There are two ways to say your assessment is wrong. A value appeal says the county's appraised value is more than your property was worth on January 1. A uniformity appeal says your property is taxed on a larger share of its value than other property in the county. In Tennessee, a uniformity appeal comes back to the same proof as a value appeal. This page explains why, and what evidence each one needs.
What uniformity means
The Tennessee Constitution says the ratio of assessment to value "shall be equal and uniform throughout the State" (Article II, Section 28). Property in the same class must be taxed on the same share of its value.
State law lets an owner appeal to the county Board of Equalization on three grounds (T.C.A. § 67-5-1407). The property is in the wrong class. Its appraised value is more than its value under the law. Or other property is appraised for less than its value. The third ground is the uniformity complaint, and its remedy is for the other property.
How the state settles a uniformity claim
The State Board of Equalization does not compare your appraisal with your neighbors' appraisals. It finds your property's market value on January 1. Then it applies the county's appraisal ratio for that year. The Comptroller's appeals handbook calls this the "market value theory". It comes from a 1984 State Board decision, Laurel Hills Apartments.
The appraisal ratio is the county's appraised values divided by what property sells for. The State Board sets one for each county every year. At 1.00, the county's values match the market, and the ratio changes nothing. Below 1, a proven market value is reduced by the ratio. In a county at 0.80, each $100,000 of proven market value becomes $80,000.
For 2026, 40 of the 95 counties have a ratio below 1. The others are at 1.00.
Your county’s appraisal ratio
Why your neighbors' appraisals do not win
The handbook tells the State Board's judges that a list of neighbors' appraisals is not relevant to your value. Judges have turned down appeals built on the tax card values of nearby homes. In a 2023 decision, a value drawn from another property's assessment was set aside.
Earlier decisions said the same thing in another way. An owner who finds homes appraised lower than average does not get the same low appraisal. The State Board has made an exception only in rare cases where an owner was singled out, such as identical homes next door that were treated very differently.
What evidence each appeal needs
For a value appeal, show what your property was worth on January 1:
- Sales of similar homes near yours, completed before January 1 of the tax year.
- Errors in your record, such as the wrong square footage or a basement marked as finished.
- Photos and repair estimates for problems that lower the value.
- An appraisal, or your closing statement if you bought the home for less than its appraised value.
For a uniformity appeal, the proof is the same. First prove the market value. The board then applies the county's ratio. Other owners' appraisals are not proof of your value.
In a reappraisal year
A reappraisal sets every value at its market value on January 1 of that year. The state's ratio study says market and appraised values should be similar on that day. So the appeal is about the market value itself. An Attorney General opinion (20-10) says a ratio from a later year does not apply to a reappraisal year.
What this means for your appeal
Bring sales, not your neighbors' tax cards. If your county's ratio is below 1, a proven market value comes down by the ratio too. TN.tax builds the case from recent sales near your property. Start your free review.
Sources
- Tennessee Comptroller: Appeals Handbook, October 2023, sections IV.N and IV.X
- State Board of Equalization: appraisal ratios
- State Board of Equalization: County Board of Equalization Practice Manual
- Tennessee Attorney General: Opinion 20-10, which quotes Article II, Section 28
- UT County Technical Assistance Service: Complaints to the county board
This article is general information, not legal or tax advice.
Questions
What does uniformity mean in a property tax appeal?
Uniformity means your property is taxed on the same share of its value as other property in its class. The Tennessee Constitution requires it. In an appeal, the State Board settles it by finding your market value and applying the county's appraisal ratio.
Can I appeal because my neighbor's appraisal is lower?
Not on that alone. The Comptroller's appeals handbook says neighbors' appraisals are not relevant to your value. Show recent sales of similar homes instead.
What is an appraisal ratio?
It is the State Board's measure of how close a county's appraised values are to what property sells for. At 1.00, values match the market. Below 1, a proven market value is reduced by the ratio.