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Altadena, Los Angeles County, California Property Taxes

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Property Taxes in Altadena, California

  • Median Altadena, California effective property tax rate: 1.24%, significantly higher than the national median of 1.02%, and higher than the California state median of 1.21%.

  • Median Altadena, California home value: $534,790

  • Median annual Altadena, California tax bill: $6,610, $4,210 higher than the national median property tax bill of $2,400.

How are property taxes in Los Angeles calculated?

Property taxes in Altadena, 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 Altadena's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Altadena, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Altadena, Los Angeles County, California Property Tax Bill Calculator

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

1.24%

Estimate Property Tax Bill

$6,631

$6,154

SAVE WITH OWNWELL

$774

Average Annual Tax Savings

How Does the Altadena Property Tax Calculator Work?

Use this Altadena property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Altadena's median effective tax rate of 1.24% — 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 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 Altadena'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 Altadena: rates range from 1.24% in 91001 to 1.24% in 91001, primarily due to differences in school district levies and local assessment districts.

Altadena's median property tax bill is $6,610, which is higher than the national median property tax bill of $2,400 and higher than the California median property tax bill of $2,400. If your estimate is higher than expected, Ownwell can appeal your Altadena assessment — you only pay if we save you money.

About Altadena Property Taxes

About Property Taxes in Altadena, Los Angeles, California

Altadena’s median effective property tax rate of 1.24% 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 Altadena. Homeowners in the 91001 ZIP code carry a median effective rate of 1.24%, while those in the lowest ZIP code pay 1.24%. This spread — 0 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Los Angeles County. Understanding which part of Altadena you live in can make a meaningful difference to your annual tax bill.

Altadena homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before December 1, 2026.

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 Altadena, 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 Altadena's effective property tax rate to other cities in California and the median property tax rates in California and the U.S.

Property Tax Rates Across Altadena, Los Angeles County, California

Source: Ownwell

1.10%

1.52%

1.95%

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 Altadena Tax Rate

1.24%

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

1.02%

Property Tax Rates Across Altadena, Los Angeles County, California

Zip10th Percentile25th PercentileMedian Tax Rate75th Percentile90th Percentile
910011.15%1.18%1.24%1.38%1.80%

Source: Ownwell

Property Tax Assessment Values Across Altadena, Los Angeles County, California

When examining property taxes in Altadena, 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 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 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. For example, the median home price in Altadena is $534,790, with tax bills ranging significantly across the county. 91001 has the highest median home price at $534,790.

Property Tax Assessment Values Across Altadena, Los Angeles County, California

Source: Ownwell

$56,016

$1,480,655

$2,905,294

Median Altadena Market Value

$534,790

Median Los Angeles County Market Value

$457,139

Median California Market Value

$427,605

Median United States Market Value

$235,294

Property Tax Assessment Values Across Altadena, Los Angeles County, California

Zip10th Percentile25th PercentileMedian Home Price75th Percentile90th Percentile
91001$103,789$253,087$534,790$892,363$1,303,507

Source: Ownwell

Property Tax Bills Across Altadena, Los Angeles County, California

Property tax bills in Altadena are based on the assessed value of a home, not its market price alone. Local taxing authorities apply the property tax rate to that assessed value, and the final bill can also reflect exemptions, special assessments, and other local charges. With a median home price of $534,790, homeowners in Altadena often see tax bills that vary widely depending on how their property is assessed and which levies apply.

The median property tax bill in the area is $6,610, which is well above the national median property tax bill of $2,400. Bills at the 25th percentile are $3,483, while the 75th percentile reaches $10,594 and the 90th percentile climbs to $15,319. That range shows how much a property tax bill can affect monthly housing costs and long-term affordability.

Ownwell helps homeowners lower their property tax bills by reviewing assessments, identifying savings opportunities, and filing appeals when a property is overassessed.

Property Tax Bills Across Altadena, Los Angeles County, California

Source: Ownwell

$875

$17,017

$33,158

Median Altadena Tax Bill

$6,610

Median Los Angeles County Tax Bill

$5,993

Median California Tax Bill

$5,134

Median United States Tax Bill

$2,400

Property Tax Bills Across Altadena, Los Angeles County, California

Zip10th Percentile25th PercentileMedian Tax Bill75th Percentile90th Percentile
91001$1,841$3,483$6,610$10,594$15,319

Source: Ownwell

Don't miss the deadline to appeal!

Frequently Asked Property Tax Questions in Altadena, California

How are property taxes calculated in Altadena, California?
Property taxes in Altadena, California are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.
How do I appeal my property taxes in Altadena, California?
To appeal your property taxes in Altadena, California, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.
What property tax exemptions are available in Altadena, California?
Common property tax exemptions in Altadena, California include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.
When are property taxes due in Altadena, California?
Property tax deadlines in Altadena, California vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.
How can Ownwell help reduce my property taxes in Altadena, California?
Ownwell provides professional property tax appeal services in Altadena, California. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.