Deer Park, Napa County, California Property Taxes

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Property Taxes in Deer Park, California

Median Deer Park, California effective property tax rate: 1.08%, significantly higher than the national median of 1.02%, and lower than the California state median of 1.21%.
Median Deer Park, California home value: $534,668
Median annual Deer Park, California tax bill: $6,624, higher than the national median property tax bill of $2,400.

How are property taxes in Napa calculated?

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

Last Updated April 13, 2026

Deer Park, Napa County, California Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

1.08%

Estimate Property Tax Bill

$5,774

$5,358

How Does the Deer Park Property Tax Calculator Work?

Use this Deer Park property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Deer Park's median effective tax rate of 1.08% — based on actual property records in Napa 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 Deer Park'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 Deer Park: rates range from 1.08% in 94576 to 1.08% in 94576, primarily due to differences in school district levies and local assessment districts.

For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Deer Park.

About Deer Park Property Taxes

About Property Taxes in Deer Park, Napa, California

Deer Park’s median effective property tax rate of 1.08% is lower than the California state median of 1.21% and lower than the national median of 1.02%. This rate reflects the Napa 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 Deer Park. Homeowners in the 94576 ZIP code carry a median effective rate of 1.08%, while those in the same ZIP code also pay 1.08%. This spread reflects how school district boundaries and local assessment districts are drawn across Napa County. Understanding which part of Deer Park you live in can make a meaningful difference to your annual tax bill.

Deer Park homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the November 30, 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 Deer Park, Napa 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 Deer Park'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 Deer Park, Napa County, California

Source: Ownwell

1.04%

1.42%

1.80%

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 Deer Park Tax Rate

1.08%

Median Effective Napa County Tax Rate

1.24%

Median Effective California Tax Rate

1.21%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Deer Park, Napa County, California

Zip	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
94576	1.07%	1.07%	1.08%	1.15%	1.75%

Source: Ownwell

Property Tax Assessment Values Across Deer Park, Napa County, California

When examining property taxes in Deer Park, 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 Napa County assessment office 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 Napa County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of the month.

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 Deer Park.

For example, the median home price in Deer Park is $534,668, with tax bills ranging significantly across the county. ZIP code 94576 has the highest median home price at $534,668.

Property Tax Assessment Values Across Deer Park, Napa County, California

Source: Ownwell

$243,131

$1,223,537

$2,203,942

Median Deer Park Market Value

$534,668

Median Napa County Market Value

$488,969

Median California Market Value

$427,605

Median United States Market Value

$235,294

Property Tax Assessment Values Across Deer Park, Napa County, California

Zip	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
94576	$85,574	$211,450	$534,668	$838,028	$1,326,510

Source: Ownwell

Property Tax Bills Across Deer Park, Napa County, California

Property tax bills in Deer Park are based on the assessed value of a home, not its market price. Local tax rates are applied to that assessed value to determine the annual bill, and those rates can reflect county and other local levies. For homeowners, this means a higher assessed value generally leads to a larger tax bill, while a lower assessed value can reduce what is owed.

In Deer Park, the median home price is $534,668, and the median property tax bill is $6,624. That is well above the national median property tax bill of $2,400 and above the national median property tax rate of 1.02%. Bills can vary widely across homes, with the 25th percentile at $3,044, the 75th percentile at $10,088, and the 90th percentile at $13,850. This range shows how property taxes can significantly affect household budgets in Deer Park.

Property Tax Bills Across Deer Park, Napa County, California

Source: Ownwell

$4,232

$14,388

$24,544

Median Deer Park Tax Bill

$6,624

Median Napa County Tax Bill

$6,259

Median California Tax Bill

$5,134

Median United States Tax Bill

$2,400

Property Tax Bills Across Deer Park, Napa County, California

Zip	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
94576	$1,783	$3,044	$6,624	$10,088	$13,850

Source: Ownwell

Don't miss the deadline to appeal!

Dates
Appeal Deadline	November 30

Links
Napa Tax Assessor
Website	common1.mptsweb.com

Frequently Asked Property Tax Questions in Deer Park, California

How are property taxes calculated in Deer Park, California?

Property taxes in Deer Park, 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 Deer Park, California?

To appeal your property taxes in Deer Park, 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 Deer Park, California?

Common property tax exemptions in Deer Park, 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 Deer Park, California?

Property tax deadlines in Deer Park, 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 Deer Park, California?

Ownwell provides professional property tax appeal services in Deer Park, 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.