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Last updated: October 30, 2026. Figures come from the official sources linked in each section; rules change, so confirm with the agency before you rely on them.
"Washington County Utah property taxes" is a top search for buyers and new owners. Here's how it works, straight from the county and the state.
The 45% primary residential exemption
Utah law gives a primary residence a 45% exemption, so it is taxed on 55% of fair market value (Utah Code 59-2-103). It covers the home and up to one acre of land, requires the home to be someone's primary residence for 183 or more consecutive days in the year, and is limited to one per household. Owner-occupied homes and full-time rentals can qualify; vacation homes, cabins and time-shares do not (Washington County Assessor).
How to estimate your bill
The county lists four steps: market value, the assessment ratio (55% for a primary residence, 100% otherwise), any exemptions, and the tax rate for your area (Assessor FAQ). The county's own example:
| Primary residence | Second home | |
|---|---|---|
| Market value | $350,000 | $350,000 |
| Taxable value | $192,500 | $350,000 |
| Tax at an example 1.1% rate | $2,117.50 | $3,850 |
Rates differ by school district, city and special districts, and they aren't set by the assessor. Use the county's tools to look up your actual rate.
New for 2027: when you must file a form
Starting January 1, 2027, owners must file Form TC-473A with the County Board of Equalization to get or keep the exemption after any change of ownership (including deed or trust transfers), if the property didn't qualify the prior year, or if the county has reason to believe it no longer qualifies. Applications are due on or before September 15, and late filings can't be accepted. Homes under construction use Form PT-24 instead (Utah State Tax Commission).
Who to call
Washington County Assessor, 111 East Tabernacle, St. George, UT 84770, (435) 301-7020.
Related: cost of living, Washington County real estate, Ivins City meetings (where city budgets are discussed).
Buying a second home or a rental? I can help you understand how the exemption affects your numbers before you write an offer. Reach out to Robert at Robert@OwnUtah.com or 801-737-3333.
Frequently asked questions
How much are property taxes in Washington County, Utah?
It depends on value and your area's rate. A primary residence is taxed on 55% of market value. The county's example: a $350,000 home at a 1.1% rate pays about $2,117.50 as a primary residence and $3,850 as a second home.
Who qualifies for the Utah primary residential exemption?
A home that is the primary residence of the owner or a full-time tenant for at least 183 consecutive days in the year. It covers up to one acre and is limited to one per household.
Do I need to file to keep my exemption after buying?
Starting January 1, 2027, yes: after any change in ownership you must file Form TC-473A with the County Board of Equalization by September 15.