Anaheim exempts detached sheds of 120 square feet or less from building permits under California Residential Code Section R105.2, but zoning setback, height, and lot coverage rules still apply. Anything over 120 square feet or with plumbing and electrical requires a building permit from the Anaheim Planning and Building Department.
The California Residential Code, adopted by reference under Anaheim Municipal Code Title 15 Buildings and Construction, exempts one-story detached accessory structures used as tool and storage sheds from building permit requirements when the floor area is 120 square feet or less. This is a statewide exemption that Anaheim follows. Even exempt sheds must comply with zoning code 18.46 accessory structure standards, including a minimum 3-foot setback from side and rear property lines, no placement in the front yard setback, maximum 12-foot height, and inclusion in overall lot coverage calculations. Sheds larger than 120 square feet require a full building permit, structural plans, and inspections. Any shed with plumbing fixtures, HVAC, or permanent electrical wiring beyond a single low-voltage circuit requires permits regardless of size. Prefabricated metal and resin sheds still need zoning compliance even when a building permit is exempt. In Anaheim Hills fire-hazard severity zones, sheds within 100 feet of a home must be built from ignition-resistant materials and maintain defensible-space clearance. If the property has an HOA, many communities in Anaheim Hills and The Colony historic district require separate architectural review before any shed is installed. Permits can be obtained through the Anaheim online permit portal or in person at 200 S Anaheim Blvd.
Contact your local code enforcement office for specific penalty information.
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See how Anaheim's shed & outbuilding permits rules stack up against other locations.
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