Shed permit rules in Hayward, CA — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Sheds up to 120 square feet are exempt from building permits in Hayward but must meet zoning setbacks of 3 feet from side and rear lines.
Hayward follows California Residential Code Section R105.2, which exempts one-story detached accessory structures used as tool and storage sheds, playhouses, and similar uses from building permits if the floor area does not exceed 120 square feet and the eave height does not exceed 12 feet. Despite the permit exemption, sheds must still comply with Hayward zoning: minimum 3-foot setback from side and rear property lines, no shed may occupy a required front yard, and total lot coverage including accessory structures is capped by zoning district. Sheds over 120 sq ft, any shed with electrical or plumbing, or sheds on a permanent foundation require a building permit and must meet full California Building Code standards. Sheds cannot be used as sleeping or habitable space; that triggers ADU review instead.
Contact your local code enforcement office for specific penalty information.
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Side-by-side rule comparisons with other cities in Alameda County.
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