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How to Read a Property Tax Assessment Notice
First: which of the three doors is this?
Three different problems arrive in the same envelope, and they go to three different places. If the assessed value looks wrong (higher than the home would sell for, higher than similar homes, or built on facts that are not true), that is a valuation appeal, and this guide is for you. If an exemption you qualify for (homestead, senior, disability, veteran) is missing from the notice, that is usually a separate application or a correction with the assessor's office, often the fastest fix in the whole envelope. If the value is right but the tax rate rose, an appeal board cannot help: boards rule on value, and elected bodies set rates. Name your door before you read further.
Field by field: one fictional notice, annotated
This notice is invented, adapted from the worked example in our property tax kit. The owner, Marcus, received a notice valuing his home at $410,000.
| Field | What it means | What to check |
|---|---|---|
| Parcel / account number and address | The property the notice is about. | That it is actually your parcel. Notices and record cards get crossed. |
| Tax year and valuation date | The year being taxed, and the date the value is supposed to reflect. | Evidence must speak to the valuation date, not to today's market. A sale from after that date says less than one from before it. |
| Property description (living area, lot, age, features) | The inputs the county's mass-appraisal model ran on. Marcus's notice and record card list 2,400 square feet of living area. | Every line against reality. His floor plan and purchase appraisal say 1,900 square feet. A 500-square-foot input error is the cheapest finding in any appeal: pure fact, documented twice. |
| Market value | What the model says the property would sell for: $410,000 for Marcus, land plus improvements. | This is the number an appeal argues about. Compare it with real sales near the valuation date, not with asking prices or automated estimates. |
| Assessment ratio and assessed (taxable) value | Many jurisdictions tax a set fraction of market value. Assessed value equals market value times the ratio. | Know your jurisdiction's ratio before judging the number. A low-looking assessed value may just reflect a fractional ratio, and your argument has to target the market value behind it. |
| Exemptions shown | Reductions already applied to your taxable value. | Every program you qualify for is actually listed. A missing exemption is a correction, not a valuation appeal, and usually has its own form and deadline. |
| Prior year value and the change | Last year's figure next to this year's. | A big percentage jump is a prompt to check the inputs, not proof of an error. If the whole market moved, the increase may reflect it. |
| Appeal deadline and filing instructions | Where and by when a formal appeal must be filed. Some jurisdictions also set a separate evidence deadline before any hearing. | Transcribe the exact dates the day the notice arrives, and set your own action date a week ahead of each. |
Where the number came from
Nobody walked through Marcus's house with a clipboard. Assessors value thousands of properties at once with mass-appraisal models built on the property record card (size, lot, age, neighborhood) and recent sales. The model is fast and consistent, and it is not personal: it cannot see an unfinished basement, a cracked foundation, or 500 square feet that exist only on paper. That is why the record card is where the easiest errors live, and why reading the notice means auditing its inputs before arguing about its output.
It is also why the exercise is worth doing carefully. University of Chicago research (Berry, 2021) found that assessments are typically regressive (lower-priced homes are assessed at a higher share of their actual sale price than higher-priced homes) and that this pattern is present in at least two-thirds of U.S. counties. That is a research finding about systems, not a claim about your parcel. Your parcel is decided by your record card and your street's sales.
What to do next
- Transcribe the notice exactly: values, ratio, exemptions, dates. Do not work from memory or from the envelope's summary.
- Calendar the filing deadline, the evidence deadline if there is one, and the tax bill due date, each with your own action date a week earlier.
- Pull your property record card from the assessor and check every input line against your home as it actually is.
- Check your exemptions before drafting anything. If one is missing, fix that first.
- If the value itself is your door, gather real comparable sales near the valuation date. The evidence guide in this library covers what boards weigh.
The full kit
The Property Tax Assessment Appeal Kit ($29) works the whole sequence: a jurisdiction lookup for your local rules and deadlines, the record-card audit, comparable selection, the equalization check, and letter templates for records requests and the formal appeal.
New to PocketBack? Start with The Paperwork Audit, our free checklist. It uses the same method on six everyday documents.
Sources
- Your county assessor's office and board of review: the primary source for your notice, your property record card, your jurisdiction's assessment ratio, and your appeal rules and deadlines.
- Berry, "Reassessing the Property Tax," University of Chicago Harris School of Public Policy (2021): assessment regressivity present in at least two-thirds of U.S. counties.