Marysville, WA Accessory Structures: Shed & Carport Rules (2026)
Shed permit rules in Marysville, WA, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.
Key Facts
- Side setback
- 5 feet
- Rear setback, one-story
- 5 feet
- Footprint cap (under 1 acre)
- 80% of house footprint
- Height limit
- 20 ft (under 1 acre); 30 ft otherwise
Summary
Marysville caps residential accessory structures at 80 percent of the primary home's footprint on lots under an acre, with a 5-foot side setback, a 5-foot one-story rear setback, and a 20-foot height limit unless the lot exceeds an acre.
Side setback ... 5 feet ... Rear yard setback ... 5 feet (one-story structure); 10 feet (when the entrance faces the rear yard or for two-story or greater structure in PRDs); 15 feet (two-story structure ...) ... Accessory structure footprint ... On lots under one acre, accessory structures are further limited to 80 percent of the footprint of the primary residence. ... Height ... 20 feet (lots under one acre); or 30 feet (lots over one acre, or lots under one acre where the accessory structure contains an accessory dwelling unit)
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4922912; v1 updated 2026-06-08; through 06-08-2026).
Full Breakdown
Sheds, detached garages, and other accessory structures in Marysville's residential zones go through community development director review against a standard dimensional table. Side setback is a flat 5 feet; rear yard setback starts at 5 feet for a one-story structure and climbs to 10 or 15 feet depending on entrance orientation or building height. On lots under one acre, the structure's footprint can't exceed 80 percent of the primary residence's footprint, and height tops out at 20 feet: rising to 30 feet only on lots over an acre, or on smaller lots where the structure holds an accessory dwelling unit.
Violations & Fines
Building an accessory structure that exceeds the applicable setback, the 80 percent footprint cap relative to the primary residence, or the 20-foot height limit (30 feet where an ADU or larger lot applies) is a zoning violation reviewable by the community development director, who can also require corrective adjustments.
Frequently Asked Questions
How big can a shed be relative to my house in Marysville?
What's the setback for a shed from my side property line in Marysville?
Sources & Official References
Other rules in Marysville
How Marysville compares: Shed Permit Requirements by City·Compare Marysville to another location·View the Washington accessory structures overview
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Shed & Carport Rules in Nearby Cities
How other cities in Snohomish County handle shed & carport rules.