Saint Helena, Napa County, California Property Taxes
Property Taxes in Saint Helena, California
Median Saint Helena, 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 Saint Helena, California home value: $795,688
Median annual Saint Helena, California tax bill: $8,880, higher than the national median property tax bill of $2,400.
How are property taxes in Napa calculated?
Property taxes in Saint Helena, 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 Saint Helena's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Saint Helena, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Saint Helena, Napa County, California Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.08%
Estimate Property Tax Bill
$8,593
$7,974
How Does the Saint Helena Property Tax Calculator Work?
Use this Saint Helena property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Saint Helena'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 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 Saint Helena'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 Saint Helena: rates range from 1.08% in 94574 to 1.08% in 94574, 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 Saint Helena.
About Saint Helena Property Taxes
About Property Taxes in Saint Helena, Napa, California
Saint Helena's median effective property tax rate of 1.08% is lower 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 Saint Helena. Homeowners in the 94574 ZIP code carry a median effective rate of 1.08%, while those in the same ZIP code pay 1.08%. This spread reflects how school district boundaries and local assessment districts are drawn across Napa County. Understanding which part of Saint Helena you live in can make a meaningful difference to your annual tax bill.
Saint Helena homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the November 30, 2026 deadline each year.
If your estimated bill 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 Saint Helena, 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 Saint Helena'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 Saint Helena Tax Rate
1.08%
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 Saint Helena, Napa County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94574 | 1.07% | 1.08% | 1.08% | 1.09% | 1.13% |
Source: Ownwell
Property Tax Assessment Values Across Saint Helena, Napa County, California
When examining property taxes in Saint Helena, 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. For example, the median home price in Saint Helena is $795,688, with a median tax bill of $8,880, compared with the national median property tax rate of 1.02% and national median property tax bill of $2,400.
Property Tax Assessment Values Across Saint Helena, Napa County, California
Source: Ownwell
$243,131
$1,223,537
$2,203,942
Median Saint Helena Market Value
$795,688
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 Saint Helena, Napa County, California
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94574 | $97,072 | $324,992 | $795,688 | $1,524,146 | $2,852,099 |
Source: Ownwell
Property Tax Bills Across Saint Helena, Napa County, California
Property tax bills in Saint Helena are based on the assessed value of a home, which is then multiplied by the local tax rate. For homeowners in Napa County, the size of the bill depends heavily on the market value of the property and any local assessments or exemptions that apply. With a median home price of $795,688, many residents face tax bills that can be well above the national median property tax bill of $2,400.
The tax bill is not the same for every homeowner because it reflects the specific assessed value of each property. In Saint Helena, the median tax bill is $8,880, and bills can rise much higher depending on the home’s value and tax rate. This means property taxes can have a significant impact on monthly housing costs and long-term affordability, especially for owners of higher-value homes.
Median Saint Helena Tax Bill
$8,880
Median Napa County Tax Bill
$6,259
Median California Tax Bill
$5,134
Median United States Tax Bill
$2,400
Property Tax Bills Across Saint Helena, Napa County, California
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 94574 | $1,072 | $3,652 | $8,880 | $16,760 | $31,160 |
Source: Ownwell
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | November 30 |
Links | |
|---|---|
| Napa Tax Assessor | |
| Website | common1.mptsweb.com |