A property tax appeal appraisal is an appraisal of real property prepared to support an owner’s challenge to the assessed value a local taxing authority placed on it. The value work is familiar. What makes these files different is the valuation date the jurisdiction uses, deadlines you do not control, and the chance you will be asked to explain your report to a board or hearing officer.
This article is one piece of our guide on the main private assignment types. Related reading: the private appraisal engagement letter, responding to a private appraisal inquiry the same day, and divorce appraisals: effective dates, intended users, and testimony.
Valuation dates: the jurisdiction sets them, not the calendar
The most common mistake on a tax appeal file is appraising the property as of today. Many jurisdictions assess as of a fixed valuation or status date that can fall months, or sometimes more, before the tax bill arrives or the appeal is filed. Some use a different date for condition than for market value. If you appraise as of the wrong date, the report may not help the owner, no matter how good the comparables are.
Ask the client, their attorney or tax consultant, or the assessor’s published rules which date applies, and state it plainly in the engagement letter and the report. When the date is in the past, treat the assignment as retrospective: use sales and market conditions that reflect what was known as of that date, and disclose any extraordinary assumption about condition you could not verify for that date.
Deadlines are short and they do not move
Appeal and grievance windows are set locally, often vary from one county or town to the next, and can be brief. An owner who calls a week before the filing deadline needs to know right away whether you can deliver in time. That is why fast, clear replies win these files, and why it pays to know the windows in the counties you cover before the phone rings.
Get the filing deadline and any hearing date from the client up front, put the delivery date in writing, and decline politely when you cannot meet it. A late report is worth very little to a tax appeal client.
Know what the board will accept
Review boards and assessment offices differ in what they want to see. Some accept a full appraisal report, some expect specific forms or exhibits alongside it, and some limit how much evidence an owner can submit or when. Learn the basics for your counties so you can scope the report to what will actually be read. Intended use drives scope: a report meant to support an assessment appeal should be written for that use and those intended users, not copied from a lender form.
Name the intended users carefully. The owner and their representative are typical. The assessor and the board will read the report, but reading it does not make them intended users unless you say so.
Hearings and independence
Many appeals settle on paper. Others go to an informal review or a formal hearing where you may be asked to appear or answer questions. Decide in advance whether you take that work, and say in the engagement letter that preparation and appearance time are billed separately.
Independence matters here as much as anywhere. The owner wants a lower number, and that is understandable, but your job is a credible opinion of value as of the required date. You cannot promise a result or tie your fee to the outcome. A report that is clearly reasoned and honest is also the one a board is most likely to take seriously.
Why this work is worth adding
Tax appeal work tends to come in seasonal waves around local filing windows, and owners often search for help in those few weeks. Appraisers who show up for “tax appeal appraisal” in their towns, answer quickly, and explain dates and deadlines in plain words get the call. Those clients also come back, and they refer neighbors facing the same reassessment.
This is a practice note, not legal or tax advice. Valuation dates, filing rules, and hearing procedures vary by state and locality, so follow the jurisdiction’s published rules and the client’s counsel. For scope questions across assignment types, see the USPAP and scope of work section of the Private Appraisal Work Guide.
Part of the Private Appraisal Work Guide — assignment types, USPAP scope, fees, and how private clients find appraisers.
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