Fence Permits: Kent vs Seattle
How do fence permits rules compare between Kent, WA and Seattle, WA?
Kent and Seattle have similar restriction levels.
Kent, WA
King County
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.
View full Kent rules →Seattle, WA
King County
Most residential fences in Seattle do not require a building permit. Fences 8 feet or shorter without masonry or concrete above 6 feet are exempt. Fences in flood-prone areas, shoreline zones, or environmentally critical areas may need additional review.
View full Seattle rules →Key Facts Comparison
| Fact | Kent | Seattle |
|---|---|---|
| No Permit | Under 7 feet | - |
| Zoning Limits | 6 ft rear/side, 4 ft front | - |
| Retaining Wall | Permit if >4 feet | - |
| Critical Areas | Wildlife-permeable required | - |
| Permit Exempt | - | 8 feet or shorter, non-masonry above 6 ft |
| Residential Max | - | 6 ft side/rear, 4 ft front |
| Flood Zones | - | Additional review required |
| Retaining Walls | - | Permit required over 4 feet |
Highlighted rows indicate differences between cities.
Kent FAQ
Do I need a permit for a fence in King County?
Fences under 7 feet do not need a building permit. However, they must comply with zoning height limits — typically 6 feet for side/rear and 4 feet for front yards. Retaining walls over 4 feet always require permits.
Are there special fence rules near streams in King County?
Yes. Fences in critical area buffers (near streams, wetlands, steep slopes) may need to be wildlife-permeable under KCC 21A.24. Solid fences that block wildlife corridors can be restricted or prohibited.
Seattle FAQ
Do I need a permit to build a fence in Seattle?
No, most residential fences do not need a permit. Fences 8 feet or shorter without masonry above 6 feet are exempt. Fences in flood-prone or environmentally critical areas may need review.
What is the maximum fence height in Seattle residential areas?
6 feet in side and rear yards (plus 2 feet of trellis), and 4 feet in front yards for neighborhood residential zones.
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