San Juan County, Washington Property Taxes
Property Taxes in San Juan County, Washington
Median San Juan County effective property tax rate: 0.57%, significantly lower than the national median of 1.02%.
Median San Juan County home value: $798,910
Median annual San Juan County tax bill: $4,329, 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 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 your county's property tax system, exemptions, and reduction opportunities can lead to significant savings. Whether you live in San Juan County or another part of San Juan County, knowing local tax details benefits homeowners and investors.
Last Updated April 13, 2026
San Juan County, Washington Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
0.57%
Estimate Property Tax Bill
$4,554
$4,226
$774
Average Annual Tax Savings
How Does the San Juan County Property Tax Calculator Work?
Use this San Juan County property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies San Juan County's median effective tax rate of 0.57% — drawn from real transactions across the county — to generate your estimate.
Enter your property's estimated assessed value — the value the appraisal district assigns to your property, typically lower than market value after exemptions. Our calculator uses the median effective rate (actual bills divided by market value), which accounts for typical exemptions and is more accurate than applying the statutory millage rate directly.
Note: your assessed value reflects any exemptions you currently have. Rates vary across San Juan County — scroll down to explore city-level trends and find the rate specific to your area. San Juan County's median effective tax rate is lower than Washington's 0.92% state median and below the national median property tax rate of 1.02%. The county's median property tax bill is $4,329, which is $1,929 higher than the state median.
If your estimate is higher than expected, Ownwell can protest your San Juan County assessment.
Property Tax Rates Across San Juan County, Washington
What Are Effective Property Tax Rates Across San Juan County?
Local government entities set tax rates, which vary widely across San Juan 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 San Juan County's effective property tax rate to other counties in Washington or the U.S. median of 1.02%.
San Juan County's median effective rate stands at 0.57%, which is lower than the national median of 1.02%. Within San Juan County, the highest rate is found in Lopez Island at 0.60%, while Blakely Island has the lowest at 0.42%.
These variations reflect differences in local school district levies, Local improvement districts (LIDs) assessments, and special district bonds — which compound the base county rate.
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%
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 Washington Tax Rate
0.92%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across San Juan County, Washington
| City | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Anacortes | 0.41% | 0.42% | 0.43% | 0.46% | 0.51% |
| Blakely Island | 0.41% | 0.41% | 0.42% | 0.43% | 0.43% |
| Center Island | 0.41% | 0.42% | 0.43% | 0.47% | 0.49% |
| Decatur Island | 0.41% | 0.41% | 0.42% | 0.43% | 0.45% |
| Deer Harbor | 0.53% | 0.53% | 0.54% | 0.55% | 0.55% |
| Eastsound | 0.53% | 0.54% | 0.54% | 0.55% | 0.57% |
| Friday Harbor | 0.51% | 0.57% | 0.58% | 0.58% | 0.59% |
| Lopez Island | 0.49% | 0.59% | 0.60% | 0.61% | 0.62% |
| Obstruction Island | 0.41% | 0.41% | 0.42% | 0.42% | 0.43% |
| Olga | 0.53% | 0.54% | 0.54% | 0.56% | 0.57% |
| Orcas | 0.53% | 0.53% | 0.54% | 0.55% | 0.56% |
| Orcas Island | 0.53% | 0.53% | 0.54% | 0.55% | 0.57% |
| San Juan Island | 0.56% | 0.56% | 0.57% | 0.59% | 0.70% |
| Shaw Island | 0.37% | 0.37% | 0.38% | 0.39% | 0.40% |
| Bell Island | N/A | N/A | N/A | N/A | N/A |
| Crane Island | N/A | N/A | N/A | N/A | N/A |
| Henry Island | N/A | N/A | N/A | N/A | N/A |
| Mercer Island | N/A | N/A | N/A | N/A | N/A |
| Seattle | N/A | N/A | N/A | N/A | N/A |
| Stuart Island | N/A | N/A | N/A | N/A | N/A |
| Trump Island | N/A | N/A | N/A | N/A | N/A |
| Waldron | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Assessment Values Across San Juan County, Washington
When examining property taxes in San Juan 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 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. 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 San Juan County.
For example, the median tax bill in San Juan County is $4,329, above the national median property tax bill of $2,400. Tax bills range significantly across the county, from $956 in Center Island to $6,570 in Deer Harbor. Deer Harbor also has the highest median home price at $1,227,675.
Property Tax Assessment Values Across San Juan County, Washington
Source: Ownwell
$324,480
$776,078
$1,227,675
Median San Juan County Market Value
$798,910
Median Washington Market Value
$501,600
Median United States Market Value
$235,294
Property Tax Assessment Values Across San Juan County, Washington
| City | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Anacortes | $95,820 | $211,140 | $324,480 | $448,360 | $669,470 |
| Blakely Island | $392,830 | $498,360 | $713,920 | $1,034,830 | $1,517,700 |
| Center Island | $150,856 | $170,060 | $250,190 | $426,130 | $692,880 |
| Decatur Island | $250,754 | $399,450 | $607,910 | $910,760 | $1,214,100 |
| Deer Harbor | $548,245 | $834,992 | $1,227,675 | $2,141,745 | $3,073,020 |
| Eastsound | $281,012 | $496,705 | $799,070 | $1,191,105 | $1,950,666 |
| Friday Harbor | $306,452 | $510,665 | $797,320 | $1,321,830 | $2,152,738 |
| Lopez Island | $315,752 | $512,915 | $804,730 | $1,248,720 | $1,831,998 |
| Obstruction Island | $471,070 | $556,185 | $664,790 | $901,035 | $1,006,010 |
| Olga | $324,945 | $521,062 | $798,605 | $1,387,592 | $2,117,475 |
| Orcas | $470,453 | $704,378 | $1,080,295 | $1,938,035 | $3,532,344 |
| Orcas Island | $320,970 | $585,860 | $975,910 | $1,524,480 | $1,927,250 |
| San Juan Island | $309,760 | $589,818 | $1,086,090 | $1,635,490 | $2,877,220 |
| Shaw Island | $383,752 | $553,420 | $864,790 | $1,596,740 | $2,626,072 |
| Bell Island | N/A | N/A | N/A | N/A | N/A |
| Crane Island | N/A | N/A | N/A | N/A | N/A |
| Henry Island | N/A | N/A | N/A | N/A | N/A |
| Mercer Island | N/A | N/A | N/A | N/A | N/A |
| Seattle | N/A | N/A | N/A | N/A | N/A |
| Stuart Island | N/A | N/A | N/A | N/A | N/A |
| Trump Island | N/A | N/A | N/A | N/A | N/A |
| Waldron | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Property Tax Bills Across San Juan County, Washington
Property tax bills in San Juan County are based on the assessed value of a home, not its market price alone. Local taxing authorities apply the county’s tax rate to that assessed value, so a higher assessment usually means a higher bill. For a county with a median home price of $798,910, that calculation can create meaningful differences across homeowners, especially when assessments rise faster than the home’s true market value.
What factors are considered? The home’s assessed value, local tax rates, and any exemptions or appeals all affect the final bill. In San Juan County, the 25th percentile tax bill is $2,578, while the 75th percentile is $7,033 and the 90th percentile is $11,473. Bills also vary by location, with the highest median tax bill in Deer Harbor at $6,570 and the lowest in Center Island at $956.
Ownwell helps homeowners review their assessments, identify savings opportunities, and file appeals when a property is overassessed. That can lower property tax bills and reduce what homeowners pay each year.
Median San Juan County Tax Bill
$4,329
Median Washington Tax Bill
$4,512
Median United States Tax Bill
$2,400
Property Tax Bills Across San Juan County, Washington
| City | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
|---|---|---|---|---|---|
| Anacortes | $407 | $630 | $1,236 | $1,927 | $2,791 |
| Blakely Island | $1,598 | $2,102 | $2,979 | $4,210 | $6,144 |
| Center Island | $625 | $731 | $956 | $1,702 | $2,790 |
| Decatur Island | $1,048 | $1,682 | $2,469 | $3,755 | $4,961 |
| Deer Harbor | $2,980 | $4,279 | $6,570 | $10,889 | $16,059 |
| Eastsound | $1,284 | $2,522 | $4,170 | $6,260 | $10,312 |
| Friday Harbor | $1,342 | $2,764 | $4,481 | $7,407 | $11,982 |
| Lopez Island | $1,475 | $2,889 | $4,689 | $7,259 | $10,599 |
| Obstruction Island | $2,022 | $2,358 | $2,790 | $3,730 | $4,152 |
| Olga | $1,508 | $2,668 | $4,288 | $7,363 | $11,200 |
| Orcas | $2,161 | $3,675 | $5,803 | $10,368 | $18,762 |
| Orcas Island | $1,559 | $2,800 | $4,881 | $8,068 | $10,245 |
| San Juan Island | $2,234 | $3,073 | $5,936 | $9,260 | $16,289 |
| Shaw Island | $1,338 | $2,135 | $3,292 | $6,063 | $9,716 |
| Bell Island | N/A | N/A | N/A | N/A | N/A |
| Crane Island | N/A | N/A | N/A | N/A | N/A |
| Henry Island | N/A | N/A | N/A | N/A | N/A |
| Mercer Island | N/A | N/A | N/A | N/A | N/A |
| Seattle | N/A | N/A | N/A | N/A | N/A |
| Stuart Island | N/A | N/A | N/A | N/A | N/A |
| Trump Island | N/A | N/A | N/A | N/A | N/A |
| Waldron | N/A | N/A | N/A | N/A | N/A |
Source: Ownwell
$774
Average Annual Tax Savings
Save on Your Property Taxes and More With Ownwell
Want to lower your San Juan County property taxes?
How Can I Lower My Property Taxes in San Juan County?
Looking to reduce your San Juan County property taxes? Ownwell is the leading property tax appeal company serving San Juan County. We specialize in helping property owners in the Friday Harbor area and beyond lower their tax bills by working directly with the San Juan County Assessor.
Through our tax monitoring service, we collect all necessary information to maximize your tax reductions. We navigate the complexities of the San Juan County property tax appeal process and identify all available exemptions, so you don't have to.
Whether you are a homeowner, a real estate investor, or an asset manager, our local team at Ownwell has the expertise to assess your current property tax situation and find strategic opportunities for reducing your tax burden.
Property Tax Appeals in Washington
Property tax protests in San Juan County begin when a homeowner believes the assessed value of a property is too high. The first step is to review the assessment notice and compare it with recent sales, property condition, and other relevant details that may show the market value is lower than the county’s assessment. If the assessment seems inaccurate, the homeowner can file an appeal by the deadline and present evidence supporting a lower value.
The appeal is heard by the board that listens to property tax disputes, where the homeowner can explain why the assessment should be reduced. This process usually involves submitting documents, sales comparisons, and any information that helps show the property was overvalued. The Tax Assessor’s office may also review the case before or during the appeal process. After the hearing, the board can uphold the current assessment, lower it, or, in some cases, adjust it in another direction if the evidence supports a different value.
Ownwell helps homeowners navigate the property tax appeal process from start to finish. That includes reviewing the assessment, identifying potential savings, preparing the appeal, and organizing the evidence needed for a strong case. Ownwell also helps homeowners understand what the board will consider and how to present the most persuasive argument for a lower assessment. For homeowners who want to challenge their property taxes without handling the process alone, Ownwell makes it easier to pursue a fair result.
Exemptions in Washington
What property tax exemption programs are available in San Juan County, Washington?
San Juan County homeowners may qualify for several property tax exemption programs that can reduce the assessed value of a home or lower the tax bill on a primary residence. The most important option for many owners is the homeowner exemption for a primary residence, which is designed for a property that is occupied as the owner’s main home. This type of exemption is especially valuable because it is tied to the place where the homeowner actually lives, not a second home or investment property.
Who is eligible for property tax exemptions in San Juan County?
Eligibility depends on the specific exemption. Homeowners who use the property as their primary residence may qualify for a homeowner exemption, while seniors, people with disabilities, and some veterans may qualify for additional relief if they meet the program rules. Some exemptions are also available for surviving spouses or other qualifying household situations.
How do homeowners apply for exemptions?
Homeowners generally apply through the county assessor’s office by submitting an application and any required supporting documents that prove ownership, residency, or eligibility. Because each exemption has its own rules, it is important to review the requirements carefully and apply as soon as possible.
How can Ownwell help?
Ownwell can help homeowners identify the exemption programs they may qualify for, prepare the paperwork, and make sure they do not miss savings opportunities on their primary residence.
Available Exemptions
Senior
Disabled
Veteran
Non-Profit
Don't miss the deadline to appeal!
Dates | |
|---|---|
| Appeal Deadline | November 5 |
| Tax Bill | |
| Issued | February 10 |
| Due Date #1 | April 30 |
| Due Date #2 | October 31 |
Links | |
|---|---|
| San Juan Tax Assessor | |
| Website | parcel.sanjuancountywa.gov |