FeeHistory · the dated record of overwrite-in-place gov fees & rates

King County, WA — tracked fees & rates

Field	Current	History
King County, WA effective property-tax rate	0.92%	since 2026-06-22

How this works. Government bodies publish a fee or rate and overwrite the old number when it changes — almost none keep a public dated history. We snapshot append-only and hash each observation, so we become the record of what a value was on a given date. Day-1 history is thin and we say so — the immediate value is the forward change-alert; the deep dated history compounds as we keep polling.

Diff API · Change alerts · x402 / agents · All jurisdictions

Related tools

ParcelEdge Your property-tax appeal deadline + over-assessment check.LegalDeadline Statute-of-limitations deadline by state + claim.LienClock Mechanics-lien filing deadline by state.DropWatch All DropWatch verification + alert tools.