Property Taxes in Castaic, California
Median Castaic, California effective property tax rate: 1.39%, significantly higher than the national median of 1.02%, and higher than the California state median of 1.21%.
Median Castaic, California home value: $513,070
Median annual Castaic, California tax bill: $7,066, higher than the national median property tax bill of $2,400.
How are property taxes in Los Angeles calculated?
Property taxes in Castaic, 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 Castaic's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Castaic, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Castaic Property Tax Calculator Work?
Use this Castaic property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Castaic's median effective tax rate of 1.39% — based on actual property records in Los Angeles County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessment system uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Castaic'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 Castaic: rates range from 1.39% in 91384 to 1.39% in 91384, primarily due to differences in school district levies and local assessment districts.
If your estimate is higher than expected, Ownwell can appeal your Castaic assessment — you only pay if we save you money.
About Castaic Property Taxes
About Property Taxes in Castaic, Los Angeles, California
Castaic’s median effective property tax rate of 1.39% is higher than the California state median of 1.21% and higher than the national median of 1.02%. This rate reflects the Los Angeles 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 Castaic. Homeowners in ZIP code 91384 carry a median effective rate of 1.39%, while those in the lowest ZIP code also pay 1.39%. That means there is no spread across the city, but location still matters when local levies and district boundaries are involved.
Castaic homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the December 1, 2026 deadline each year.
If your estimated bill of $7,066 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 Castaic, Los Angeles 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 Castaic'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 Castaic Tax Rate
1.39%
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 Los Angeles County Tax Rate
1.29%
Median Effective California Tax Rate
1.21%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across Castaic, Los Angeles County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 91384 | 1.30% | 1.34% | 1.39% | 1.50% | 1.64% |
| 91310 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Assessment Values Across Castaic, Los Angeles County, California
When examining property taxes in Castaic, 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 Los Angeles County assessor 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 Los Angeles County, assessment notices are sent in the spring 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 Castaic.
For example, the median home price in Castaic is $513,070, with tax bills ranging significantly across the county. 91384 has the highest median home price at $513,070.
Property Tax Assessment Values Across Castaic, Los Angeles County, California
Source: Ownwell
$56,016
$1,480,655
$2,905,294
Median Castaic Market Value
$513,070
Median Los Angeles County Market Value
$457,139
Median California Market Value
$427,605
Median United States Market Value
$274,101
Property Tax Assessment Values Across Castaic, Los Angeles County, California
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 91384 | $246,872 | $367,908 | $513,070 | $663,253 | $841,414 |
| 91310 | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Bills Across Castaic, Los Angeles County, California
Property tax bills in Castaic are based on the assessed value of a home, which is often tied to market value, and the local tax rate applied by Los Angeles County. For a home with a median price of $513,070, the tax bill can vary widely depending on the property’s assessed value and any exemptions that may apply. Homeowners in Castaic typically see tax bills that fall between $5,010 at the 25th percentile and $9,166 at the 75th percentile, with the 90th percentile reaching $11,519.
How much you pay affects monthly housing costs and long-term affordability, especially when your assessed value rises faster than expected. Ownwell helps homeowners by reviewing assessments, identifying savings opportunities, and filing property tax appeals and exemptions that may lower the bill.
Median Castaic Tax Bill
$7,066
Median Los Angeles County Tax Bill
$5,993
Median California Tax Bill
$5,134
Median United States Tax Bill
$3,209
Property Tax Bills Across Castaic, Los Angeles County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 91384 | $3,076 | $5,012 | $7,066 | $9,167 | $11,520 |
| 91310 | N/A | N/A | N/A | N/A | N/A |
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 | |
|---|---|
| Los Angeles Tax Assessor | |
| Phone | (213) 974-3211 |
| Website | portal.assessor.lacounty.gov |
| pio@assessor.lacounty.gov | |