State Bill 5290 implementation

Effective January 1, 2025, all permit development agencies in Washington—including Unincorporated King County—will implement State Bill 5290. Learn more

Temporary move during election season

Due to expected heavy traffic at the King County Elections Building, King County Permits customer service hours will temporarily move to the Renton Library (100 Mill Avenue S).
When: October 24 – November 7, on Mondays and Thursdays from 10:30 am to 3:30 pm

Public notices and permit records research

Learn more about projects that require public notice, and how to research permitting records.

Permit records research

Learn how to research building and land use permits that have been finalized, closed, or are still active in unincorporated King County.

Public notices

Applicants for certain land use actions or permit types described in chapter 20.20 of the King County Code are required to provide public notification. The State Environmental Policy Act of 1972 (SEPA) also requires public notification of environmental threshold determinations for these applications and other actions.