How to Read Your Property Assessment Notice

A property assessment notice is the official document your local tax assessor mails to tell you the assessed value they have placed on your property for the year, which is the value used to calculate your property tax bill. Reading it correctly means checking three things: that the property described is actually yours, that the assessed value is reasonable for what your property would sell for, and that any exemptions you qualify for are applied. Every number on the notice flows into your tax bill, so a mistake in the description or value can cost you money until you correct it.

Assessment notices go by different names depending on where you live: "Notice of Assessed Value," "Notice of Valuation," "Change of Value Notice," or "Assessment Change Notice." Whatever the heading says, the purpose is the same, and the review steps below apply.

Why the Assessment Notice Matters

Your assessment notice is not a bill. It is the assessor's opinion of your property's value, and it arrives before the tax bill so you have a window to review it and object if something is wrong. In most places, this notice is the trigger for your right to appeal. Once the review window on the notice closes, your options for challenging that year's value usually narrow significantly. That is why the notice deserves a careful read the day it arrives rather than a spot in a pile of mail.

What's on the Notice: Key Terms Explained

Different jurisdictions use different layouts, but most notices contain the same core fields. Learn these terms and the rest of the page becomes readable.

Assessed Value

The dollar value the assessor assigns to your property. Depending on your jurisdiction, this may be intended to reflect full market value or a legally defined percentage of it. Read the notice's own language to see which one applies to you.

Market Value (or Appraised Value)

The assessor's estimate of what your property would sell for. In some jurisdictions the assessed value equals market value; in others the assessed value is a fraction of it set by an assessment ratio.

Assessment Ratio (or Assessment Level)

If your area assesses at a percentage of market value, this is that percentage. It is applied to the market value to produce the assessed value. Not every jurisdiction uses one.

Taxable Value

The value left after exemptions and any assessment caps are subtracted from the assessed value. This is the number your tax rate is actually applied to. Taxable value can be lower than assessed value.

Exemptions

Reductions you qualify for, such as a homestead/primary-residence exemption, or exemptions for seniors, veterans, or people with disabilities. The notice should list which exemptions were applied. A missing exemption is one of the most common and most fixable errors.

Land vs. Improvement Value

Many notices split the value into land and "improvements" (the structures on the land). The two should add up to the total. This split is useful when you appeal, because you can dispute one component.

Parcel or Account Number

The unique identifier for your property in the assessor's system. You will need it to look up records, file an appeal, or call the office.

Prior-Year Value and Change

Many notices show last year's value next to this year's so you can see how much it moved. A large jump is worth understanding, but a change alone is not proof of error.

Property Description and Characteristics

Square footage, lot size, number of bedrooms and bathrooms, year built, and similar details. Errors here are common and directly affect value.

Review Period and Appeal Instructions

The notice states how long you have to respond and how to do it. Deadlines are typically expressed as a set number of days from the date printed on the notice, and both the date and the number of days vary by jurisdiction — read them off your own notice rather than assuming.

How to Read Your Assessment Notice: Step by Step

Work through the notice in this order.

1. Confirm the property is yours. Check the parcel/account number, the address, and the owner name. Assessors occasionally mail notices tied to the wrong parcel or with a stale owner of record.
2. Read the property characteristics line by line. Compare square footage, lot size, bedroom and bathroom counts, and year built against what you know to be true. Note any detail that is wrong or outdated.
3. Find this year's assessed value and market value. Identify which one drives your taxes and whether an assessment ratio is being applied.
4. Compare to last year. If the notice shows a prior-year value, note the change. A steep increase is a signal to look closer, not a conclusion on its own.
5. Check that your exemptions are applied. If you live in the home as your primary residence, or qualify as a senior, veteran, or person with a disability, confirm each exemption you are entitled to appears on the notice.
6. Sanity-check the value against reality. Ask whether you could realistically sell the property for the market value shown, as of the valuation date the notice references. If the number is clearly higher than what comparable homes are selling for, you may have grounds to question it.
7. Locate the deadline and appeal instructions. Read the exact response window off your notice and note how to file. Mark the deadline somewhere you will not miss it.
8. Decide whether to act. If the description is accurate and the value looks fair, no action is needed. If something is wrong, gather evidence and follow the notice's process before the window closes.

Quick Review Checklist

• [ ] Parcel/account number and address match my property
• [ ] Owner name is correct
• [ ] Square footage, lot size, room counts, and year built are accurate
• [ ] I've identified assessed value vs. market value (and any ratio)
• [ ] I compared this year's value to last year's
• [ ] Every exemption I qualify for is listed
• [ ] The market value is in line with what my property would sell for
• [ ] I found the response/appeal deadline on the notice
• [ ] I know how to file an appeal if I need to

Red Flags Worth a Closer Look

• Wrong physical details. Overstated square footage or a bedroom/bathroom count that is too high inflates value.
• A value out of step with the market. If nearby comparable homes are selling for noticeably less than your market value, that gap is your central appeal argument.
• A missing exemption. If your primary-residence or other exemption disappeared or was never applied, contact the assessor — this is often corrected without a formal appeal.
• Land or improvement value that looks off. Because notices split the two, an error in one component can be isolated and challenged.
• A description that no longer matches the property. Demolished structures, corrected records, or a lot that was never as large as listed all matter.

What to Do If Something Is Wrong

Start by contacting the assessor's office listed on the notice. Some errors — a clerical mistake in square footage, a dropped exemption — can be fixed informally with a phone call or a quick correction request, without a formal hearing. For a genuine disagreement about value, you generally file an appeal following the instructions on the notice, and you support it with evidence: recent sale prices of comparable properties, a recent appraisal, photos of condition problems, or documentation of the correct property characteristics. Keep copies of everything and note the date you file. Because deadlines and procedures differ by jurisdiction and can change from year to year, confirm the current rules on your notice or your county assessor's website before you rely on any general description of the process.

The Bottom Line

Your assessment notice is your one clear, time-limited chance each year to catch an error before it becomes a tax bill. Read it the day it arrives, verify the property and its details, confirm your exemptions, test the value against what your property would actually sell for, and note the deadline. Most notices are correct and need no action — but the ones that aren't are far easier to fix while the review window is still open.