Custer, Whatcom County, Washington Property Taxes

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Property Taxes in Custer, Washington

Median Custer, Washington effective property tax rate: 0.73%, significantly lower than the national median of 1.02%, and lower than the Washington state median of 0.92%.
Median Custer, Washington home value: $503,537
Median annual Custer, Washington tax bill: $3,494, $1,094 higher than the national median property tax bill of $2,400.

How are property taxes in Whatcom calculated?

Property taxes in Custer, 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 Custer's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Custer, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Custer, Whatcom County, Washington Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

0.73%

Estimate Property Tax Bill

$3,676

$3,411

$774

Average Annual Tax Savings

How Does the Custer Property Tax Calculator Work?

Use this Custer property tax calculator to estimate your annual tax bill. Enter your property's assessed value and our calculator applies Custer's median effective tax rate of 0.73% — based on actual property records in Whatcom County — to generate your estimate.

Enter your property's estimated assessed value — the figure the local appraisal 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 Custer'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 Custer: rates range from 0.73% in 98240 to 0.73% in 98240, primarily due to differences in school district levies and local assessment districts.

If your estimate is higher than expected, Ownwell can appeal your Custer assessment — you only pay if we save you money.

About Custer Property Taxes

About Property Taxes in Custer, Whatcom, Washington

Custer’s median effective property tax rate of 0.73% is lower than the Washington state median of 0.92% and lower than the national median of 1.02%. This rate reflects the Whatcom 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 Custer. Homeowners in the 98240 ZIP code carry a median effective rate of 0.73%, while those in the lowest ZIP code pay 0.73%. This spread reflects how school district boundaries and local assessment districts are drawn across Whatcom County. Understanding which part of Custer you live in can make a meaningful difference to your annual tax bill.

Custer homeowners who believe their assessed value is too high can file a formal appeal with the local Tax Assessor before the October 27, 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 Custer, Whatcom 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 Custer'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 Custer, Whatcom County, Washington

Source: Ownwell

0.65%

0.77%

0.89%

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 Custer Tax Rate

0.73%

Median Effective Whatcom County Tax Rate

0.77%

Median Effective Washington Tax Rate

0.92%

Median Effective United States Tax Rate

1.27%

Property Tax Rates Across Custer, Whatcom County, Washington

Zip	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
98240	0.43%	0.71%	0.73%	0.75%	0.77%

Source: Ownwell

Save on Your Property Taxes and More With Ownwell

$774

Average Annual Tax Savings

Property Tax Assessment Values Across Custer, Whatcom County, Washington

When examining property taxes in Custer, 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 Whatcom 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 Whatcom County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of September.

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 Custer.

For example, the median home price in Custer is $503,537, with tax bills ranging significantly across the county. 98240 has the highest median home price at $503,537.

Property Tax Assessment Values Across Custer, Whatcom County, Washington

Source: Ownwell

$101,250

$359,643

$618,036

Median Custer Market Value

$503,537

Median Whatcom County Market Value

$511,606

Median Washington Market Value

$501,600

Median United States Market Value

$274,101

Property Tax Assessment Values Across Custer, Whatcom County, Washington

Zip	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
98240	$200,776	$353,438	$503,537	$668,339	$880,113

Source: Ownwell

Save on Your Property Taxes and More With Ownwell

$774

Average Annual Tax Savings

Property Tax Bills Across Custer, Whatcom County, Washington

Property tax bills in Custer are based on the assessed value of a home and the local tax rate set by taxing authorities in Whatcom County. When a home’s market value rises, the assessed value can increase too, which may lead to a higher bill. For homeowners, that means property taxes can change even if nothing about the home itself has changed.

In Custer, the median home price is $503,537, and the median property tax bill is $3,494 in ZIP code 98240. That is above the national median property tax bill of $2,400, showing how local assessments can create a heavier tax burden for homeowners.

Ownwell helps homeowners review their property tax assessments, identify opportunities to appeal, and pursue exemptions when available. By challenging an unfair assessed value, Ownwell can help lower property tax bills and reduce what homeowners pay each year.

Property Tax Bills Across Custer, Whatcom County, Washington

Source: Ownwell

$542

$2,782

$5,021

Median Custer Tax Bill

$3,494

Median Whatcom County Tax Bill

$3,775

Median Washington Tax Bill

$4,512

Median United States Tax Bill

$3,209

Property Tax Bills Across Custer, Whatcom County, Washington

Zip	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
98240	$521	$2,104	$3,494	$4,741	$6,299

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 26
Tax Bill
Issued	February 10
Due Date #1	April 30
Due Date #2	October 31

Links
Whatcom Tax Assessor
Website	property.spatialest.com

Frequently Asked Property Tax Questions in Custer, Washington

How are property taxes calculated in Custer, Washington?

Property taxes in Custer, Washington are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.

How do I appeal my property taxes in Custer, Washington?

To appeal your property taxes in Custer, Washington, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.

What property tax exemptions are available in Custer, Washington?

Common property tax exemptions in Custer, Washington include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.

When are property taxes due in Custer, Washington?

Property tax deadlines in Custer, Washington vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.

How can Ownwell help reduce my property taxes in Custer, Washington?

Ownwell provides professional property tax appeal services in Custer, Washington. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.