What happens to property tax when you buy in Sonoma County, California?
Why your bill can jump at purchase
California uses an acquisition-value basis (California Proposition 13 (BOE)): your assessed value is set at purchase and grows under an annual cap of 2%.
Current owners here pay a typical bill of about $5,695/yr (on the $815,500 county-median home).
Estimated bill by your purchase price
| Purchase price | Estimated annual tax | vs typical bill |
|---|---|---|
| $815,500 | $5,695/yr | +$0/yr |
| $1,019,375 | $7,118/yr | +$1,423/yr |
| $1,223,250 | $8,542/yr | +$2,847/yr |
Effective rate: 0.7% · Tier 1 · Confidence: Medium. Reassessment toward the sale price modeled from the jurisdiction's assessment basis.
How Sonoma County compares before reassessment
Sonoma County ranks 30 of 58 published California counties by effective property-tax rate.
The county's 0.7% effective rate is 0 percentage points below the California published-county average of 0.7%.
The $815,500 median home value ranks 14 of 58 and is $334,400 above the California county median of $481,100.
Similar-rate counties
- El Dorado County: 0.7% effective rate; $679,900 median home value
- San Bernardino County: 0.7% effective rate; $505,000 median home value
- Madera County: 0.7% effective rate; $393,200 median home value
Source, method & confidence
Data as of 2024-12-31 (data version 2024.1).
Sources: U.S. Census Bureau, American Community Survey (ACS) 5-year, table B25103; U.S. Census Bureau, American Community Survey (ACS) 5-year, table B25077; California State Board of Equalization, Proposition 13.
How we model reassessment (methodology) · California reassessment guide · Sonoma County property tax overview