AppealDesk

Sumner County Property Tax Appeal, Tennessee

Travis BunnTravis Bunn·Updated July 24, 2026

Sumner County is located in north-central Tennessee, with Gallatin serving as the county seat and Hendersonville as the most populous city. The county is part of the Nashville metropolitan area and includes cities such as Gallatin, Hendersonville, Portland, Westmoreland, White House, Goodlettsville, Millersville, and Mitchellville. With a median home value of approximately $332,700 and an effective tax rate of 0.55%, Sumner County property owners pay a median of $1,837 annually in property taxes, below the national median of $2,400. This makes property tax appeals particularly valuable for homeowners seeking relief from over-assessments.

Notable cities: Hendersonville, Gallatin, Portland, Westmoreland, White House, Goodlettsville

Median Home

$332,700

Tax Rate

0.55%

Annual Tax

$1,837

Population

218,895

On the typical Sumner County home, valued near $332,700 at the county’s effective tax rate of 0.55%, an over-assessment of even 10% means you are overpaying year after year until you appeal it. Here is how to find out if yours qualifies.

2026 Appeal Deadline: June 13, 2026 for 2026 tax year appeals; typically mid-June annually

This year's appeal window has passed in most of Tennessee. Order now and we re-run your numbers free when the window reopens, so your evidence is ready the day your next notice lands.

The Sumner County Board of Equalization convenes in early June each year. The deadline to file an appeal is typically around June 13-14. Property owners should contact the assessor's office in early May to schedule an appointment, as hearing slots fill up quickly. The informal review period runs through May 31.

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How Sumner County Assesses Property

25%of market value

Assessed by: Sumner County Assessor of Property

Assessment cycle: 5-year cycle

Notices typically mailed: April-May

Tennessee assesses residential property at 25% of the appraised market value established by state law. The Assessor of Property determines your home's market value, then applies the 25% assessment ratio to calculate the assessed value upon which taxes are levied. For example, if your home's market value is $332,700 (the county median), at Tennessee's 25% assessment ratio your assessed value would be $83,175, resulting in approximately $1,837 in annual taxes at the county's effective rate of 0.55%. This means even a 10% over-assessment on a median-value home can cost you $184 per year until corrected.

The Appeal Process

Appeals are heard by the County Board of Equalization. The Sumner County Board of Equalization consists of five members appointed by the County Commission. During your hearing, you'll present evidence supporting your claimed value while the Board reviews your case. Decisions are mailed to property owners after the hearing.

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Step 1: Request an informal review with the Sumner County Assessor of Property. Contact the office at (615) 452-2412 during the informal appeal period (typically May). This optional but highly recommended step often resolves disputes without a formal hearing.

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Step 2: If the informal review doesn't resolve your concerns, call the assessor's office the first week of May to schedule a formal hearing with the Sumner County Board of Equalization. The deadline to schedule is typically mid-June (June 13, 2026 for the 2026 tax year).

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Step 3: Prepare your evidence including comparable sales data from similar properties in your neighborhood, photographs showing property condition or defects, repair estimates for any damage, and any professional appraisals. The Board only has authority to determine property value, not discuss tax rates.

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Step 4: Attend your scheduled hearing before the Sumner County Board of Equalization in June. Present your evidence clearly and explain why your property's assessed value should be reduced. The five-member board will review your case and issue a decision.

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Step 5: If you disagree with the Board's decision, you may appeal to the Tennessee State Board of Equalization. This appeal must be filed before August 1 for the tax year or within 45 days of the notice of the county board's action, whichever is later. File online through the State Board's website.

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Step 6: If the State Board appeal is unsuccessful, you may file a petition for judicial review in chancery court within 60 days of when the State Board's order becomes final.

Required form: No specific form required; contact assessor's office at (615) 452-2412 to schedule appeal appointment

Filing Methods

phone:Call (615) 452-2412 the first week of May to schedule an appointment with the Board of Equalization
in-person:355 N Belvedere Drive, Room 206, Gallatin, TN 37066. Monday-Friday 8:00 AM - 4:30 PM
online:State Board of Equalization appeals can be filed online at comptroller.tn.gov/boards/state-board-of-equalization after county-level appeal

Evidence to Bring

Comparable sales data from similar properties sold recently in your areaPhotographs documenting property condition, defects, or needed repairsProfessional appraisal report (if available)Repair estimates or contractor bids for needed workDocumentation of property characteristics that may reduce value

Sumner County Assessor Contact

Sumner County Assessor of Property

Website: https://sumnercountytn.gov/departments/assessor-of-property/

Online Portal: https://sumnertn.geopowered.com/propertysearch/

Hours: Monday-Friday 8:00 AM - 4:30 PM

Tax Exemptions in Sumner County

Elderly Tax Relief (Age 65+)

Relief on the tax of the first $30,000-$32,700 of market value (up to $27,000 paid by the state)

State-reimbursed property tax relief for low-income homeowners age 65 or older

Eligibility: Age 65+ by December 31 of tax year, combined household income of $37,530 or less (2026 limit), property used as primary residenceDeadline: 35 days after the tax delinquency date (typically April 5)

Disabled Homeowner Tax Relief

Relief on the tax of the first $30,000 of market value (up to $27,000 paid by the state)

State-reimbursed property tax relief for totally and permanently disabled homeowners

Eligibility: Totally and permanently disabled (typically SSA disability determination), combined household income of $37,530 or less, property used as primary residenceDeadline: 35 days after the tax delinquency date (typically April 5)

Disabled Veteran Property Tax Relief

Full relief on the first $175,000 of market value (increased from prior cap effective July 1, 2026 to $200,000)

State-reimbursed property tax relief for 100% service-connected disabled veterans

Eligibility: 100% permanent and total service-connected disability from U.S. Department of Veterans Affairs, OR totally disabled from wounds received in action, property used as primary residence, no income limit. Surviving spouses also qualify if not remarried.Deadline: Apply through County Trustee's office annually

Greenbelt (Agricultural, Forest, Open Space)

Property taxed on present use value rather than market value, typically resulting in substantial reduction

Use-value assessment for qualifying agricultural, forest, or open space land

Eligibility: Land must be in qualifying agricultural, forest, or open space use. Property owners must meet minimum acreage and use requirements.Deadline: Contact Sumner County Assessor of Property for application requirements

Sumner County Appeal Statistics

Avg Reduction

$661

Sumner County Appeal Packet · $49

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Sumner County?
The deadline to file an appeal with the Sumner County Board of Equalization is June 13, 2026 for the 2026 tax year, with appeals typically due in mid-June each year. However, you should contact the assessor's office at (615) 452-2412 the first week of May to schedule your hearing appointment, as the Board begins meeting June 1st and hearing slots fill up quickly. The informal appeal period runs through May 31st and offers an opportunity to resolve disputes before a formal hearing. Missing the June deadline means waiting an entire year before you can challenge your assessment again.
How do I file a property tax appeal in Sumner County?
To file a property tax appeal in Sumner County, start by calling the Assessor of Property office at (615) 452-2412 during the first week of May to schedule an appointment with the County Board of Equalization. You can also visit the office in person at 355 N Belvedere Drive, Room 206 in Gallatin during business hours (Monday-Friday 8:00 AM - 4:30 PM). Before filing a formal appeal, consider requesting an informal review with the assessor's staff, which runs through May 31st and often resolves disputes without a hearing. If you're not satisfied with the County Board's decision, you can appeal to the State Board of Equalization online at their website within 45 days of receiving the county board's decision.
What evidence do I need for a successful property tax appeal in Sumner County?
For a successful appeal in Sumner County, you need comparable sales data from at least three to five similar homes in your neighborhood that sold recently for less than your assessed value. Photographs documenting your property's condition, any defects, needed repairs, or factors that reduce value are essential visual evidence. Professional appraisals, contractor repair estimates, or documentation of property damage all strengthen your case. The Sumner County Board of Equalization can only address the value of your property, not the tax rate, so your evidence must demonstrate that your property's market value is lower than the assessor's determination. Organize your evidence clearly and be prepared to explain how each piece supports your requested value reduction.
What happens at a Board of Equalization hearing in Sumner County?
At a Sumner County Board of Equalization hearing, you'll present your case before five board members appointed by the County Commission to review property assessments. The hearing is your opportunity to explain why you believe your property is over-assessed and present evidence such as comparable sales, photographs, and repair estimates. The Board will ask questions about your evidence and consider the assessor's valuation. It's important to note that the Board only has authority to determine property value, not discuss tax rates or amounts. After reviewing your case, the Board will issue a decision either upholding, reducing, or potentially increasing your assessed value. You'll receive written notice of their decision by mail.
How much can I save by appealing my property taxes in Sumner County?
Successful property tax appeals in Sumner County save homeowners an average of $661 per year according to available data. On a median-value home of $332,700 with the county's 0.55% effective tax rate, even a 10% reduction in assessed value would save approximately $184 annually, or $920 over five years until the next reappraisal in 2029. Larger savings are possible if your property is significantly over-assessed, a 20% reduction on the median home would save $368 per year. These savings compound year after year, making the appeal process worthwhile even for modest reductions. Since Sumner County is on a 5-year reappraisal cycle with the next reappraisal scheduled for 2029, any reduction you secure now continues through 2028.
When does Sumner County mail property assessment notices?
Sumner County typically mails Assessment Change Notices in April and May each year, with the most recent batch mailed around April 19th in reappraisal years. These notices show your property's new market value as determined by county appraisers and clearly state that it is not a tax bill. If you receive an assessment change notice and disagree with the new value, you have the right to appeal through either the informal review process (running through May 31st) or the formal Board of Equalization process (beginning June 1st). The last countywide reappraisal was completed in 2024, and the next is scheduled for 2029, so most property values remain stable between reappraisals unless you make significant improvements or successfully appeal.
What is the homestead exemption worth in Sumner County?
Tennessee does not offer a general homestead exemption that reduces property taxes for all homeowners. Instead, Sumner County property owners may qualify for targeted state-funded tax relief programs based on age, disability, or veteran status. Elderly homeowners age 65+ with household income of $37,530 or less can receive state-paid relief covering taxes on the first $30,000-$32,700 of market value (up to $27,000 paid by the state). Disabled veterans with 100% service-connected disability receive relief on the first $175,000 to $200,000 of market value with no income limit. Totally disabled homeowners with income below $37,530 also qualify for relief on the first $30,000 of value. These programs are administered through the County Trustee's office, not the Assessor, and require annual application.
Can I appeal to the State Board if I disagree with the Sumner County Board of Equalization decision?
Yes, if you disagree with the Sumner County Board of Equalization's decision, you have the right to appeal to the Tennessee State Board of Equalization. Your appeal must be filed before August 1 for the tax year or within 45 days of the date the notice of the county board's action was mailed to you, whichever deadline comes later. You cannot skip the county-level appeal and go directly to the State Board, the county Board of Equalization is the mandatory first level of administrative appeal. Appeals to the State Board must be filed through their online filing system at the Tennessee Comptroller's website. If the State Board's decision is still unsatisfactory, you may further appeal to chancery court within 60 days of when the State Board's order becomes final.

Official Resources

Sumner County Assessor of Property Official Website →

Official county assessor site with assessment information, reappraisal schedules, and appeal process details.

Sumner County Property Search Portal →

Search property records, view current assessments, and access parcel information for Sumner County properties.

Tennessee State Board of Equalization - Appeal Filing →

File second-level appeals online after county Board of Equalization decisions and track appeal status.

Tennessee Property Assessment Database →

State comptroller resource for property assessment oversight, county assessment information, and tax relief program details.

For state-wide appeal information including Tennessee's assessment ratio and deadlines, see our Tennessee Property Tax Appeal Guide →

Considering professional help with your appeal? Compare pricing, coverage, and pros/cons in our Best Property Tax Appeal Services (2026) or browse side-by-side service comparisons →

More Tennessee Counties

Davidson County (Nashville)Hamilton County (Chattanooga)Knox County (Knoxville)Maury County (Columbia)Rutherford County (Murfreesboro)Sevier County (Sevierville)
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Sources: https://sumnercountytn.gov/departments/assessor-of-property/ | https://sumnercountytn.gov/departments/assessor-of-property/appealing-your-assessment/ | https://comptroller.tn.gov/boards/state-board-of-equalization/value-appeals.html | https://www.abodemoney.com/insights/property-tax/tennessee/sumner-county | https://propertytaxalmanac.com/tennessee/sumner/ | https://propertytaxrates.org/exemptions/tennessee/ | https://worldpopulationreview.com/us-counties/tennessee/sumner-county

Last verified: 2026-07-24