Two houses on the same St. George street can carry very different property tax bills, even when they’re worth the same amount. The difference usually isn’t the neighborhood or the city. It’s how the home is used. St. George property taxes hinge on Utah’s primary residential exemption, a 45% break that applies to homes people actually live in, whether that person is the owner or a long-term tenant. Second homes and nightly rentals don’t get it.
How Utah’s primary residential exemption works
Utah taxes property based on its fair market value as of January 1. For residential property, state law then allows a 45% reduction in value (Utah Code 59-2-103). In practice, a qualifying home is taxed on 55% of what the assessor says it’s worth. A few limits come with it:
- One acre. No more than one acre of land per residential unit qualifies.
- 183 days. A home that becomes a residence partway through the year still qualifies if it’s used as a residence for 183 or more consecutive days that year.
- One per household. A household gets one exemption for its own primary residence. The same section carves out an exception for each property that is a tenant’s primary residence, which is what makes long-term rentals eligible.
“Primary residence” means the place where someone has established domicile. The Utah State Tax Commission’s rule lists the evidence assessors weigh, such as where you vote, register vehicles, file taxes, and send your kids to school (Utah Admin. Code R884-24P-52). The Washington County Assessor notes that claiming the exemption on your own home is also considered when deciding whether you’re domiciled in Utah for income tax purposes. That matters for out-of-state owners.
Long-term rentals can qualify
This is the part many investors miss. A single-family rental, condo, or duplex unit that a tenant lives in full time can receive the same 45% exemption as an owner-occupied home. The Tax Commission says properties inhabited by tenants qualify if the tenants live there for 183 consecutive days or more in a calendar year (Tax Commission residential exemption information sheet).
The residential property declaration
To get the exemption on a rental, every owner has to sign a written declaration, under penalty of perjury, that the property will be used as a tenant’s primary residence, on a form approved by the Tax Commission (Utah Code 59-2-103.5(5)). If the assessor wants more proof, the law sets the order:
- A current lease signed by the tenant.
- If the lease isn’t enough, a copy of the property’s insurance policy.
- If that still isn’t enough, a filing from your most recent federal tax return showing rental profit or loss.
The assessor may not contact your tenant for this information. The Tax Commission’s exemption page repeats both points. Washington County says owners must apply to receive the exemption and offers an online application, or a paper one at (435) 301-7020 (Washington County Assessor).
When a home changes hands, Utah has relied on a title-change declaration (Form TC-473D or a county version). The Tax Commission says new owners who receive one have 90 days to return it, followed by a second notice with 30 more days, and that the exemption can be removed if it never comes back (Tax Commission residential exemption FAQ).
A rule change starting January 1, 2027
Under 2026 Senate Bill 238, beginning January 1, 2027, owners must file Form TC-473A with the county board of equalization to receive or keep the exemption after any change in ownership, including a purchase, deed transfer, or transfer into a trust. The exemption doesn’t carry over to a new owner automatically, and the Tax Commission says late applications filed after September 15 can’t be accepted (Utah State Tax Commission). The version of Utah Code 59-2-103.5 that takes effect on that date makes the application mandatory statewide, not just in counties that adopt an ordinance.
Why short-term rentals and second homes don’t qualify
Utah’s definition of residential property for the exemption “does not include property used for transient residential use” (Utah Code 59-2-102(35)). Washington County spells it out: vacation homes, cabins, time-shares, and other transitory housing don’t qualify (Washington County Assessor). Elsewhere in state law, a short-term rental is a unit offered for fewer than 30 consecutive days (Utah Code 10-8-85.4).
A second home fails for a different reason: nobody uses it as a primary residence, and your household’s single exemption is already on the home you live in. The Tax Commission says plainly that a second home or vacation home can’t claim it (Utah State Tax Commission). Both are taxed on 100% of market value. If you’re weighing a nightly rental, our guide to St. George short-term rental rules covers where they’re even allowed.
What it means for cash flow: an example
Here’s how the exemption plays out on a typical St. George home. This is an illustration, not a quote for any specific property.
- Home value: $516,153, Zillow’s average St. George home value as of September 30, 2026 (Zillow Home Value Index). Your assessed market value will be different.
- Tax rate: 0.006596, the 2026 rate for the St. George City tax area (Washington County 2026 tax rates). Hurricane City’s rate is 0.007590, and parcels in special districts can be higher.
Long-term rental or owner-occupied (exemption applies)
$516,153 x 55% = $283,884 taxable value. $283,884 x 0.006596 = about $1,872 a year, or roughly $156 a month.
Nightly rental or second home (no exemption)
$516,153 x 0.006596 = about $3,405 a year, or roughly $284 a month.
The difference
That’s about $1,532 a year, or $128 a month, on the same house. Zillow puts the average St. George rent at $1,895 a month as of October 25, 2026 (Zillow Rental Manager). By our math, the lost exemption equals about 81% of one month’s rent, every year. For a cash-flow investor working with thin margins on a long-term rental, that’s often the gap between a property that pays you and one you feed.
If you’re comparing a nightly rental to a long-term lease, put the full non-exempt tax bill in the nightly column.
Truth in Taxation and the tax-year calendar
Rising values don’t automatically mean a bigger bill in Utah. Each year the state calculates a “certified tax rate” for every taxing entity, which is the rate that would bring in the same property tax revenue the entity budgeted the year before (Utah Code 59-2-924). New construction adds revenue on top of that. An entity that wants more must give notice and hold a public hearing before adopting a higher rate (Tax Commission: property tax increases). Those hearings must start at or after 6 p.m. (Utah Code 59-2-919).
Here’s the calendar that matters to owners:
- January 1: The date your property is valued (Utah Code 59-2-103).
- By July 22: The county auditor mails the Notice of Property Valuation and Tax Changes. It shows market value, taxable value, last year’s tax, this year’s estimated tax, hearing dates for any proposed increase, and how to appeal (Utah Code 59-2-919.1).
- September 15, or 45 days after the notice, whichever is later: The deadline to appeal your valuation to the county board of equalization (Utah Code 59-2-1004).
- Around the start of November: Tax notices arrive, according to the Tax Commission.
- November 30: Property taxes are due. A late payment carries a penalty of 2.5% or $10, whichever is greater (Utah Code 59-2-1331). The Washington County Treasurer notes taxes are due even if your notice never arrives (Treasurer FAQ). This year, November 30 falls on a Monday.
The valuation and exemption deadlines for 2026 have passed, but your 2026 tax notice should be arriving now. It’s a good time to confirm each property’s taxable value is 55% of market value if it should be.
Frequently asked questions
Does my St. George rental get the 45% exemption automatically?
Not necessarily. Washington County requires owners to apply, and rentals need a signed declaration from every owner. If your tax notice shows taxable value equal to market value, the exemption isn’t applied.
What if my rental sits vacant between tenants?
The test is use as a tenant’s primary residence for 183 or more consecutive days in the year. If a vacancy runs long, ask the assessor how it affects your property.
Do I need to tell the county if my home stops being my primary residence?
Yes. Utah Code 59-2-103.5(7) requires a written statement to the county board of equalization, plus a declaration on your Utah income tax return, unless you’re simply moving to another primary residence that also qualifies.
Buying a rental or a home in St. George?
Property taxes are one of the easiest expenses to estimate wrong, and one of the few you can’t negotiate after closing. If you’re running numbers on a St. George or Hurricane rental, or deciding between a long-term lease and a nightly rental, reach out to Axiom Properties. If you’re already a landlord, our guide to St. George security deposit rules covers another set of rules worth knowing.
This article is general information, not legal or tax advice. Confirm details with the Washington County Assessor, the Utah State Tax Commission, or a licensed tax professional.
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