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Tax Appeal Appraisal

Property taxes are calculated from your home's assessed value, and assessors work at mass scale: models, neighborhood factors, and data that can be stale or simply wrong about your house. When the assessment overshoots the value your state's rules say it should reflect (market value in many states; a ratio, cap, or fixed valuation date in others), an independent appraisal is the strongest piece of evidence a homeowner can bring to an appeal.

How the appeal process works

Details vary by state and county, but the shape is consistent:

1. You receive an assessment notice with a deadline to appeal. Deadlines are strict and short (Georgia, for example, allows 45 days from the notice date; California appeals are filed with the county's assessment appeals board on a set application window). Check your county's notice the day it arrives.
2. Informal review. Many counties let you first raise the issue with the assessor's office directly; some disputes end here.
3. Formal appeal. You present evidence to a county board (board of equalization, assessment appeals board, or similar). In practice you carry the evidence burden in most places, though formal burden-of-proof rules vary by state.
4. Evidence. Comparable sales, condition documentation, and, most persuasively, an independent appraisal by a licensed appraiser, often with an effective date matching the assessment date your county uses.

Why an appraisal instead of printouts of nearby sales

Board members see stacks of cherry-picked comparables every session. A signed, USPAP-compliant report from a licensed appraiser carries professional weight: it is inspection-based, it adjusts the comparables properly, and the appraiser is an impartial professional rather than an interested party. Note that the valuation date matters: assessments value your home as of a specific date set by state law, so tell the appraiser this is a tax-appeal assignment; a retrospective effective date is routine work.

The math before you start

An appeal makes financial sense when the plausible reduction times your tax rate outruns the cost of the evidence. A consumer-direct appraisal often costs a few hundred dollars ($300–$600 is a common range, varying by market). If your effective tax rate is 1.2% and the assessment is $60,000 too high, that is roughly $720 per year, so the appraisal can pay for itself in the first year, and the savings can recur while the corrected value stands (how long that is depends on your state's reassessment cycle). If the gap is $10,000, start with the free informal review instead.