Hamilton County Property Tax Guide

Post-reappraisal 2025 rates, the 25% assessment ratio, and the single decision — city vs. county — that changes your bill more than anything else.

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How Tennessee calculates your bill

Tennessee doesn’t tax your home’s full appraised value. Residential property is assessed at 25% of appraised value, and the tax rate is then applied per $100 of that assessed value. So the formula is:

Appraised value × 25% = assessed value.
Assessed value ÷ 100 × (combined rate) = annual tax.

The “combined rate” is where location matters: an unincorporated property pays only the county rate, while a property inside a city pays the county rate plus that city’s rate.

2025 certified rates

Taxing authority2025 rate (per $100 assessed)
Hamilton County (applies everywhere)$1.5157
City of Chattanooga (in-city only)$1.93
Combined, in-city Chattanooga$3.4457
Unincorporated (county only)$1.5157

Other Hamilton County municipalities — Collegedale, East Ridge, Red Bank, Soddy Daisy, Lakesite, Ridgeside, Signal Mountain, Walden — each set their own city rate on top of the county rate. Each town adopts its rate annually, so for any of these, ask the town (or the Trustee) for that city’s current adopted rate specifically rather than relying on a published list.

Certified rate vs. adopted rate — the trap in old articles. After the 2025 reappraisal, the State Comptroller published a revenue-neutral certified City of Chattanooga rate of $1.55. You’ll still find that figure in mid-2025 news coverage. But the City Council then voted (5–4, final reading September 9, 2025) to adopt a higher rate of $1.93 — above the certified rate, but still well below the old $2.25. The City’s own tax page now lists $1.93 as the current rate. If you budget from the $1.55 certified number you’ll understate your in-city bill by about 25%. Always budget from the adopted rate ($1.93 city + $1.5157 county for 2025), and re-check after each year’s budget vote.

What the rates mean in dollars

Appraised valueIn-city Chattanooga (~0.86%)Unincorporated (~0.38%)
$300,000~$2,584~$1,137
$400,000~$3,446~$1,516
$600,000~$5,169~$2,274

That gap — roughly 2.3× — is the most important number in Chattanooga real estate for a cost-conscious retiree. Black Creek is in-city; Ooltewah (Stonebrook, Oakbrook) is unincorporated.

Ignore any tax bill dated before 2025. Tennessee reappraises every four years. The 2025 reappraisal moved valuations from a January 1, 2021 basis to January 1, 2025 — and county-wide values rose on the order of 40%. By state law a reappraisal must be revenue-neutral, so the certified tax rates dropped to offset the higher values (the City of Chattanooga rate fell from $2.25 to $1.93, for example). The practical takeaways: (1) a seller’s old tax bill drastically understates what you’ll pay; (2) budget from the current appraised value and the 2025 rates above, not from history.

Seniors: don’t leave relief on the table

Tennessee has two separate programs that can cut or cap a senior’s bill — the state Tax Relief program and a local Tax Freeze. They have different rules and income limits, and the City of Chattanooga and Hamilton County treat the freeze differently. We break both down here: TN senior Tax Relief & Tax Freeze guide →

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