Trinity County Property Tax
The average property-tax rate in Trinity County is about 1.04% of assessed value — the 1% Proposition 13 base levy plus each area's voter-approved debt. That's below the statewide average of about 1.11%, making it the 51st-highest of California's 58 counties (the 8th-lowest). On a $500,000 assessed value that's roughly $5,200 a year. Estimate your own bill below.
How Trinity County property tax is calculated
California taxes property under Proposition 13: your assessed value is generally set when you buy, then rises no more than 2% a year until the property changes hands or is newly built. The annual bill is that assessed value times the ad-valorem rate — the 1% base plus voter-approved bonds — which is why Trinity County's average works out to about 1.04%. Because the bonds differ by Tax Rate Area, two homes in the same county can pay slightly different rates.
What's on a property tax bill
Ad-valorem tax (1% base + voter-approved debt) · Mello-Roos special taxes, where a parcel is in a Community Facilities District · fixed direct assessments (lighting, sewer, etc.). Only the first is value-based; the 1.04% rate covers that part.
Learn the rules behind the rate: Proposition 13, Mello-Roos, and what triggers a reassessment.
Due dates & where to pay
Trinity County property taxes are paid in two installments: first due November 1 (delinquent after December 10) and second due February 1 (delinquent after April 10). A 10% penalty applies after each delinquency date. Pay or look up a parcel through the Trinity County Treasurer-Tax Collector.
These deadlines are set by California state law (Revenue & Taxation Code §§ 2605, 2606, 2617 and 2701) and are the same in every county — this is general education, not a county-by-county check. If a delinquency date falls on a weekend or legal holiday, it moves to the next business day. Always confirm the exact dates and amounts on your own tax bill and your county tax collector's website.
Ways to lower your bill
- The $7,000 Homeowners' Exemption for owner-occupants (~$70/yr).
- Senior programs — Property Tax Postponement (62+) and a Proposition 19 base-year transfer (55+).
- A Proposition 8 decline-in-value review if the market drops below your assessed value.
- Appealing your assessment if it looks too high.
Frequently Asked Questions
What is the property tax rate in Trinity County?
Trinity County's average property tax rate is about 1.04% of assessed value (California Board of Equalization, 2024-25) — the 1% Proposition 13 base levy plus each area's voter-approved debt. That's below the statewide average of about 1.11%. Your parcel's exact rate depends on its Tax Rate Area; Mello-Roos and fixed direct assessments, where they apply, are billed on top.
How much is property tax in Trinity County?
Multiply your assessed value by about 1.04%. On a $500,000 assessed value that's roughly $5,200 a year. Under Proposition 13 your assessed value is generally what you paid when you bought, rising no more than 2% a year — use the calculator above for your own number.
When are Trinity County property taxes due?
The first installment is due November 1 and delinquent after December 10; the second is due February 1 and delinquent after April 10. A 10% penalty applies after each delinquency date. These deadlines are set by California state law (Revenue & Taxation Code §§ 2605–2701) and are the same in every county; confirm the exact dates on your bill and the county tax collector's website.
How can I lower my Trinity County property tax?
Claim the $7,000 Homeowners' Exemption if you occupy the home; check the senior Property Tax Postponement and, if you're 55+, a Proposition 19 base-year transfer; if the market has fallen below your assessed value, request a Proposition 8 decline-in-value review; and appeal your assessment if it looks too high.
Official Trinity County offices
Look up your parcel, exact rate, and bill directly with the county:
- Trinity County Assessor — assessed value, exemptions, and parcel records.
- Trinity County Auditor-Controller — the tax-rate book and Tax Rate Areas.
- Trinity County Treasurer-Tax Collector — pay your bill and look up amounts due.
- Trinity County GIS / parcel data — maps and downloadable parcel layers.
Learn More
Rate source: California State Board of Equalization county-average property tax rate (2024-25) — total ad-valorem levies divided by net assessed value. This is a county average; your parcel's rate depends on its Tax Rate Area, and Mello-Roos or fixed direct assessments are extra. Educational estimate, not an official bill — confirm figures with the Trinity County Assessor and Treasurer-Tax Collector.