In Brentwood, your property tax follows Williamson County's appraisal of the parcel, not the price you pay. Homes are selling at a $1,349,357 median, 3.6% lower than a year ago and at 97% of list price (all homes, 90 days ending 2026-09-30). None of that discount reaches your tax bill until the county's next reappraisal.

The number to check before you offer is the parcel's current appraised value times the combined county-plus-city rate, not the listing's estimated taxes line. The local assessment ratio applies to that appraised value, and that product is what your first-year holding costs will be.

 

Key Takeaway

Your Brentwood tax bill comes from Williamson County's appraised value of the parcel, not the price you pay. Before any offer, pull that appraisal and apply the combined county-plus-city rate. Single-family prices are 3.3% lower than a year ago, but that won't shrink the bill until the next countywide reappraisal. If you want a lower bill sooner, the routes are an appraisal appeal or, for eligible owners, Tennessee's tax relief and Williamson County's freeze programs.

 

Who This Guide Is For

This guide is for anyone buying or already owning a home in Brentwood who needs to work out the yearly property tax bill and find ways to lower it.

 

How Property Taxes Work in Brentwood, TN

A Brentwood homeowner gets two bills: one from Williamson County and one from the City of Brentwood. Each is figured as the appraised value multiplied by the residential assessment ratio, then multiplied by the rate per $100 of assessed value. The Williamson County Trustee's official 2025 rate table lists the City of Brentwood's property tax rate at $0.19 per hundred dollars of assessed value. The city equalized to this rate, down from $0.29, following the 2025 countywide reappraisal.

For the bigger picture, see Brentwood Housing Market.

The county rate makes up the larger share of the total obligation. For tax year 2025, the Williamson County Trustee's official rate table lists the county-only property tax rate at $1.30 per hundred dollars of assessed value, which applies on top of the city rate. Because Brentwood sits entirely within Williamson County, Metro Nashville and Davidson County rates or calculators don't apply here.

Tennessee taxes only a fraction of a home's total value. Per the Tennessee Comptroller of the Treasury, residential real property has a state-law assessment ratio of 25%. The combined rate is applied only to that assessed fraction, not the full appraised value.

 

How to Calculate Property Tax on a Brentwood Home

To find the annual property tax on a Brentwood home, multiply the county's appraised value by the residential assessment ratio to get the assessed value, divide by 100, and multiply by the combined county and city rate. The appraised value on the parcel record is the input, not the list or sale price.

The single-family median sale price in Brentwood is currently $1,424,432 (90 days ending 2026-09-30). Using this figure as an illustrative appraised value shows how the math works for a typical house in the area.

Example: Property Tax on a Median-Priced Brentwood House

On a Brentwood house appraised at the single-family median, the county taxes only a quarter of the value. Multiplying that median by the assessment ratio yields an assessed value of $356,108.

Divide the $356,108 assessed value by 100 to get 3,561.08. Multiply that by the county rate to get a county bill of about $4,629, and by the city rate to get a city bill of roughly $677. The combined yearly property tax is approximately $5,306, which breaks down to about $442 a month for an escrow account.

One important caveat: this example uses a sale price, but your bill uses the county's appraised value from the last reappraisal, which can sit well above or below what a house sells for today. Run the same math on the parcel's own appraised value before relying on any estimate.

 

Why the Purchase Price Doesn't Set Your Brentwood Tax Bill

According to the Tennessee Comptroller of the Treasury, between reappraisals the Assessor's appraisals generally remain constant. Reassessment occurs only when the property itself has physically changed, such as through new buildings, additions, or demolitions. A sale or transfer of ownership alone doesn't trigger a reassessment.

That structure creates a specific situation for buyers right now. All-home prices are down year over year, and homes are selling below list price. There's room to negotiate the purchase price, but that negotiated discount doesn't reach your tax bill. Your first bills will look like the seller's bills, paying cash or financing.

Williamson County reappraises property on a four-year cycle. The prior reappraisal occurred in 2021, and the most recent cycle began and was completed in 2025. Following the 2025 countywide reappraisal, Williamson County's certified, revenue-neutral rate was set at $1.30 per hundred dollars of assessed value. The City of Brentwood equalized to its own certified rate, marking its 35th consecutive year without an effective rate increase.

Ask the listing agent whether the listing's estimated taxes line represents the seller's actual bill, and whether it includes both the county and city bills.

 

Brentwood Housing Market at a Glance

These are recent sale figures from the local market, not appraised values for tax purposes.

  • Median sale price, all homes: $1,349,357, down 3.6% year over year (90 days ending 2026-09-30)
  • Median sale price, single-family homes: $1,424,432, down 3.3% year over year (90 days ending 2026-09-30)
  • Median sale price, townhouses: $382,455, down 9.8% year over year (90 days ending 2026-09-30; based on only 10 townhouse sales, so treat as a rough guide)
  • Median price per square foot: $358 for single-family homes, $221 for townhouses (90 days ending 2026-09-30; townhouse figure based on 10 sales)
  • Sale-to-list ratio, all homes: 97%, with 8.3% of homes selling above list (90 days ending 2026-09-30)
  • Median days on market, all homes: 61 (90 days ending 2026-09-30)
  • Months of supply, all homes: 4.9, with 333 homes in inventory (90 days ending 2026-09-30)

 

How to Look Up a Brentwood Property Tax Record

The Williamson County, Tennessee Property Assessor's official online parcel search is hosted at inigo.williamson-tn.org, a subdomain separate from the main county website. You can look up any Brentwood parcel by owner, address, or account number to find the current appraised and assessed value. Pull those numbers before making an offer.

Once you have the assessed value, check the Williamson County Trustee for the county bill history and the City of Brentwood for the city bill. Compare last year's actual bills against the listing's estimate to see if they match.

You should also ask whether the seller's bill reflects a tax freeze or relief credit that ends when the home changes hands. If the current owner receives a senior or veteran discount, that reduction disappears after closing, leaving you with the full unadjusted bill.

 

Property Taxes on New Construction and Renovated Homes in Brentwood

Under T.C.A. § 67-5-603, when new construction or an improvement is completed between January 1 and September 1 of a tax year, the assessor must issue a prorated, or picked-up, assessment for the remainder of that year. A new building is deemed complete for assessment purposes when the property is conveyed to a bona fide purchaser, or when the building has been occupied or is suitable for occupancy.

A buyer budgeting from the current bill on a new build can underestimate the first full year by a wide margin. If you're buying new construction, ask the builder whether the current bill covers the land only and when the finished home will be assessed.

Homeowners association dues and any pending special assessments are billed separately from property taxes. Ask the HOA for current dues, as these add to your monthly carrying costs alongside the county and city tax bills.

 

Ways to Lower Your Brentwood Property Tax Bill

In Tennessee, property owners who disagree with their assessor's valuation first pursue an informal review with the county Assessor of Property, then may file a formal appeal with the County Board of Equalization while it's in session. If dissatisfied with the county board's decision, the taxpayer may appeal further to the State Board of Equalization. Under T.C.A. § 67-5-1412(e), an appeal to the state board must be filed on or before August 1 of the tax year, or within 45 days of the date notice of the county board action was sent.

The appraisal, not the tax rate, is what an owner can challenge. With homes selling at a discount to list price, recent closed sales are the evidence that matters, but only if they fit the county's valuation date. Brianna Morant can pull comparable Brentwood sales for owners weighing an appeal or evaluating a home for a potential sale.

Tennessee also offers relief programs. Per Williamson County's official Tax Year 2026 Tax Relief brochure, the state Property Tax Relief Program assists eligible elderly or disabled homeowners who own and use the property as a primary residence. Separately, the official brochure confirms Williamson County has approved the Property Tax Freeze program, so homeowners qualifying for the program will have the property taxes frozen for their primary residence.

 

Brentwood, TN Property Tax FAQs

How Much Is Property Tax on a $400,000 House in Brentwood, TN?

A Brentwood home appraised at $400,000 carries a yearly tax of $1,490. That appraised value sits near the townhouse market, where the median sale price was $382,455 (90 days ending 2026-09-30, based on 10 townhouse sales). The parcel's appraised value from the county, not the purchase price, dictates the final bill.

Do People over 65 Pay Property Tax in Brentwood, TN?

Yes, Tennessee has no blanket age-based property tax exemption. Eligible owners can get partial relief through the state Property Tax Relief program and can lock their taxes through Williamson County's Property Tax Freeze. To qualify for either in tax year 2026, applicants must be 65 or older, use the property as a primary residence, and meet 2025 income limits: $38,470 for the state relief program and $69,150 for the county freeze program.

Who Gets the $6,000 Tax Break for the Elderly?

That figure is a federal income-tax deduction for people 65 and older, not a Tennessee or Brentwood property tax break. Per the IRS, effective for tax years 2025 through 2028, individuals age 65 and older may claim an additional $6,000 deduction, which phases out for taxpayers with a modified adjusted gross income over $75,000, or $150,000 for joint filers. For local property tax reductions, homeowners should look to the state relief and county freeze programs instead.

Is Brentwood Part of Nashville for Property Taxes?

No, Brentwood is a separate city located in Williamson County. Property tax bills come from Williamson County and the City of Brentwood, meaning Metro Nashville and Davidson County rates don't apply. You'll use the Williamson County Property Assessor at inigo.williamson-tn.org to find values, the County Trustee for county bills, and the City of Brentwood for city bills.

Why Are Property Taxes in Brentwood Lower than in Many Other States?

Tennessee assesses residential property at a ratio of 25%, meaning only a quarter of a home's appraised value is subject to taxation. Because the combined rate applies to just that quarter of the appraisal, the effective tax burden remains lower than in areas that tax the full market value.

How Do Brentwood Property Taxes Compare with Other Williamson County Cities?

Every Williamson County owner pays the same county rate for 2026, so the difference between cities comes down to the municipal rate. Brentwood's combined rate is $1.49 per hundred dollars of assessed value. Nolensville's combined rate is $1.64, Spring Hill's is $2.009, and Franklin's is $1.566 outside the Franklin Special School District, or $2.2433 inside the district.

When Are Property Taxes Due in Brentwood, TN?

Under Tennessee's statewide property tax payment rule, February 28 is the last day to pay the preceding year's taxes without interest. Taxes become delinquent beginning March 1 of the following year. This schedule applies to all counties, including the Williamson County and City of Brentwood bills.

Are Property Taxes Prorated at Closing in Tennessee?

Yes, Tennessee property taxes are billed and paid in arrears, meaning they're typically prorated between the buyer and seller at closing. The Tennessee Realtors Purchase and Sale Agreement provides that taxes for the calendar year in which the sale closes shall be prorated as of the closing date. If the final tax rate for the current year hasn't yet been set, the prior year's tax rate and assessment are used to calculate the proration.

 

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