Alameda County Property Tax Calculator
Alameda County property tax runs on Proposition 13 like the rest of California: the Alameda County Assessor pegs your assessed value to the price you paid, and that figure can only grow by a capped amount each year unless the home is sold or substantially remodeled. Because the cap only resets at those trigger events, an owner's tenure in the home matters at least as much as the neighborhood when it comes to what they actually owe. Above, pick Alameda County from the dropdown and enter a home value for a projected figure.
Annual Property Tax
$8,317Monthly (Escrow)
$693Effective Rate
0.76%Alameda County's effective rate (0.76%) is 9% higher than the California average (0.70%).
Edit inputs ↑Alameda County Effective Rate
0.76%
Vs. California Average
9% higher
California National Rank
#32 of 51
1 = highest statewide rate
County Median Home Value
$1,090,100
Estimated Annual Tax (Median Home)
$8,317
Monthly Equivalent
$693
Property tax in Alameda County, California
- The Alameda County Assessor sets assessed value at purchase, with Proposition 13 limiting annual growth from that baseline.
- Ownership changes and completed new construction both trigger reassessment to current market value.
- An owner-occupied home whose assessed value looks too high can be taken to the county assessment appeals board through a formal filing within the annual period.
- A primary residence occupied by its owner can claim the homeowners' exemption, pulling taxable value down beyond the Proposition 13 limit.
Other large California counties
Effective rate = aggregate real-estate taxes paid ÷ aggregate home value (ACS 2024 5-year).
| County | Effective Rate | Median Home Value |
|---|---|---|
| Los Angeles County | 0.67% | $834,200 |
| San Diego County | 0.67% | $854,700 |
| Orange County | 0.64% | $962,600 |
| Riverside County | 0.83% | $557,300 |
| San Bernardino County | 0.73% | $505,000 |
| Santa Clara County | 0.68% | $1,490,600 |
| Sacramento County | 0.76% | $534,200 |
| Contra Costa County | 0.78% | $866,800 |
| Kern County | 0.89% | $338,300 |
| Imperial County | 0.83% | $309,600 |
See property tax across every county in California at the California property tax calculator , or check your California income tax with the California income tax calculator .
Frequently asked questions
How is property tax calculated in Alameda County?
The county assessor pins an assessed value to Proposition 13's purchase-price baseline and capped annual growth, then your local tax rate area bills against that figure rather than against current market value. This is why identical homes bought at different times can owe noticeably different amounts.
How do I appeal my Alameda County assessment?
Formal appeals go to the county assessment appeals board and must be filed before the annual cutoff; missing that deadline generally means waiting for the next cycle. Talking things over with the assessor's office ahead of time can sometimes settle a disagreement without a hearing.
Does Alameda County offer a homestead exemption?
Yes — California's homeowners' exemption is available on an owner-occupied home, cutting the taxable figure beyond whatever separate cap Proposition 13 already places on annual growth.
Does buying a home in Alameda County reset my property tax?
It does — a change in ownership resets your assessed value to the purchase price, replacing whatever capped, potentially much lower value the previous owner had built up over their years in the home. From that new baseline, Proposition 13's annual growth cap applies again going forward.
Sources
Related insights
Use these guides for rule explanations, planning context, and follow-up questions beyond the calculator result.