Delridge property taxes track Seattle’s 0.99 percent effective rate, but the King County mass-appraisal model misfires on Delridge homes in distinctive ways. Here is how to spot it.
Delridge runs north-south along Delridge Way through the eastern half of West Seattle, with diverse housing stock, a long commercial spine, and a mix of older homes and recent infill. The 2026 King County Assessor median assessed value across Seattle is $833,000 at an effective rate near 0.99 percent, producing a citywide median bill around $8,000 — but the bill that lands on a Delridge home depends on the model’s neighborhood-level math, which is where the gaps appear.
How are Delridge property taxes calculated?
King County reassesses every Seattle property every year, including every parcel in Delridge. The Assessor’s mass-appraisal model weights square footage, year built, lot size, and recent neighborhood sales, then applies the combined Seattle levy rate (around 0.99 percent for 2026) to the result. Voter-approved levies for schools, transit, parks, and city services layer on top of the state and county base.
What the model rarely picks up are the property-specific and Delridge-specific factors that buyers actually price into offers — and that is where most appeals are won. Anchored by Delridge Way SW, Westcrest Park, and the Longfellow Creek corridor, Delridge’s housing stock has its own quirks the citywide model does not always capture.
Where does the Assessor get Delridge wrong?
Delridge runs through a deep valley between two West Seattle ridges. Homes on the valley floor near Longfellow Creek face drainage and slope issues that depress sale prices; homes on the western ridge looking toward Puget Sound carry partial-view premiums. The mass-appraisal model often treats valley-floor homes and ridge homes as a single submarket when the buyer pool clearly does not.
Identify whether your home is on the valley floor, the western ridge, or the eastern slope, and pull comps strictly within the same topographic tier. Drainage issues on valley-floor homes — French drains, sump pumps, winter water intrusion — are documentable condition issues the model rarely captures. Photo evidence of any drainage work, plus tier-tight comps, is the cleanest case at the BOE.
Delridge comps to North Delridge (north end) and South Delridge (south end). Highland Park is a tertiary set for southern Delridge homes. A tight comp set drawn from genuinely similar homes — same submarket, similar size and age, similar condition — is what moves a Delridge appeal at the King County Board of Equalization.
What does a Delridge appeal actually look like?
Delridge homeowners appeal through the King County Board of Equalization, the same independent panel that hears every Seattle and King County appeal. The 2026 filing window runs through July 1, or 60 days after your Official Property Value Notice mails, whichever is later. The hearing is short, usually 15 to 30 minutes by phone, and the Board wants concrete evidence: comparable sales, documented condition issues, or an outright error in the property record.
For the broader Seattle context, see the Seattle property taxes guide or the 2026 King County property tax appeal guide.
Is a Delridge appeal worth filing?
At Seattle’s 0.99 percent effective rate, every $10,000 of assessed-value reduction is roughly $100 off the annual bill. A 10 percent reduction on a typical Delridge home (recent sale prices around $700,000, assessed values somewhat lower) pulls roughly $600 a year off the bill, and reductions tied to documented evidence often land larger. Most Delridge homes have at least one angle worth pursuing — the question is which one.
FairAppeal handles the full process from review through hearing, and only charges a percentage of first-year tax savings if the appeal actually reduces your taxes. Enter your address on the homepage for a free review — the 2026 window is still open.