The 45% residential exemption, the real effective rate, the Circuit Breaker for seniors — and worked examples at every major St. George price point.
Most buyers arrive in St. George expecting property taxes to work the same way they do back home. They don't. Utah has a specific mechanism that makes the math here materially different — and almost universally better for buyers coming from California, the Pacific Northwest, Colorado, or any state with an effective rate above 0.5%.
Here's the mechanism: Utah taxes owner-occupied primary residences on only 55% of market value. The remaining 45% is excluded from the assessed base before any rate is applied. This is called the residential exemption, and it applies automatically to primary homes — you apply once with the county assessor.
The 0.37% figure cited as the "effective rate" is the result after the residential exemption is applied to the median home. The statutory millage rate in most St. George ZIP codes runs approximately 0.67% — but because it's applied to 55% of market value, the effective rate on purchase price is roughly 0.37%. This is the number that matters for budget planning.
The 45% residential exemption is only available for primary residences. If you're buying a St. George home as a second home or seasonal property, you're assessed on full market value — and your effective rate is closer to 0.67%, not 0.37%. The difference on a $500K home is approximately $1,600/year. Verify your intended use before assuming the lower rate applies.
Below is the property tax math at purchase prices that correspond to the major 55+ communities in the market. All figures use Washington County's median effective rate of 0.37% after residential exemption.
| Purchase Price | Market Value × 55% | Assessed Value | Annual Tax | Monthly Tax | Typical Community |
|---|---|---|---|---|---|
| $300,000 | $165,000 | $165,000 | $1,111 | $93 | SunRiver Villas (entry) |
| $400,000 | $220,000 | $220,000 | $1,480 | $123 | SunRiver St. George (median) |
| $500,000 | $275,000 | $275,000 | $1,850 | $154 | SunRiver / Brio |
| $600,000 | $330,000 | $330,000 | $2,220 | $185 | Firelight / Brio upper |
| $750,000 | $412,500 | $412,500 | $2,776 | $231 | Entrada mid-range |
| $1,000,000 | $550,000 | $550,000 | $3,700 | $308 | Entrada / Regency upper |
| $1,500,000 | $825,000 | $825,000 | $5,550 | $463 | Entrada estate tier |
Figures use 0.37% effective rate applied to 55% of market value. Actual bills vary by ZIP code (84770 vs 84790 differ slightly due to school district levies). Verify with Washington County Assessor before purchase.
This is where the math gets worth doing carefully. The comparison below uses a $500,000 home in each market — the approximate median SunRiver price point — showing what a buyer pays in annual property taxes across the top 55+ markets competing for the same buyer.
| Market | St. George, UT | Scottsdale, AZ | Las Vegas, NV | Sarasota, FL |
|---|---|---|---|---|
| Effective rate | 0.37% | ~0.55% | ~0.60% | ~0.80% |
| Annual tax on $500K home | ~$1,850 | ~$2,750 | ~$3,000 | ~$4,000 |
| Monthly tax cost | ~$154 | ~$229 | ~$250 | ~$333 |
| 10-year tax savings vs. Sarasota | ~$21,500 | ~$14,500 | ~$10,000 | — |
| CDD possible? | No | Rare | No | Common |
Florida comparison excludes CDD assessments, which commonly add $100–$400/month in new 55+ communities. With CDD, the savings gap vs. St. George widens further. All figures approximate — verify in each jurisdiction.
A St. George buyer at $500K saves approximately $2,150/year vs. a Sarasota buyer at the same price point — before factoring in Florida's frequent special assessments, CDD debt service, and hurricane insurance premiums. Over 10 years at a conservative $2,000/year savings, that's $20,000 in retained wealth just from the property tax differential. This is real money that doesn't show up in a listing price comparison.
Utah has a property tax relief program called the Circuit Breaker that most buyers — and many agents — have never heard of. Here's how it works:
The Circuit Breaker is a refundable credit, which means if you qualify, Utah will effectively pay back a portion of your property taxes. For a retired couple living on Social Security and a small pension — total income under ~$42K — this can meaningfully reduce the net annual property tax bill. Most buyers in this income range don't know to apply.
The ~$42,623 household income cap means most buyers in SunRiver or Entrada won't qualify — these communities attract buyers with IRAs, pensions, and investment income that pushes them above the threshold. But buyers in SunRiver Villas, West Springs Townhomes, or Winterhaven — where price points are lower and buyer income profiles more moderate — may absolutely qualify. Check your situation with a tax professional before filing.
The 45% residential exemption is not automatic. You must apply with the Washington County Assessor's office. The key facts:
Buyers closing in late spring or summer often miss the March 1 deadline for that calendar year, meaning they pay full assessed value for the remainder of the year. Build this into your closing timing if it matters for your first-year budget.
This guide covers the residential property tax structure for primary homeowners in Washington County. It does not cover:
All figures in this guide should be verified with the Washington County Assessor and a licensed tax professional familiar with Utah law before purchase. Tax rates, exemption thresholds, and Circuit Breaker income limits change annually.
Property tax is one part of the monthly equation. Our St. George partner agent can walk you through the full all-in cost — HOA, tax, insurance, and any community-specific assessments — for any community you're evaluating.
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