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

Permit forms and application materials

We issue land use, building, mechanical, fire regulatory and operating permits for unincorporated areas of King County.

Permit forms, application materials, and resources

Learn how to apply for land use, building, and fire regulatory and operating permits, and a limited number of business licenses in unincorporated areas of the county.

Permit fees

Fee guides for building and land use permits effective January 1, 2023.

ProjectDox

King County is excited to introduce ProjectDox, a digital plan review tool provided by Avolve Software. Learn more about this development in the world of permitting technology.

Submit permits

Find out how to submit your building or land use permits.

Permit timelines

Find timelines for common types of building and land use permit applications.

Single-family residential permit

For new construction, and additions/alterations to existing homes and duplexes, including owner improvements.

Fire and special event permit

Find out how to apply for permits involving flammable liquid tanks, fireworks, fire systems, and special events.

Land use permit types

Includes clearing and grading, rezoning, right-of-way use, land division, tree removal, and other land permits from the Permitting Division.

Commercial and multi-family permit

For new construction, and additions or alterations to existing buildings, including commercial tenant improvements.

Permitting reports

Find report readouts on new applications, issued permits, and permit performance.

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