or after substantial renovations may need explanation.
Which number should you challenge?
Read the notice and appeal instructions carefully. Some appeal systems ask you to challenge market value; others focus on assessed value, classification, exemption status, or taxable value. A strong case starts by identifying the exact issue the local board or assessor has authority to change.
Lowering Your Property Tax in America breaks down the numbers and shows how to turn them into a practical review and appeal plan. View it on Amazon →
Frequently asked questions
Property tax FAQ
Is assessed value the same as appraised value?
Not necessarily. Assessed value is created for property tax administration under local rules, while an appraisal is an independent opinion of value prepared for a particular purpose and date.
Can I use a private appraisal in a property tax appeal?
Often yes, subject to local rules. The appraisal is most useful when its effective date and valuation premise align with the assessment being challenged.
What is taxable value?
Taxable value is the value to which the applicable tax rate is applied. In some jurisdictions it may differ from assessed or market value because of caps, exemptions, or other statutory rules.
Property Tax Book
Take the next step with a complete property tax appeal guide.
Lowering Your Property Tax in America gives property owners a practical framework for reviewing an assessment, gathering evidence, preparing a filing, and presenting a focused case.
Buy the Book on Amazon