What happens to property tax when you buy in Contra Costa 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 $7,156/yr (on the $866,800 county-median home).
Estimated bill by your purchase price
| Purchase price | Estimated annual tax | vs typical bill |
|---|---|---|
| $866,800 | $7,156/yr | +$0/yr |
| $1,083,500 | $8,945/yr | +$1,789/yr |
| $1,300,200 | $10,734/yr | +$3,578/yr |
Effective rate: 0.8256% · Tier 1 · Confidence: Medium. Reassessment toward the sale price modeled from the jurisdiction's assessment basis.
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) · Contra Costa County property tax overview