Shed permit rules in Sunnyvale, CA β also referred to as storage shed, backyard shed, or accessory building regulations β set size limits, setbacks, and when a building permit is required.
Sunnyvale allows backyard sheds up to 120 square feet without a building permit under Municipal Code Chapter 19.38. Sheds must meet setbacks and cannot be used as living space or connected to utilities.
Sunnyvale Municipal Code Chapter 19.38 governs accessory structures including sheds, playhouses, and gazebos. One-story detached sheds with a floor area of 120 square feet or less and no plumbing or permanent electrical wiring are exempt from building permits under the California Building Code Section 105.2 and the Sunnyvale Zoning Code. Sheds must still comply with zoning setbacks, typically three feet from side and rear property lines, and cannot exceed 10 feet in height. Larger sheds over 120 square feet require a building permit including a site plan, foundation details, and structural drawings. Sheds may not be used as habitable space, short-term rental units, or bedrooms. Prefabricated sheds from major retailers often meet the under-120 threshold when installed on grade.
Contact your local code enforcement office for specific penalty information.
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