Fence Permits: Federal Way vs Seattle
How do fence permits rules compare between Federal Way, WA and Seattle, WA?
Federal Way and Seattle have similar restriction levels.
Federal Way, 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 Federal Way 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 | Federal Way | 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.
Federal Way 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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