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Updated 2025 Tax Year

Snohomish County
Property Tax Guide

Everything you need to know about property taxes in Snohomish County, WA. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
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Quick Facts
Tax Rate
0.7% - 1.5%
Exemptions
4+ Available
Section 1

How Property Tax Works

Snohomish County's property tax system serves as the primary funding source for essential local services including schools, fire protection, libraries, parks, and county operations. Property taxes in Snohomish County will total $1.851 billion in 2025, representing a 5.96% increase from 2024's $1.747 billion across all taxing districts. This increase reflects growing community needs and infrastructure demands in one of Washington's fastest-growing counties.

The county operates under Washington State's levy rate system, where taxes are calculated based on your property's assessed value multiplied by the applicable levy rates from various taxing districts. Snohomish County has 112 different levy rates for 2025, ranging from a low of $0.02054 per $1,000 of assessed value to a high of $1.85302 per $1,000. Your specific tax rate depends on your property's location and which taxing districts serve your area, including school districts, fire districts, library districts, and other special purpose districts.

Section 2

What Makes Up Your Tax Bill

Tax ComponentTypical Rate Range (per $1,000 assessed value)Purpose
School Districts$4.00 - $8.00K-12 education, facilities, operations
County General$1.50 - $2.50County services, roads, courts, sheriff
City/Municipal$1.00 - $3.00City services, police, parks, utilities
Fire Districts$0.50 - $1.50Fire protection, emergency medical services
Library Districts$0.30 - $0.60Public library operations and facilities
Port Districts$0.10 - $0.40Economic development, transportation
Hospital Districts$0.20 - $0.75Public health services, hospitals
Special Districts$0.10 - $1.00Flood control, parks, utilities, other services
Total Effective Rate$8.00 - $17.00Combined rate varies by location

Property tax rates in Snohomish County are determined through a complex process involving multiple taxing districts. Each January, the Assessor's Office calculates levy rates based on the budgets submitted by various taxing districts and voter-approved measures. The levy rate formula divides each district's total levy amount by the total assessed value of all property within that district. This ensures that the tax burden is distributed proportionally among property owners based on their property values, with the assessment ratio for real property in Snohomish County at 92.7% of market value for 2025 taxes.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Snohomish County, property taxes are due in two installments:

Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

In Snohomish County, supplemental property taxes may be assessed when significant changes occur to your property after the January 1 assessment date. The most common trigger for supplemental taxes is new construction that increases your property's value. When construction is completed after July 31 of the assessment year, the added value is typically assessed as "new construction" and added to the following year's assessment roll.

Common Supplemental Tax Scenarios:

  • New Construction: Completing a home addition, new garage, or finishing a basement after July 31
  • Property Improvements: Adding a deck, pool, or other permanent structures
  • Commercial Development: New buildings or major renovations to existing structures
  • Change of Use: Converting property from one use category to another

Calculation Process: Supplemental taxes are calculated using the same levy rates that apply to your regular property taxes. The Assessor determines the added value from the improvement and multiplies it by your area's combined levy rate. For example, if you complete a $50,000 home addition and your total levy rate is $12.50 per $1,000 of assessed value, your supplemental tax would be approximately $625 ($50,000 ÷ $1,000 × $12.50).

Timeline and Payment: Supplemental tax bills are typically issued after the improvement is completed and inspected. These taxes are due within the same timeframe as regular property taxes, with first half payments due April 30th and second half payments due October 31st. Property owners receive separate supplemental tax statements in addition to their regular annual tax statements.

Example Calculation
$300,000 Home$2,051/year
Assessed Value:$300,000
Less Homeowners' Exemption:-$7,000
Net Taxable × 0.7%:$2,051
Monthly (Escrow):$171
$600,000 Home$4,151/year
Assessed Value:$600,000
Less Homeowners' Exemption:-$7,000
Net Taxable × 0.7%:$4,151
Monthly (Escrow):$346
$1,000,000 Home$6,951/year
Assessed Value:$1,000,000
Less Homeowners' Exemption:-$7,000
Net Taxable × 0.7%:$6,951
Monthly (Escrow):$579

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Section 5

Escrow & Property Taxes

Property Details: Single-family home in Everett

  • Assessed Value: $300,000
  • Combined Levy Rate: $11.25 per $1,000 assessed value

Calculation Steps:

  1. Assessed Value ÷ 1,000 = $300,000 ÷ 1,000 = 300
  2. Tax Units × Levy Rate = 300 × $11.25 = $3,375
  3. Annual Property Tax: $3,375
  4. First Half Payment (due April 30): $1,687.50
  5. Second Half Payment (due October 31): $1,687.50
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Section 6

Frequently Asked Questions

Property Details: Single-family home in Bothell with senior exemption

  • Market Value: $600,000
  • Assessed Value: $600,000
  • Senior Exemption: $75,000 maximum income qualifying for partial exemption
  • Combined Levy Rate: $13.50 per $1,000 assessed value

Calculation Steps:

  1. Assessed Value ÷ 1,000 = $600,000 ÷ 1,000 = 600
  2. Tax Units × Levy Rate = 600 × $13.50 = $8,100
  3. Less Senior Exemption (assuming 50% reduction): $4,050
  4. Annual Property Tax: $4,050
  5. First Half Payment (due April 30): $2,025
  6. Second Half Payment (due October 31): $2,025
Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
Tax Doc
2025 Property Tax Informationsnohomishcountywa.gov
02
Tax Doc
2025 Property Tax Informationsnohomishcountywa.gov
03
Tax Doc
2026 Property Tax Informationsnohomishcountywa.gov
04
by Chris Huyboom Levy Comptroller October 8, 2025snohomishcountywa.gov
05
County
Property tax ratios by county 2024 for 2025 taxesdor.wa.gov
06
County
Treasurer | Snohomish County, WA - Official Websitesnohomishcountywa.gov
07
County
Property Tax Interest | Snohomish County, WAsnohomishcountywa.gov
08
Tax Doc
General Tax Informationsnohomishcountywa.gov
09
Tax Doc
Quarter 4, 2025 - Local sales and use tax rates sorted by citydor.wa.gov
10
Tax Doc
senior citizens and people with disabilities property tax ...snohomishcountywa.gov
All sources verified as of 2025 Tax Year

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