Sonoma County, CA property tax rate
Sonoma County · California · #30 of 56 in the state
Median annual property tax $5,695 · median home value $815,500
$5,695 a year · $475 a month using the area benchmark. Enter a value such as 350,000 or 350,000.00.
A rough planning estimate, not a tax quote.
Below the U.S. benchmark 0.94% (0.74×), about the same as the California benchmark 0.70%.
Ranked among 56 California counties with available benchmarks; 2 counties are not ranked because required figures are missing or reported as ranges.
What this benchmark means
Median real estate taxes paid ÷ median owner-occupied home value, ACS 2020–2024 — a ratio of two medians, not a statutory rate, not the median of individual bills and not your property's rate. Exemptions people already claim are reflected in the survey; your bill depends on taxable value, local districts, exemptions and reassessment after a sale.
Census figures behind this page
| Median real estate taxes paid | $5,695 |
|---|---|
| With a mortgage / without | $6,174 / $4,519 |
| Median home value | $815,500 |
| Median household income | $104,674 · tax is 5.4% of it |
| Median gross rent | $2,158 / mo |
| Owner-occupied | 63% of 190,998 homes |
| Population | 485,040 |
When it's due in California
All states| First installment | Due Nov 1 Late after Dec 10 under state law — the exact cutoff time, weekend/holiday carry-over and this year's date are on your bill. |
|---|---|
| Second installment | Due Feb 1 Late after Apr 10 under state law — the exact cutoff time, weekend/holiday carry-over and this year's date are on your bill. |
| Late penalty | 10% penalty on 1st installment after Dec 10 5pm; 10% penalty plus $10 cost on 2nd installment after Apr 10 5pm; 1.5%/month redemption fee after June 30 (Cal. Rev. & Tax. Code §§ 2617, 2618, 4103) |
| Appeal window | July 2 to September 15 (or November 30 depending on county notification) to Assessment Appeals Board (Cal. Rev. & Tax. Code § 1603) |
First installment delinquent after 5:00 p.m. Dec 10; second installment delinquent after 5:00 p.m. Apr 10. Default date June 30. Regular annual schedule; tax year: fiscal year July 1 - June 30, bills mailed Oct/Nov. Source: Cal. Rev. & Tax. Code §§ 2605, 2607, 2617, 2618, rules checked 2026-09-19. Confirm the amount and deadline on your official tax bill.
California counties with a similar rate
All 58How this benchmark was computed
Median real estate taxes paid by owner-occupied households in Sonoma County ($5,695) divided by the median value of those homes ($815,500), both from the Census Bureau's American Community Survey 2020–2024 5-year estimates. It is a ratio of two medians — a reasonable area benchmark, not the assessor's mill rate and not any one household's rate. Newly purchased homes are often reassessed to sale price, so a buyer's first bill can run above it. Data & method