West Seattle, WA: Property Tax -- King County, Directly
Washington has no state personal income tax, which shifts more of the weight of funding schools, fire protection, and local government onto property tax, sales tax, and a business-and-occupation tax than in states that also tax wages. In West Seattle specifically, the structural fact worth getting right first is that Seattle does not levy a separate municipal property tax the way many U.S. cities do -- property here is valued and taxed by the King County Assessor's office directly, with the city's own share folded into that one combined county bill rather than billed separately.
Why Seattle Not Having Its Own Property Tax Levy Matters Here
Unlike Gig Harbor (an incorporated city inside Pierce County that layers its own municipal levy on top of the county's) or Bainbridge Island (an independently incorporated city in Kitsap County), West Seattle is simply a neighborhood of the City of Seattle, and Seattle itself does not impose a separate city-level property tax. Instead, every Seattle address -- West Seattle included -- is billed through one combined levy administered by the King County Assessor's office, made up of a state schools portion, a local school district portion, a King County portion (which functionally includes the city's needs), and various special-purpose district levies including fire protection, the port, and library and parks districts depending on the specific parcel. A buyer moving from a market with a separate city tax bill and a separate county tax bill should understand that West Seattle collapses those into one bill from one office.
This is confirmed directly via the King County Assessor's own published levy and taxing-district materials (kingcounty.gov/assessor), which list the current Assessor as John Wilson and publish an annual 'Codes and Levies' rate book breaking down exactly which taxing districts apply to a given parcel code. That rate book, not a general online estimator, is the authoritative source for a specific West Seattle address's actual levy composition.
Washington's Statutory 1% Levy-Limit Framework
Washington property tax operates under a statutory constraint commonly called the "1% levy limit" -- per the Washington Department of Revenue's own published guidance, this framework caps how much most individual taxing districts, including King County itself, can grow their total regular property tax levy from one year to the next, absent voter approval of a levy lid lift or a new voted levy. It traces back to a series of statewide ballot measures in the 1990s, including Referendum 47, that reshaped how the state limits local property tax growth.
The important thing for a West Seattle buyer to understand: that 1% figure limits a taxing district's total levy growth, not an individual homeowner's tax bill or rate directly. Rising assessed values, voter-approved special levies (a school bond, a King County Metro transit measure, a fire or library district levy), and each taxing district's own budget decisions all still affect what a specific property owner actually pays from year to year -- which is exactly what King County's own 2026 numbers show, described below.
A Real, Recent Example: King County's 2026 Countywide Numbers
King County's own 2026 property tax reporting is a useful, concrete illustration of how the layered-levy system plays out in practice at the county scale that governs West Seattle directly. Per the King County Assessor's own published 2026 tax-year materials, total countywide assessed property value grew from roughly $873 billion in 2025 to roughly $920 billion in 2026 -- about a 5.4% increase -- while total countywide property tax collected rose from roughly $7.7 billion to roughly $8.4 billion, a jump of about 10%. A recently cited combined Seattle-area total levy rate ran near $9.90845 per $1,000 of assessed value.
That gap between roughly 5.4% assessed-value growth and roughly 10% total-tax growth is a real, specific illustration of how voter-approved levies (transit, schools, parks, and similar measures) can push total collections up faster than the 1% base-levy-growth limit alone would allow -- the same dynamic described generically above, made concrete with King County's own current numbers.
Why Two West Seattle Homes Can Carry Different Bills
Because a West Seattle property tax bill is the sum of several separately certified levies -- state schools, Seattle Public Schools, King County, port, fire (where applicable), and any voter-approved special levies -- two homes with similar assessed values can still carry meaningfully different tax bills depending on which specific special-purpose districts and voted measures apply to that exact parcel. This page does not state a single, confirmed, current all-in tax rate for a 'typical' West Seattle home, since the actual figure requires pulling the current certified levy roll for a specific parcel, which the King County Assessor's own site can do by address.
Confirm the exact rate breakdown and levy stack for any specific parcel directly with the King County Assessor's office (kingcounty.gov/assessor) rather than assuming a citywide or countywide average applies to a specific address.
Seattle Public Schools and Voter-Approved Levies
Seattle Public Schools, the district serving West Seattle, relies in part on voter-approved local levies layered on top of the state school-funding portion of the property tax bill -- the same kind of multi-year, voter-renewed levy structure described in Gig Harbor's and other Puget Sound markets' property tax pages on this site, just administered by a different district. This page does not have a confirmed, current-year specific dollar-per-$1,000 figure for Seattle Public Schools' own local levy rate, since that changes on its own multi-year renewal cycle -- confirm current levy rates directly with the district or the King County Assessor rather than assuming a prior year's figure still applies.
This is exactly the kind of voter-renewed line item that can meaningfully move a homeowner's total bill independent of the county's own 1%-limited base levy, and it's worth asking about specifically when evaluating the ongoing cost of a specific West Seattle property.
What This Page Won't Guess, and Where to Get a Real Answer
In the interest of not printing a number this site can't stand behind: this page does not state a single, current, all-in property tax rate or dollar figure for a 'typical' West Seattle home. That figure genuinely varies parcel by parcel based on assessed value and the specific combination of taxing districts that apply, and would require pulling the current certified levy roll for a specific address.
The correct, current source is the King County Assessor's office directly -- online at kingcounty.gov/assessor or by phone -- which can confirm a specific parcel's assessed value, current combined levy rate, and how the state, county, school, and any special-district portions break down for that address. Also ask directly about the Senior Citizen and Disabled Persons property tax exemption or deferral program, administered under the same framework the Washington Department of Revenue authorizes statewide, if age, disability status, or income might make a household eligible.
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Get a Free Agent Referral →Independent research. No ads. No sponsored listings. Washington funds state and local government without a personal income tax, leaning instead on property, sales, and business taxes -- a structure documented on the Washington State Department of Revenue's own site (dor.wa.gov). The state's 1% property tax levy-growth limit, with roots in 1990s ballot measures including Referendum 47, is described in the Department's own published guidance. The fact that Seattle levies no separate municipal property tax, with all Seattle addresses billed through one combined King County levy, and the King County Assessor's own name (John Wilson) and annual Codes and Levies rate book, are sourced to the King County Assessor's own website (kingcounty.gov/assessor). The 2026 countywide assessed-value growth (roughly $873B to $920B, about 5.4%), total countywide property tax growth (roughly $7.7B to $8.4B, about 10%), and the roughly $9.90845-per-$1,000 total levy rate figure are sourced to the King County Assessor's own 2026 property tax materials and corroborating reporting via Virtuance's and Seattle's Mortgage Broker's Seattle property tax explainers. This page does not state a single, current, all-in tax rate for a 'typical' West Seattle home, or a current Seattle Public Schools local levy rate -- neither was confirmed to a level this page treats as reliable, and this page discloses that as an open gap rather than filling it with an unconfirmed number. Levy rates, exemption eligibility, and taxing district boundaries are set by state law, county administration, and local ballot measures, and can change from what's described here. This page is independent research, not legal or tax advice; confirm all current figures directly with the King County Assessor, the Washington State Department of Revenue, and a licensed Washington tax professional or CPA before making a purchase or relying on any number here for a financial decision.