King County Washington Fence Permit Guide

In unincorporated King County, fence permit needs depend heavily on height, parcel zoning, setbacks, and whether the property is inside a city.

Permit takeaway

King County says fences up to six feet in height may be built on or within property lines without a permit in unincorporated King County, while fences over six feet require a permit.

Zoning and placement

Fences over six feet must meet required setbacks for the parcel's zoning, and city properties follow the city's permit rules rather than King County's.

Building and trade review

Fence information is tied to the residential addition/remodel decks, garages, and sheds packet, with zoning and building questions handled by King County Permits.

Call before applying when

Call before applying if the fence is over six feet, near a road or easement, on a critical area parcel, inside city limits, or part of a retaining wall or pool barrier.

Documents to prepare

• Property jurisdiction
• Fence height
• Fence location
• Setback information
• Site plan for permit-required fences

Inspection planning

• Confirm unincorporated jurisdiction
• Check height and setbacks
• Apply if over six feet or otherwise required
• Keep approval records
• Schedule any required inspection

Official sources

• King County Fences Building Permit Regulations
• King County Residential Addition/Remodel Service Detail
• King County Permits

This guide is a planning summary. Always verify the current requirements with the local office before starting work.