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Property Tax History

Enter an address and you will get the historical assessment and property tax for every property!

How we got here
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Coming soon for County

Whatcom County is live now. We're rolling out the rest of Washington — your county next. The data is public; we make it readable.

Enter your email and we'll let you know when County goes live.

We'll switch you to Whatcom County and pre-fill a sample address so you can run a real lookup.

Source: Whatcom County Assessor's annual MDB exports (2005-2025) + Annual Tax Books (2001-2026).

01 · Why this exists

Voters passed a 1% cap. The bill went up 77% anyway.

Washington's RCW 84.55 limits how much an existing taxing district can grow its regular levy each year — by 1%. Whatcom County's total property tax revenue grew from $295M in 2017 to $523M in 2026 — a 77.4% increase over nine years. The cap, on its terms, would have allowed about 9.4%.

The gap is real, but the cap isn't being broken — it's being routed around. New voter-approved levies, lid lifts, special districts, and reassessment relative to neighbors all sit outside the 1% rule. Each was approved at a meeting most people didn't follow, or on a ballot most people didn't read closely.

This page exists to make the routing transparent at the parcel level. You see how your tax was actually calculated, which jurisdictions got which share, and which line items grew the fastest since 2018. Then you decide whether that pattern is fine or worth a closer look.

The rules that set your housing
costs were written in public.

We read them. We write it up. We send it to you — free.

Start with the briefings