Shed Rules: Bellevue vs Seattle
How do shed rules rules compare between Bellevue, WA and Seattle, WA?
Seattle has fewer restrictions than Bellevue.
Bellevue, WA
King County
Bellevue regulates detached sheds under LUC 20.20.125. Structures under 200 sq ft are exempt from building permits but must still meet Land Use Code setbacks. Rear setback is 5 feet.
View full Bellevue rules →Seattle, WA
King County
One-story detached accessory structures (sheds, playhouses) under 200 sq ft do not require a building permit under Washington State Building Code (IRC). Structures in Environmentally Critical Areas require additional ECA review regardless of size. Setback and zoning requirements apply.
View full Seattle rules →Key Facts Comparison
| Fact | Bellevue | Seattle |
|---|---|---|
| Permit Exempt | Under 200 sq ft | - |
| Max Coverage | 10% of lot | - |
| Rear Setback | 5 feet minimum | - |
| Street Setback | 10 feet minimum | - |
| Code | LUC 20.20.125 | - |
| Permit Threshold | - | No permit if ≤ 200 sq ft (non-ECA) |
| ECA Exception | - | ECA review required in critical areas |
| State Code | - | WA Building Code (IRC) per RCW 19.27 |
| SDCI | - | Contact for site-specific guidance: (206) 684-8600 |
Highlighted rows indicate differences between cities.
Bellevue FAQ
Do I need a permit for a backyard shed in Bellevue?
No building permit is required for sheds under 200 sq ft, but you must still meet all Land Use Code setbacks and lot coverage rules under LUC 20.20.125.
How close to my fence can I build a shed?
The default rear setback is 5 feet. With a recorded written agreement from your neighbor, you may build closer if the shed is 15 feet or shorter and covers no more than half the required setback area.
Seattle FAQ
Do I need a permit for a shed in Seattle?
One-story detached accessory structures (sheds, playhouses) under 200 sq ft do not require a building permit under Washington State Building Code (IRC). Structures in Environmentally Critical Areas require additional ECA review regardless of size. Setback and zoning requirements apply.
How big can a shed be without a permit in Seattle?
Permit Threshold: No permit if ≤ 200 sq ft (non-ECA). ECA Exception: ECA review required in critical areas. State Code: WA Building Code (IRC) per RCW 19.27. SDCI: Contact for site-specific guidance: (206) 684-8600.
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