Alameda County Property Tax Calculator (2026)
The Alameda County median effective property tax rate is 0.76% for 2026 (U.S. Census Bureau ACS 2024), 0.06% above the California median of 0.7%. On a $400,000 home that is about $3,040 a year (~$253 a month). Alameda County property is assessed by the Alameda County Assessor. Enter your home value below for an instant estimate.
What is the Alameda County property tax rate in 2026?
Alameda County's median effective property tax rate is 0.76% (U.S. Census Bureau ACS 2024). The county median home is $1,090,100 with a median tax of about $8,474.
How much is property tax on a $400,000 home in Alameda County?
About $3,040 a year, or roughly $253 a month, at the 0.76% median effective rate before exemptions.
Who handles property tax in Alameda County?
The Alameda County Assessor sets your assessed value. The Alameda County Treasurer-Tax Collector collects the bill. Appeal by File a regular assessment appeal between July 2 and September 15.
When are Alameda County property taxes due?
Two installments: the first is due November 1 (delinquent after December 10) and the second is due February 1 (delinquent after April 10).
Alameda County Property Tax Calculator (2026)
Rates updated 2026 (U.S. Census Bureau ACS 2024). Live estimate — county median effective rate.
Alameda County's median effective property tax rate is 0.06% above the California median and the US average is 0.94%. Your assessed value, local millage, and exemptions (homestead, senior, veteran) will change the actual bill.
Who assesses and collects property tax in Alameda County?
In Alameda County, the Alameda County Assessor sets the assessed value of your home each year. The Alameda County Treasurer-Tax Collector issues the bill and collects payment. Assessment appeals are heard by the Alameda County Assessment Appeals Board (Clerk of the Board).
For your exact rate, exemptions, and account details, go to acassessor.org — the official source for Alameda County. This page is an independent estimate, not a tax bill.
How much is property tax on a home in Alameda County?
At the Alameda County median effective rate of 0.76%, here is the estimated annual and monthly bill by home value. The county median home value is $1,090,100, with a median tax of about $8,474 a year.
| Home value | Rate (0.76%) | Annual tax | Monthly |
|---|---|---|---|
| $200,000 | 0.76% | $1,520 | $127 |
| $400,000 | 0.76% | $3,040 | $253 |
| $1,090,100 (county median) | 0.76% | $8,474 | $706 |
| $750,000 | 0.76% | $5,700 | $475 |
When are Alameda County property taxes due, and when can you appeal?
Assessment (lien) date: January 1 (lien date); reassessed on a change of ownership or new construction under Proposition 13. Proposition 13 — assessed value is the purchase price plus up to 2% inflation per year, reset only on sale or new construction.
Payment: Two installments: the first is due November 1 (delinquent after December 10) and the second is due February 1 (delinquent after April 10).
Appeal window: File a regular assessment appeal between July 2 and September 15. Missing it usually means accepting the assessed value for the year.
What exemptions can lower your Alameda County property tax?
| Exemption | Amount or rule |
|---|---|
| Homeowners' Exemption | $7,000 off assessed value (about $70/year); file by February 15 for the full amount, late claims get $5,600 |
| Disabled Veterans' Exemption | exempts a large share of assessed value for qualifying disabled veterans and surviving spouses |
| Decline-in-value (Prop 8) review | a temporary reduction when market value falls below your Prop 13 assessed value |
Amounts and eligibility change over time and are administered locally, so confirm what you qualify for with the Alameda County Assessor before relying on a figure.
How do you estimate your Alameda County property tax by hand?
- Find your home's assessed value on your latest notice from the Alameda County Assessor.
- Subtract any exemptions you qualify for, such as homestead, senior, or veteran relief.
- Multiply the remaining taxable value by your local combined tax rate.
- For a quick estimate, multiply your home value by 0.76% — the Alameda County median effective rate used above.
Which cities are in Alameda County, and what makes it different?
Alameda County includes Oakland, Fremont, Hayward, Berkeley, San Leandro, Livermore, Pleasanton, Union City, Dublin, Alameda, among others. Rates differ between these cities and their school and special districts, so two homes of equal value can owe different amounts.
Alameda County (Oakland and the East Bay) reassesses to market value only on a sale or new construction under Proposition 13, so long-time owners often pay far less than recent buyers next door. The regular appeal window closes September 15 — earlier than many California counties — and some newer communities add Mello-Roos special-district charges.