Shed permit rules in Snohomish County, WA — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Washington adopts the International Residential Code statewide; detached one-story sheds 200 square feet or less are exempt from building permits.
Under RCW 19.27.031 and chapter 51-51 WAC, Washington adopts the International Residential Code (IRC) as the statewide residential building code. IRC Section R105.2 exempts one-story detached accessory structures of 200 square feet or less from building permits, although electrical, plumbing, and zoning rules still apply. Local jurisdictions may not adopt residential code amendments less stringent than the state code, but may impose additional zoning setback requirements. Electrical permits are administered by the Department of Labor and Industries under RCW 19.28.
Building without a required permit can trigger stop-work orders and double permit fees under local enforcement of the state code.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Snohomish County, WA
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