Permit Requirements: Federal Way vs Seattle
How do permit requirements rules compare between Federal Way, WA and Seattle, WA?
Federal Way and Seattle have similar restriction levels.
Federal Way, WA
King County
Fences up to 6 feet in residential zones do not require a permit in Federal Way. Fences over 6 feet, retaining walls over 4 feet, and critical area or shoreline fences require permits.
View full Federal Way rules →Seattle, WA
King County
Unincorporated King County requires a permit for fences over 6 ft tall and retaining walls over 4 ft. Fences at or under 6 ft usually need no permit but must meet setback and critical-area rules.
View full Seattle rules →Key Facts Comparison
| Fact | Federal Way | Seattle |
|---|---|---|
| Standard Fence | No permit up to 6 ft | - |
| Over 6 feet | Permit required | - |
| Retaining Wall | Permit over 4 ft | Permit over 4 ft |
| Permit Center | (253) 835-2607 | - |
| Permit Threshold | - | Over 6 ft tall |
| Code | - | KCC Title 16 and 21A |
| Department | - | Permitting Division |
| Critical Areas | - | Extra review (Title 21A.24) |
Highlighted rows indicate differences between cities.
Federal Way FAQ
Do I need a permit for a 6-foot fence in Federal Way?
No, standard residential fences 6 feet or shorter do not require a building permit, but must comply with zoning setbacks and sight triangles.
Does a Federal Way retaining wall need a permit?
Retaining walls over 4 feet tall require a building permit with engineering calculations. Shorter walls may not, unless they support a surcharge.
Seattle FAQ
Do I need a permit for a 6-foot wood fence in unincorporated King County?
Generally no. Fences 6 feet or less in height typically do not require a building permit, but they must still meet zoning setbacks and any critical-area rules under KCC Title 21A.
Who issues fence permits for unincorporated King County?
The King County Department of Local Services, Permitting Division at 206-296-6600. Applications require a site plan and, for tall fences, structural details.
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