Property Taxes in San Juan Island, Washington
Median San Juan Island, Washington effective property tax rate: 0.57%, significantly lower than the national median of 1.02%, and lower than the Washington state median of 0.92%.
Median San Juan Island, Washington home value: $1,086,090
Median annual San Juan Island, Washington tax bill: $5,936, $3,536 higher than the national median property tax bill of $2,400.
How are property taxes in San Juan County calculated?
Property taxes in San Juan Island, Washington 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.
What makes property taxes in San Juan Island different from the national average? The effective property tax rate is 0.57%, which is below both the national median of 1.02% and the Washington state median of 0.92%.
Why is the annual tax bill still high? The median home value is $1,086,090, which helps explain the median annual tax bill of $5,936.
Understanding San Juan Island's property tax system, exemptions, and reduction opportunities can lead to significant savings.
Last Updated April 13, 2026
How Does the San Juan Island Property Tax Calculator Work?
Use this San Juan Island property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies San Juan Island's median effective tax rate of 0.57% — based on actual property records in San Juan County — to generate your estimate.
Enter your property's estimated assessed value — the figure used to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies San Juan Island'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 San Juan Island: rates range from 0.57% in 98250 to 0.57% in 98250, primarily due to differences in school district levies and local assessment districts. San Juan Island's median tax rate is lower than the 0.92% state median, but the median tax bill of $5,936 is higher than the national median property tax bill of $2,400 and $3,536 above the state median.
If your estimate is higher than expected, Ownwell can appeal your San Juan Island assessment — you only pay if we save you money.
About San Juan Island Property Taxes
About Property Taxes in San Juan Island, San Juan, Washington
San Juan Island’s median effective property tax rate of 0.57% is lower than the Washington state median of 0.92% and lower than the national median of 1.02%. This rate reflects the San Juan County base levy combined with local school district levies and Local improvement districts (LIDs) that vary by subdivision throughout the island.
Property tax rates are not uniform across San Juan Island. Homeowners in ZIP code 98250 carry a median effective rate of 0.57%, and the same ZIP code also reflects the island’s median home price of $1,086,090 and median tax bill of $5,936. Understanding how your assessed value is set can make a meaningful difference to your annual tax bill.
San Juan Island homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before the November 5, 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 San Juan Island, San Juan County, Washington
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 San Juan Island's effective property tax rate to other cities in Washington and the median property tax rates in Washington and the U.S.
Property Tax Rates Across San Juan Island, San Juan County, Washington
Source: Ownwell
0.38%
0.49%
0.60%
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 San Juan Island Tax Rate
0.57%
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 San Juan County Tax Rate
0.57%
Median Effective Washington Tax Rate
0.92%
Median Effective United States Tax Rate
1.27%
Property Tax Rates Across San Juan Island, San Juan County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98250 | 0.56% | 0.56% | 0.57% | 0.59% | 0.70% |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Assessment Values Across San Juan Island, San Juan County, Washington
When examining property taxes in San Juan Island, Washington, 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 San Juan County assessor 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 San Juan County, assessment notices are sent in the fall 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 San Juan Island is $1,086,090, with tax bills ranging significantly across the county. 98250 has the highest median home price at $1,086,090.
Property Tax Assessment Values Across San Juan Island, San Juan County, Washington
Source: Ownwell
$324,480
$776,078
$1,227,675
Median San Juan Island Market Value
$1,086,090
Median San Juan County Market Value
$798,910
Median Washington Market Value
$501,600
Median United States Market Value
$274,101
Property Tax Assessment Values Across San Juan Island, San Juan County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98250 | $309,760 | $589,818 | $1,086,090 | $1,635,490 | $2,877,220 |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Bills Across San Juan Island, San Juan County, Washington
Property tax bills in San Juan Island are based on the assessed value of a home and the local tax rate set by taxing authorities. When a property’s market value rises, the assessed value can rise too, which can increase the tax bill. For homeowners, that means a higher home value can lead to a larger annual tax burden, even if nothing about the property has changed.
With a median home price of $1,086,090, property taxes can make a meaningful difference for San Juan Island homeowners. The 25th percentile tax bill is $3,073, while the 75th percentile is $9,260 and the 90th percentile reaches $16,289. The median tax bill in ZIP code 98250 is $5,936, well above the national median property tax bill of $2,400 and above the national median property tax rate of 1.02%.
Ownwell helps homeowners review their assessed value, identify opportunities to appeal, and pursue exemptions that may lower their property tax bills.
Property Tax Bills Across San Juan Island, San Juan County, Washington
Source: Ownwell
$1,236
$3,903
$6,570
Median San Juan Island Tax Bill
$5,936
Median San Juan County Tax Bill
$4,329
Median Washington Tax Bill
$4,512
Median United States Tax Bill
$3,209
Property Tax Bills Across San Juan Island, San Juan County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| 98250 | $2,234 | $3,073 | $5,936 | $9,260 | $16,289 |
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | October 8 |
| Tax Bill | |
| Issued | February 10 |
| Due Date #1 | April 30 |
| Due Date #2 | October 31 |
Links | |
|---|---|
| San Juan Tax Assessor | |
| Website | parcel.sanjuancountywa.gov |