Property Taxes in Center Island, Washington
Median Center Island, Washington effective property tax rate: 0.43%, significantly lower than the national median of 1.02%, and lower than the Washington state median of 0.92%.
Median Center Island, Washington home value: $250,190
Median annual Center Island, Washington tax bill: $956, lower than the national median property tax bill of $2,400.
How are property taxes in San Juan calculated?
Property taxes in Center 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.
Understanding Center Island's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Center Island, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
How Does the Center Island Property Tax Calculator Work?
Use this Center Island property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Center Island's median effective tax rate of 0.43% — based on actual property records in San Juan County — to generate your estimate.
Enter your property's estimated assessed value — the figure the local assessor uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home's market value. Our calculator applies Center 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 Center Island: rates can differ based on local levies and assessment districts. Center Island's median property tax bill of $956 is lower than Washington's 0.92% state median tax rate and well below the $2,400 national median property tax bill.
If your estimate is higher than expected, Ownwell can appeal your Center Island assessment — you only pay if we save you money.
About Center Island Property Taxes
About Property Taxes in Center Island, San Juan, Washington
Center Island’s median effective property tax rate of 0.43% 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 city.
Property tax rates are not uniform across Center Island. Homeowners in the highest ZIP code carry a median effective rate of 0.43%, while those in the lowest ZIP code pay 0.43%. This spread reflects how school district boundaries and local assessment districts are drawn across San Juan County. Understanding which part of Center Island you live in can make a meaningful difference to your annual tax bill.
Center Island homeowners who believe their assessed value is too high can file a formal appeal with the Tax Assessor before November 5, 2026.
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 Center 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 Center Island's effective property tax rate to other cities in Washington and the median property tax rates in Washington 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 Center Island Tax Rate
0.43%
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 Center Island, San Juan County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Assessment Values Across Center Island, San Juan County, Washington
When examining property taxes in Center 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 spring 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 Center Island, the median home price is $250,190, while the median tax bill is $956. That is well below the national median property tax bill of $2,400 and the national median property tax rate of 1.02%.
Property Tax Assessment Values Across Center Island, San Juan County, Washington
Source: Ownwell
$324,480
$776,078
$1,227,675
Median Center Island Market Value
$250,190
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 Center Island, San Juan County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|
Source: Ownwell
Save on Your Property Taxes and More With Ownwell
$774
Average Annual Tax Savings
Property Tax Bills Across Center Island, San Juan County, Washington
How are property tax bills calculated in Center Island?
Property tax bills in Center Island are based on the assessed value of a home, which is then multiplied by the local tax rate. That assessed value is influenced by factors such as the property’s market value, size, location, and any improvements made to the home. When assessed values rise, homeowners can see higher tax bills even if their income stays the same.
What do homeowners pay in Center Island?
The median home price is $250,190, and property tax bills vary widely. The 25th percentile tax bill is $731, the 75th percentile is $1,702, and the 90th percentile reaches $2,790. Compared with the national median property tax rate of 1.02% and the national median property tax bill of $2,400, many homeowners may be paying more than they should.
How can Ownwell help?
Ownwell can review your property’s assessment, identify opportunities for savings, and help you appeal an unfair tax bill. By challenging an inflated assessed value, Ownwell can help homeowners lower their property tax burden and keep more money in their pocket.
Property Tax Bills Across Center Island, San Juan County, Washington
Source: Ownwell
$1,236
$3,903
$6,570
Median Center Island Tax Bill
$956
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 Center Island, San Juan County, Washington
| Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|
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 |