Napa, Napa County, California Property Taxes
Property Taxes in Napa, California
Median Napa, California effective property tax rate: 1.28%, significantly higher than the national median of 1.02%, and higher than the California state median of 1.21%.
Median Napa, California home value: $481,694
Median annual Napa, California tax bill: $6,341, $3,941 higher than the national median property tax bill of $2,400.
How are property taxes in Napa calculated?
Property taxes in Napa, 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 Napa's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Napa, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Napa, Napa County, California Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.28%
Estimate Property Tax Bill
$6,166
$5,722
How Does the Napa Property Tax Calculator Work?
Use this Napa property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Napa's median effective tax rate of 1.28% — based on actual property records in Napa 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 Napa'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 Napa: rates range from $6,299 in 94559 to $6,357 in 94558, 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 Napa.
About Napa Property Taxes
About Property Taxes in Napa, Napa, California
Napa’s median effective property tax rate of 1.28% is higher than the California state median of 1.21% and higher 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 Napa. Homeowners in the 94559 ZIP code carry a median effective rate of 1.31%, while those in 94558 pay 1.27%. This spread — 0.04 percentage points across the same city — reflects how school district boundaries and local assessment districts are drawn across Napa County.
Napa 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 Napa, 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 Napa’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 Napa Tax Rate
1.28%
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 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 Napa, Napa County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94558 | 1.11% | 1.21% | 1.27% | 1.39% | 1.70% |
| 94559 | 1.20% | 1.24% | 1.31% | 1.47% | 1.86% |
Source: Ownwell
Property Tax Assessment Values Across Napa, Napa County, California
When examining property taxes in Napa, 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 May.
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 Napa.
For example, the median home price in Napa is $481,694, with tax bills ranging significantly across the county. 94558 has the highest median home price at $487,885.
Property Tax Assessment Values Across Napa, Napa County, California
Source: Ownwell
$243,131
$1,223,537
$2,203,942
Median Napa Market Value
$481,694
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 Napa, Napa County, California
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94558 | $108,817 | $260,723 | $487,885 | $760,218 | $1,132,887 |
| 94559 | $128,656 | $260,094 | $467,531 | $713,390 | $998,396 |
Source: Ownwell
Property Tax Bills Across Napa, Napa County, California
How are property tax bills calculated in Napa?
Property tax bills in Napa are based on the assessed value of a home and the local tax rate, not the market price alone. Assessors determine the taxable value, and that figure is then multiplied by the applicable rate to calculate the annual bill. Factors such as location, property characteristics, and any local levies can influence what homeowners owe.
For Napa homeowners, this means a higher assessed value can lead to a larger tax bill, while exemptions or other adjustments may reduce it. With a median home price of $481,694, property taxes can vary widely across the city. The 25th percentile tax bill is $3,735, the 75th percentile is $9,407, and the 90th percentile reaches $13,328.
Even within Napa County, tax bills can differ by zip code, with the highest median tax bill at $6,357 in 94558 and the lowest at $6,299 in 94559.
Median Napa Tax Bill
$6,341
Median Napa County Tax Bill
$6,259
Median California Tax Bill
$5,134
Median United States Tax Bill
$2,400
Property Tax Bills Across Napa, Napa County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94558 | $1,879 | $3,708 | $6,357 | $9,510 | $13,787 |
| 94559 | $2,283 | $3,820 | $6,299 | $9,120 | $12,470 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | November 30 |
Links | |
|---|---|
| Napa Tax Assessor | |
| Website | common1.mptsweb.com |