Shed permit rules in St. Johns County, FL — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
A one-story storage shed of 120 square feet or less needs no building permit in St. Johns County under Florida Building Code Section 105.2, but it must still meet zoning setbacks and be anchored against hurricane wind loads.
Florida Building Code Section 105.2 exempts a one-story detached accessory structure used as a tool or storage shed from a building permit when its floor area is 120 square feet or less. The exemption is only from the building permit — the shed still has to meet St. Johns County setbacks, stay out of any required front yard, and be anchored to resist the county's hurricane design wind speed. When a shed stands 10 feet or more from the main house, its required setback drops to 3 feet from the side and rear lot lines. A shed over 120 square feet, or one inside a special flood hazard area, needs a permit.
A shed over 120 square feet without a permit, or any shed placed in a required yard or left unanchored against wind load, draws a code enforcement correction.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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