Alameda County, CA Property Tax: $8,061/yr (2026)
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The effective property tax rate in Alameda County is 0.76% of assessed home value. On a home at the county median value of $1,057,400, that works out to about $8,036 per year, or $670 per month. Alameda County is located in central California, and is home to approximately 1,651,949 residents.
About Alameda County
Alameda County covers approximately 737.5 square miles in California. The county is home to about 1,651,949 residents living in roughly 630,726 housing units, of which 50.8% are owner-occupied. The median household income is $126,240, and the median home was built in 1969.
Alameda County borders Contra Costa County, San Francisco County, San Joaquin County, San Mateo County, Santa Clara County — useful comparisons if you're considering nearby areas with potentially different tax rates.
How Property Taxes Work in California
Property taxes in California are administered at the county level. Each county sets a millage rate applied to the assessed value of real property — the effective rate above accounts for any partial assessments and exemptions already built into the local tax base. Assessed value can differ meaningfully from current market value depending on how often the county reassesses and what fraction of market value it uses.
Most counties in California offer exemptions that reduce the taxable assessed value: homestead exemptions for primary residences, senior exemptions, disability exemptions, and veteran exemptions are common. These reduce your effective rate below the county-wide average shown here. Contact the Alameda County Assessor's office to learn which exemptions apply to your property and when to file.
Alameda County vs. Neighboring Counties
| Location | Eff. Rate | Median Home | Annual Tax |
|---|---|---|---|
| Alameda County, CA | 0.76% | $1,057,400 | $8,036 |
| California state average | 0.71% | — | $7,508* |
| Contra Costa County | 0.83% | $830,800 | $6,903 |
| San Francisco County | 0.68% | $1,380,500 | $9,412 |
| San Joaquin County | 0.76% | $494,500 | $3,782 |
| San Mateo County | 0.61% | $1,494,500 | $9,167 |
| Santa Clara County | 0.71% | $1,382,800 | $9,766 |
| US national average | 1.10% | $281,900 | $3,101 |
*State average annual tax computed at Alameda County's median home value of $1,057,400. Source: US Census ACS 2023 5-year estimates.
Frequently Asked Questions
How does Alameda County's property tax rate compare to the rest of California?
At 0.76%, Alameda County is higher than the California state average of 0.71%. On a home at the county median of $1,057,400, that means about $8,036 per year — versus $7,508 at the state average rate, a difference of $528 per year. Compared to the national average of 1.10%, Alameda County is below average.
What's a typical annual property tax bill in Alameda County?
For a home at the county median value of $1,057,400, the annual property tax in Alameda County is approximately $8,036 — or about $670 per month. For a home worth $1,586,100, expect around $12,054 per year. For a $2,114,800 home, approximately $16,072 per year. Use the calculator above to estimate taxes for any assessed value.
Where do I appeal a Alameda County property tax assessment?
Property assessment appeals in Alameda County are handled by the Alameda County Assessor's office. Most jurisdictions require filing within 30–90 days of receiving your assessment notice — confirm the specific deadline with the assessor's office before submitting, as deadlines and procedures vary by county. A successful appeal can reduce your assessed value and lower your tax bill for the current and future tax years.
What exemptions are available in Alameda County?
California counties commonly offer homestead exemptions for owner-occupied primary residences, senior citizen exemptions for qualifying homeowners aged 65 and older, exemptions for disabled residents, and veterans' exemptions. Each exemption reduces your assessed taxable value, which in turn reduces your effective tax rate below the county-wide 0.76% shown here. Contact the Alameda County Assessor's office to confirm which exemptions are available and the application deadlines.
Data sources: US Census Bureau ACS 2023 5-Year Estimates, US Census Gazetteer (2024), County Adjacency File