Property Taxes in Alamo, California
Median Alamo, California effective property tax rate: 1.13%, significantly lower than the national median of 1.02%, and lower than the California state median of 1.21%.
Median Alamo, California home value: $1,520,246
Median annual Alamo, California tax bill: $16,884, $14,484 higher than the national median property tax bill of $2,400.
How are property taxes in Contra Costa calculated?
Property taxes in Alamo, California are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding Alamo's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Alamo, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Alamo Property Tax Calculator Work?
Use this Alamo property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Alamo's median effective tax rate of 1.13% — based on actual property records in Contra Costa County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local appraisal district uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Alamo's median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.
Your bill may vary by ZIP code within Alamo: rates range from 1.13% in 94507 to 1.13% in 94507, primarily due to differences in school district levies and local assessment districts.
If your estimate is higher than expected, Ownwell can appeal your Alamo assessment — you only pay if we save you money.
About Alamo Property Taxes
About Property Taxes in Alamo, Contra Costa, California
Alamo’s median effective property tax rate of 1.13% is lower than the California state median of 1.21% and higher than the national median of 1.02%. This rate reflects the Contra Costa County base levy combined with local school district levies and Mello-Roos Community Facility Districts that vary by subdivision throughout the city.
Property tax rates are not uniform across Alamo. Homeowners in the 94507 ZIP code carry a median effective rate of 1.13%, while those in the lowest ZIP code also pay 1.13%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Contra Costa County. Understanding which part of Alamo you live in can make a meaningful difference to your annual tax bill.
Alamo homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the December 1, 2026 deadline each year.
If your estimated bill above seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.
Property Tax Rates Across Alamo, Contra Costa County, California
As noted earlier, local government entities set tax rates, which can vary widely within a state.
Why? Because annually, each county estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate.
While there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.
Below, you can compare Alamo's effective property tax rate to other cities in California and the median property tax rates in California and the U.S.
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Alamo Tax Rate
1.13%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective Contra Costa County Tax Rate
1.31%
Median Effective California Tax Rate
1.21%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Alamo, Contra Costa County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94507 | 1.09% | 1.11% | 1.13% | 1.17% | 1.26% |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Assessment Values Across Alamo, Contra Costa County, California
When examining property taxes in Alamo, California, understanding the distinction between "market value" and "assessed value" is crucial.
The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The Contra Costa County appraisal district estimates the market value for tax purposes.
The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
Assessment notices:
In Contra Costa County, assessment notices are sent in October each year. They'll typically reach your mailbox by the middle of October.
Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in Alamo.
For example, the median home price in Alamo is $1,520,246, with tax bills ranging significantly across the county. 94507 has the highest median home price at $1,520,246.
Property Tax Assessment Values Across Alamo, Contra Costa County, California
Source: Ownwell
$153,114
$1,176,704
$2,200,294
Median Alamo Market Value
$1,520,246
Median Contra Costa County Market Value
$530,390
Median California Market Value
$427,605
Median United States Market Value
$274,101
Property Tax Assessment Values Across Alamo, Contra Costa County, California
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94507 | $480,723 | $913,649 | $1,520,246 | $2,190,047 | $2,968,671 |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Bills Across Alamo, Contra Costa County, California
Property tax bills in Alamo are based on the assessed value of a home, not the market value alone, and the amount a homeowner pays depends on the local tax rate applied to that assessment. With a median home price of $1,520,246, property taxes can create a significant yearly expense for homeowners in Contra Costa County. The typical bill in the area is $16,884 in ZIP code 94507, while the 25th percentile is $10,498, the 75th percentile is $23,859, and the 90th percentile reaches $32,141.
Because property taxes are tied to assessed value, even small errors can lead to overpaying. That is why reviewing your assessment matters, especially in a high-value market like Alamo. Ownwell helps homeowners save by identifying potential overassessments and pursuing property tax appeals and exemptions that may lower the bill. If your assessment is too high, Ownwell can help reduce what you owe and keep more money in your pocket.
Median Alamo Tax Bill
$16,884
Median Contra Costa County Tax Bill
$6,979
Median California Tax Bill
$5,134
Median United States Tax Bill
$3,209
Property Tax Bills Across Alamo, Contra Costa County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94507 | $5,874 | $10,498 | $16,884 | $23,859 | $32,141 |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Property Valuation Date | January 1 |
| Appeal Deadline | November 30 |
| Tax Bill | |
| Issued | October 1 |
| Due Date #1 | December 10 |
| Due Date #2 | April 10 |
Links | |
|---|---|
| Contra Costa Tax Assessor | |
| Website | www.contracosta.ca.gov |