What Is Notice of Assessment?

An official document from the county assessor informing a property owner of their property's assessed value for the upcoming tax year.

Detailed Explanation

The notice of assessment is the document your county sends to inform you of your property's assessed value for the upcoming tax year. It goes by different names in different states. In Texas, it is the Notice of Appraised Value. In Florida, it is the TRIM (Truth in Millage) notice. In New York, some jurisdictions publish a tentative assessment roll. Regardless of the name, this document is the starting gun for the appeal process. When you receive it, check these items carefully: the property description (square footage, lot size, number of bedrooms and bathrooms), the assessed or appraised value compared to last year, any exemptions applied (homestead, senior, disability), and the appeal deadline and instructions. Errors in the property description are more common than you might expect. If the county has your home listed at 2,400 square feet when it is actually 2,100 square feet, that alone could inflate your value by tens of thousands of dollars. Similarly, check whether the county has accurately recorded your home's condition. A home that needs significant repairs should not be valued the same as a recently renovated property. If you believe the value is too high, the notice itself will tell you how and when to file an appeal. Do not ignore the notice or assume the county is correct. This is your annual opportunity to ensure you are not overpaying. It is worth being clear about what this document is not: it is not your tax bill, and waiting for the tax bill to arrive is one of the most common ways homeowners accidentally miss their appeal window. In most states the notice of assessment, not the tax bill, is what starts the appeal clock, and by the time the tax bill arrives months later, the deadline has often already passed.

How It Varies by State

TexasNotice of Appraised Value (April-May)

Mailed when value changes or a new exemption is applied. Includes property details, appraised value, and protest instructions. 30-day protest window.

FloridaTRIM Notice (August)

Shows just value, assessed value, exemptions, and proposed taxes from all taxing authorities. 25-day appeal window.

New YorkTentative Assessment Roll (May)

Published by assessor. Grievance Day allows property owners to file formal challenges.

IllinoisAssessment Notice (varies by county)

Mailed when township reassessment occurs. Cook County provides online lookup of assessment changes.

GeorgiaAssessment Change Notice

Mailed when the value changes. Starts a 45-day window to appeal, filed with the county Board of Tax Assessors, notably longer than the 25-30 day windows common elsewhere.

Common Misconceptions

Myth:If I did not receive a notice, my value did not change

Reality:Some states only mail notices when values change. Others publish the roll online. Check your county assessor's website annually even if you do not receive a physical notice.

Myth:The notice is the same as my tax bill

Reality:The notice shows the assessed value. The tax bill, which comes later, shows the actual amount you owe after all rates and exemptions are applied.

Myth:The property details on the notice must be accurate

Reality:Data errors are common. Always verify the square footage, lot size, bedroom/bathroom count, and property class listed on your notice against your actual property.

Myth:I can wait until my tax bill arrives to decide whether to appeal

Reality:By the time your tax bill arrives, the appeal window triggered by your notice of assessment has usually already closed. Act on the notice itself, not the bill that follows it months later.

Impact on Your Tax Bill

If your notice shows 2,400 square feet but your home is actually 2,100 square feet, that 300 square feet of error could inflate your value by $30,000 to $60,000 depending on your market. In a state with 2% effective tax rate, that translates to $600 to $1,200 per year in excess taxes from a simple data error.

Frequently Asked Questions

Is the notice of assessment the same as my property tax bill?
No. The notice of assessment shows your property's assessed value and starts your appeal window. Your tax bill, which typically arrives later, shows the actual dollar amount owed after rates and exemptions are applied.
What should I check first when I get my notice of assessment?
Compare the assessed or appraised value to last year, verify the property description (square footage, lot size, bedroom and bathroom count), confirm any exemptions were applied correctly, and note the appeal deadline.
What if my county never mailed me a notice?
Some states only mail a notice when your value changes, others publish the assessment roll online without a physical mailing. Check your county assessor's website directly each year rather than assuming no mail means no change.
Can I appeal after my tax bill arrives instead of when I get the notice?
Generally no. The notice of assessment, not the later tax bill, is what starts the appeal deadline in most states, and that window has typically closed by the time the bill shows up.

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