Williamson County Property Tax Appeal, Tennessee

Travis Bunn·Updated July 24, 2026

Williamson County, located in Middle Tennessee with its county seat in Franklin, is home to approximately 275,000 residents and is the sixth-most populous county in the state. Major population centers include Franklin, Brentwood, Spring Hill, and Nolensville. With one of the highest median household incomes in Tennessee (approximately $125,000), the county has experienced rapid growth and is part of the Nashville metropolitan area. Property tax appeals are particularly important in Williamson County due to the county's elevated property values and ongoing reappraisal cycles that can result in significant assessment increases.

Notable cities: Franklin, Brentwood, Spring Hill, Nolensville

Median Home

$751,900

Tax Rate

0.40%

Annual Tax

$3,004

Population

275,636

On the typical Williamson County home, valued near $751,900 at the county’s effective tax rate of 0.40%, 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: Call the assessor's office the first week of June to schedule an appeal before the County Board of Equalization

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.

Williamson County's Board of Equalization meets every June. Property owners should call (615) 790-5708 during the first week of June to schedule an appeal hearing. An informal review with the county assessor is available before the formal Board of Equalization hearing and typically has a deadline within 30-45 days of receiving your assessment notice in April or May.

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How Williamson County Assesses Property

25%of market value

Assessed by: Williamson County Assessor of Property

Assessment cycle: quadrennial

Notices typically mailed: April-May

Tennessee uses a straightforward assessment system where residential property is assessed at 25% of market value, as mandated by the Tennessee Constitution. In Williamson County, this means if your home has a market value of $750,000, your assessed value would be $187,500 (25% of $750,000). At Williamson County's effective tax rate of approximately 0.40%, this would result in an annual property tax bill of approximately $3,000. The county is on a 4-year reappraisal cycle, with the most recent reappraisal completed in 2025.

The Appeal Process

Appeals are heard by the County Board of Equalization. The County Board of Equalization meets throughout June each year. During your hearing, you will present your evidence to the Board in person, explaining why your property's assessed value should be reduced. The Board will review your evidence, ask questions, and issue a written decision on your appeal.

Step 1: Request an informal review with the Williamson County Assessor of Property within 30-45 days of receiving your assessment notice (typically mailed in April-May). Contact the assessor's office at (615) 790-5708 to initiate this process.

Step 2: Gather evidence to support your appeal, including recent comparable sales of similar properties in your neighborhood, photographs of your property showing condition issues, repair estimates for needed work, and your property record card showing assessment details.

Step 3: If the informal review does not resolve your concern, file a formal appeal with the County Board of Equalization. Call (615) 790-5708 during the first week of June to schedule your hearing, as the Board meets throughout June each year.

Step 4: Attend your scheduled hearing before the County Board of Equalization in June. Present your evidence in person and explain why you believe your assessment is too high. The Board will review your case and issue a written decision.

Step 5: If you disagree with the County Board's decision, you may appeal to the Tennessee State Board of Equalization within 45 days of the county decision. File your appeal through the State Board's online filing system at comptroller.tn.gov.

Step 6: If the State Board denies your appeal, you have the option to file a petition in Williamson County Chancery Court within 60 days of the State Board's final decision.

Required form: Contact the Williamson County Assessor's Office at (615) 790-5708 to request appeal forms or schedule an informal review

Filing Methods

phone:Call (615) 790-5708 to schedule an appeal appointment with the County Board of Equalization during the first week of June

in-person:Visit the Williamson County Assessor's Office at 1320 West Main Street, Suite 300 & 313, Franklin, TN 37064

mail:Mail appeal documentation to Williamson County Assessor of Property, 1320 West Main Street, Suite 300, Franklin, TN 37064

Evidence to Bring

Recent comparable sales (sold within the past 6-12 months, similar size, age, and location)Photographs showing property condition, defects, or needed repairsProfessional appraisal or contractor repair estimatesProperty record card from the assessor showing assessment detailsDocumentation of any errors in property characteristics (square footage, bedroom count, etc.)

Williamson County Assessor Contact

Williamson County Assessor of Property

Phone: (615) 790-5708

Address: 1320 West Main Street, Suite 300 & 313, Franklin, TN 37064

Website: https://www.williamsoncounty-tn.gov/64/Property-Assessor

Online Portal: https://inigo.williamson-tn.org/property_search/

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

Tax Exemptions in Williamson County

Tennessee Tax Relief Program (Elderly/Disabled)

Tax relief on first $32,700 of market value (approximately $130-$200 in tax savings depending on local rates)

State-reimbursed property tax relief for seniors age 65+ or totally disabled homeowners with low income

Eligibility: Age 65 or older, or totally and permanently disabled, with total household income at or below $37,530 for 2026. Must own and occupy the property as primary residence.Deadline: April 5 annually

Disabled Veteran Tax Relief

Tax relief on first $175,000 of market value (approximately $700-$1,000 in tax savings)

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

Eligibility: Veterans rated 100% disabled by the VA for service-connected disabilities, or their surviving spouses. No income limit.Deadline: April 5 annually

Greenbelt (Agricultural/Forest Use)

Can reduce assessed value by 60-90% for qualifying land

Allows qualifying agricultural, forest, or open space land to be assessed at use value rather than market value

Eligibility: Minimum 15 acres actively farmed or managed forest land, or smaller tracts meeting specific income requirementsDeadline: Contact Williamson County Assessor at (615) 790-5708

Williamson County Appeal Packet · $49

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Frequently Asked Questions

What is the deadline to appeal my property taxes in Williamson County for 2026?

The Williamson County Board of Equalization meets every year in June, and you must call the assessor's office at (615) 790-5708 during the first week of June to schedule your appeal hearing. However, it's strongly recommended to first pursue an informal review with the county assessor within 30-45 days of receiving your assessment notice, which is typically mailed in April or May. The informal review process is faster, doesn't require a formal hearing, and can often resolve assessment disputes without going before the Board of Equalization.

How does Williamson County's 4-year reappraisal cycle affect my property taxes?

Williamson County is on a 4-year reappraisal cycle, with the most recent countywide reappraisal completed in 2025. During a reappraisal year, your property's appraised value is updated to reflect current market conditions, which can result in significant increases in rapidly appreciating markets like Williamson County. The 2025 reappraisal showed an overall 52% increase in taxable property values, with residential properties rising approximately 62%. Between reappraisal years, your assessed value generally remains stable unless you make improvements to your property. When the county reappraises, they must calculate a certified tax rate designed to produce the same total revenue, which helps prevent windfall tax increases from appreciation alone.

What evidence do I need to win a property tax appeal in Williamson County?

To successfully appeal your Williamson County property assessment, you need strong comparable sales evidence showing similar homes in your area that sold for less than your assessed market value. The best comparables are homes sold within the past 6-12 months that are similar in size, age, condition, and location to your property. You should also bring photographs documenting any defects, needed repairs, or condition issues that would reduce your home's value. Professional appraisals, contractor repair estimates, and documentation of errors in your property record (such as incorrect square footage or features) also strengthen your case. The assessor uses mass appraisal techniques, so showing specific issues unique to your property can be particularly persuasive.

How much can I save by appealing my property taxes in Williamson County?

The potential savings from a successful property tax appeal in Williamson County depends on how much you can reduce your assessed market value. With Williamson County's 25% assessment ratio and approximately 0.40% effective tax rate, every $100,000 reduction in your home's market value saves you approximately $100 per year in property taxes. For example, if your home is valued at $800,000 and you successfully appeal to reduce it to $750,000, you would save about $50 annually. In high-value areas like Brentwood or Franklin, where home values can exceed $1 million, homeowners who are over-assessed by 10-15% could be overpaying by several hundred dollars per year, making an appeal worthwhile.

Can I appeal my Williamson County property taxes online?

For the initial County Board of Equalization appeal in Williamson County, you must call the assessor's office at (615) 790-5708 during the first week of June to schedule your hearing, there is no online filing system at the county level. However, you can request an informal review with the county assessor by calling the same number, which is the recommended first step. If you need to appeal to the Tennessee State Board of Equalization after an unfavorable county decision, that appeal can be filed online through the State Comptroller's website. The State Board's online filing system is available at comptroller.tn.gov and must be used within 45 days of receiving the County Board's decision.

What happens at a Board of Equalization hearing in Williamson County?

At your Williamson County Board of Equalization hearing, you will appear in person before the Board members to present your case for why your property assessment should be reduced. You'll have the opportunity to present your evidence, including comparable sales, photographs, appraisals, or documentation of errors in your assessment. The Board may ask questions about your property and evidence. The county assessor's office will also be present and may present their own evidence supporting the current assessment. After hearing both sides, the Board will deliberate and issue a written decision either upholding, reducing, or occasionally increasing your assessment. The entire process typically takes 15-30 minutes per case.

Am I eligible for the Tennessee Tax Relief program in Williamson County?

You may qualify for Tennessee's state-reimbursed Tax Relief program if you are age 65 or older, or totally and permanently disabled, with total household income (including your spouse) at or below $37,530 for 2026. The program provides reimbursement for taxes paid on the first $32,700 of your home's market value, which typically saves $130-$200 annually depending on local tax rates. Disabled veterans with 100% service-connected disability ratings qualify for relief on the first $175,000 of market value with no income limit, saving approximately $700-$1,000 per year. Applications must be filed by April 5 each year through the Williamson County Trustee's office, and you must own and occupy the property as your primary residence.

How is my Williamson County property tax calculated?

Williamson County property taxes are calculated using Tennessee's straightforward formula: your home's appraised market value × 25% assessment ratio × combined tax rate = your annual tax bill. For example, if your home is appraised at $750,000, your assessed value is $187,500 (25% of $750,000). This assessed value is then multiplied by the combined county and city tax rate, which averages about 0.40% effective rate in Williamson County, resulting in an approximate $3,000 annual tax bill. The 25% assessment ratio is set by the Tennessee Constitution and applies uniformly to all residential properties statewide. Your actual tax rate depends on where you live within the county, as cities like Franklin, Brentwood, and Spring Hill add their own municipal rates to the county rate.

Official Resources

Williamson County Assessor of Property Official Website →

Official county assessor website with information on assessments, appeals, exemptions, and reappraisal.

Williamson County Property Search →

Search and view your property assessment details, tax history, and property characteristics online.

Tennessee State Board of Equalization - Value Appeals →

File an appeal to the State Board of Equalization online if your county-level appeal is unsuccessful.

Tennessee Property Tax Relief Program →

Information on state tax relief programs for elderly, disabled, and veteran homeowners, including eligibility and application procedures.

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)

← All Tennessee property tax appeal info

Sources: https://www.williamsoncounty-tn.gov/64/Property-Assessor | https://www.williamsoncounty-tn.gov/388/Tax-Rolls-Appeals | https://propertytaxalmanac.com/tennessee/williamson/ | https://comptroller.tn.gov/boards/state-board-of-equalization/value-appeals.html | https://www.williamsoncounty-tn.gov/912/Purpose-of-a-Reappraisal | https://propertytaxexplorer.com/us/tennessee/williamson-county/ | https://comptroller.tn.gov/office-functions/pa/property-taxes/property-tax-programs/tax-relief.html

Last verified: 2026-07-24