Napa County, California Property Taxes
Property Taxes in Napa County, California
Median Napa County effective property tax rate: 1.24%, significantly higher than the national median of 1.02%.
Median Napa County home value: $488,969
Median annual Napa County tax bill: $6,259, higher than the national median property tax bill of $2,400.
How are property taxes in Napa County calculated?
Property taxes in Napa County 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 County’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in Napa or another part of Napa County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
Napa County, California Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.24%
Estimate Property Tax Bill
$6,063
$5,626
How Does the Napa County Property Tax Calculator Work?
Use this Napa County property tax calculator to estimate your annual property tax bill. Enter your property's assessed value and our calculator applies Napa County's median effective tax rate of 1.24% to generate your estimate.
Enter your property's estimated assessed value — the figure used for tax purposes, which is typically lower than market value after applicable exemptions. Our calculator uses the median effective rate for a more accurate estimate than the statutory millage rate alone.
Your actual bill may vary based on your specific exemptions, local school district levies, and any special assessment districts that apply to your property. Napa County's median effective tax rate is higher than California's 1.21% median rate, and the county's median property tax bill of $6,259 is $3,859 higher than the state median.
For a more precise estimate, scroll down to explore city and ZIP code-level tax rate trends across Napa County.
Property Tax Rates Across Napa County, California
What Are Effective Property Tax Rates Across Napa County?
Local government entities set tax rates, which vary widely across Napa County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.
Below, compare Napa County's effective property tax rate to other counties in California or the U.S. median of 1.02%.
Napa County's median effective rate stands at 1.24%, which is higher than the national median of 1.02%. Within Napa County, the highest rate is found in POPE VALLEY at 1.80%, while ANGWIN has the lowest at 1.04%.
These variations reflect differences in local school district levies, Mello-Roos Community Facility Districts assessments, and special district bonds — which compound the base county rate.
Our median effective property tax rate (tax bill Ă· 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%
Our median effective property tax rate (tax bill Ă· 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 California Tax Rate
1.21%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across Napa County, California
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| American Canyon | 1.13% | 1.13% | 1.15% | 1.32% | 1.43% |
| Angwin | 1.03% | 1.04% | 1.04% | 1.05% | 1.07% |
| Calistoga | 1.09% | 1.10% | 1.11% | 1.12% | 1.15% |
| Deer Park | 1.07% | 1.07% | 1.08% | 1.15% | 1.75% |
| Napa | 1.12% | 1.22% | 1.28% | 1.41% | 1.73% |
| Pope Valley | 1.07% | 1.10% | 1.80% | 2.13% | 2.76% |
| Saint Helena | 1.07% | 1.08% | 1.08% | 1.09% | 1.13% |
| Sonoma | 1.11% | 1.12% | 1.12% | 1.12% | 1.13% |
| Yountville | 1.00% | 1.10% | 1.11% | 1.12% | 1.14% |
| Glen Ellen | N/A | N/A | N/A | N/A | N/A |
| Middletown | N/A | N/A | N/A | N/A | N/A |
| Oakville | N/A | N/A | N/A | N/A | N/A |
| Rutherford | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Assessment Values Across Napa County, California
When examining property taxes in Napa County, 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 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 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 County.
For example, the median tax bill in Napa County is $6,259, with tax bills ranging significantly across the county. Sonoma has the highest median home price at $2,203,942.
Property Tax Assessment Values Across Napa County, California
Source: Ownwell
$243,131
$1,223,537
$2,203,942
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 County, California
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| American Canyon | $83,815 | $260,534 | $461,774 | $629,567 | $772,766 |
| Angwin | $135,390 | $286,578 | $534,950 | $811,224 | $1,234,370 |
| Calistoga | $86,152 | $237,734 | $531,044 | $882,933 | $1,607,997 |
| Deer Park | $85,574 | $211,450 | $534,668 | $838,028 | $1,326,510 |
| Napa | $114,244 | $260,572 | $481,694 | $747,910 | $1,085,218 |
| Pope Valley | $115,312 | $176,279 | $243,131 | $357,000 | $845,675 |
| Saint Helena | $97,072 | $324,992 | $795,688 | $1,524,146 | $2,852,099 |
| Sonoma | $571,028 | $1,223,222 | $2,203,942 | $3,269,396 | $4,767,480 |
| Yountville | $65,824 | $122,045 | $481,082 | $968,520 | $1,481,938 |
| Glen Ellen | N/A | N/A | N/A | N/A | N/A |
| Middletown | N/A | N/A | N/A | N/A | N/A |
| Oakville | N/A | N/A | N/A | N/A | N/A |
| Rutherford | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
Property Tax Bills Across Napa County, California
Property tax bills in Napa are based on the assessed value of a home and the local tax rate applied to that value. The assessed value is influenced by the property’s market value, while the final bill can also reflect local levies and voter-approved charges. For homeowners, this means two similar homes can receive very different tax bills if their assessed values or locations differ.
With a median home price of $488,969, Napa homeowners often face substantial property tax obligations. The county’s tax bills vary widely, with the 25th percentile at $3,571 and the 75th percentile at $9,450, showing how much taxes can differ across properties. At the high end, the 90th percentile reaches $13,866, which can create a significant annual cost for homeowners. These differences make it important to understand how property taxes are calculated and why a home’s assessed value matters so much in Napa.
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 County, California
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| American Canyon | $976 | $3,188 | $5,675 | $8,080 | $9,963 |
| Angwin | $1,290 | $2,952 | $5,626 | $8,489 | $12,928 |
| Calistoga | $934 | $2,715 | $6,139 | $9,992 | $18,613 |
| Deer Park | $1,783 | $3,044 | $6,624 | $10,088 | $13,850 |
| Napa | $1,977 | $3,735 | $6,341 | $9,407 | $13,328 |
| Pope Valley | $2,884 | $3,517 | $4,232 | $5,416 | $9,170 |
| Saint Helena | $1,072 | $3,652 | $8,880 | $16,760 | $31,160 |
| Sonoma | $6,360 | $13,643 | $24,544 | $36,480 | $53,243 |
| Yountville | $679 | $1,348 | $5,534 | $11,104 | $17,153 |
| Glen Ellen | N/A | N/A | N/A | N/A | N/A |
| Middletown | N/A | N/A | N/A | N/A | N/A |
| Oakville | N/A | N/A | N/A | N/A | N/A |
| Rutherford | N/A | N/A | N/A | N/A | N/A |
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 Napa County, California
How are property taxes calculated in Napa County, California?
How do I appeal my property taxes in Napa County, California?
What property tax exemptions are available in Napa County, California?
When are property taxes due in Napa County, California?
How can Ownwell help reduce my property taxes in Napa County, California?
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