What happens to property tax when you buy in Alameda 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 $8,474/yr (on the $1,090,100 county-median home).
Estimated bill by your purchase price
| Purchase price | Estimated annual tax | vs typical bill |
|---|---|---|
| $1,090,100 | $8,474/yr | +$0/yr |
| $1,362,625 | $10,593/yr | +$2,119/yr |
| $1,635,150 | $12,712/yr | +$4,238/yr |
Effective rate: 0.78% · Tier 1 · Confidence: Medium. Reassessment toward the sale price modeled from the jurisdiction's assessment basis.
How Alameda County compares before reassessment
Alameda County ranks 6 of 58 published California counties by effective property-tax rate.
The county's 0.78% effective rate is 0.08 percentage points above the California published-county average of 0.7%.
The $1,090,100 median home value ranks 5 of 58 and is $609,000 above the California county median of $481,100.
Similar-rate counties
- Riverside County: 0.78% effective rate; $557,300 median home value
- Imperial County: 0.77% effective rate; $309,600 median home value
- Alpine County: 0.77% effective rate; $590,200 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 · Alameda County property tax overview