Fences under 7 feet in height generally do not require a building permit in unincorporated King County. Fences must comply with KCC Title 21A zoning height limits (typically 6 feet rear/side, 4 feet front). Retaining walls over 4 feet require permits. Fences in critical areas may need additional review.
Under the Washington State Building Code as adopted by King County, fences that are under 7 feet in height do not require a building permit. This applies to all common fence types: wood, vinyl, chain-link, and metal. However, King County zoning regulations (KCC Title 21A) typically limit fence height to 6 feet in side and rear yards and 4 feet in front yards for residential zones. Fences exceeding the building code permit threshold (7 feet) require a permit with structural engineering. Retaining walls over 4 feet in height (measured from the bottom of the footing to the top of the wall) require a building permit and engineering calculations, regardless of whether a fence sits on top. Critical areas (wetlands, streams, steep slopes) governed by KCC 21A.24 may require wildlife-permeable fencing — solid fences in these areas could be restricted. Along shorelines managed under the Shoreline Management Act, fencing may require a Shoreline Substantial Development Permit if it could affect shoreline access or ecological functions. In rural residential zones, agricultural fencing (barbed wire, electric) is common and generally exempt from permits. Property owners are strongly advised to verify property lines with a licensed surveyor before fence installation, particularly in rural areas where boundaries may not be well-marked.
Fences exceeding height limits face code enforcement action requiring reduction to compliant height. Fences over 7 feet without permits face stop-work orders and retroactive permitting. Fences in critical areas that impede wildlife movement may be ordered modified or removed.
Kent, WA
Kent decibel limits follow WAC 173-60 and KCC 8.05 using EDNA zones. Residential receiving limit is 55 dBA day and 45 dBA night. Commercial sources are cappe...
Kent, WA
Kent industrial sources are capped at 70 dBA day and 65 dBA night at another industrial property, but only 60 dBA day and 50 dBA night when received at a res...
Kent, WA
Commercial trucks over 10,000 pounds GVWR generally cannot park on Kent residential streets except for active loading. Warehouse districts and truck routes h...
Kent, WA
Kent follows Washington State Building Code EV-ready requirements for new multifamily and commercial buildings. Public chargers exist at Kent Station and sev...
Kent, WA
Kent driveway aprons require Public Works approval under KCC Title 6. New or widened driveways need a right-of-way construction permit, and vehicles must not...
Kent, WA
Kent has no city requirement to split shared fence costs with a neighbor. Washington common law controls boundary fences. Survey the property line before bui...
Side-by-side rule comparisons with other cities in King County.
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