Interbay Property Taxes (Seattle): The 2026 Homeowner Guide

Interbay is the industrial-and-commercial belt between Magnolia and Queen Anne, with a golf course, the National Guard Armory, and very little single-family residential. Seattle's 2026 median assessed value is $833,000 at a ~0.99 percent effective rate, about $8,000 a year, but the bill on a Interbay home turns on neighborhood-level math.

If your property tax bill feels too high, the savings math below uses your own numbers. For a personalized review of your Interbay home (a comp pull, a property record check, and a real savings estimate), enter your address on the homepage. The review is free; Fair Appeal only collects a percentage of first-year tax savings when the appeal actually wins.

How are Interbay property taxes calculated?

King County reassesses every Seattle property every year, including every parcel in Interbay. 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 Interbay-specific factors that buyers actually price into offers, and that is where most appeals are won. Anchored by the BNSF rail corridor, Interbay Golf Center, and 15th Avenue West, Interbay’s housing stock has its own quirks the citywide model does not always capture.

Where does the Assessor get Interbay wrong?

Interbay's small single-family footprint sits surrounded by industrial, commercial, and rail use. The defining overassessment pattern is industrial-adjacency drag, the same pattern that drives Kent appeals, just in a smaller geography.

Photograph the industrial frontage closest to your parcel. Pull comps from homes a few blocks away that are not industrial-adjacent and show the price-per-square-foot delta. The discount is well documented and BOE-accepted.

Interbay single-family comps to the western edge of Queen Anne and the eastern edge of Magnolia. A tight comp set wins these cases.

What does an Interbay appeal actually look like?

Interbay 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 an Interbay 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 Interbay home (recent sale prices around $850,000, assessed values somewhat lower) pulls roughly $800 a year off the bill, and reductions tied to documented evidence often land larger. Most Interbay 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. the 2026 window is still open.