Shed Pads in Tampa FL | Size, Cost, 150 Sq Ft Permit Line

Shed Pads in Tampa, FL

A concrete shed pad in Tampa, FL is a flat slab a little bigger than the shed, set on compacted base and ready for hurricane anchors. Tampa Concrete Slabs pours shed pads and concrete slabs for garden sheds, workshops and metal kit buildings, sized with Hillsborough County's 150 square foot permit line in mind.

8x10 to 12x20 sheds

150 sq ft county line

Flood-zone exception

Anchor points cast in

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Pick the shed size before the shed pad

In unincorporated Hillsborough County the shed's size decides the paperwork. The county lists residential sheds and greenhouses under 150 square feet as work that needs no permit, and gives a permit checklist for accessory structures over 150. A 12x12 shed (144 square feet) stays under; a 10x16 (160) does not. The line is about the shed, so the pad can run a few inches wider than the walls.

Common shed sizes, the 150 sq ft line and pad cost

Shed	Shed area	Hillsborough County	Pad at projectcosted's Tampa rate (computed)
8x10	80 sq ft	Under 150: no county permit*	$444 to $887
10x12	120 sq ft	Under 150: no county permit*	$666 to $1,331
10x14	140 sq ft	Under 150: no county permit*	$777 to $1,553
12x12	144 sq ft	Under 150: no county permit*	$799 to $1,597
10x16	160 sq ft	Over 150: county permit	$888 to $1,774
12x16	192 sq ft	Over 150: county permit	$1,066 to $2,129
12x20	240 sq ft	Over 150: county permit	$1,332 to $2,662

Swipe the table sideways to see every column →

*Not in a flood hazard area, and in unincorporated Hillsborough County. Pad cost = shed area x $5.55 to $11.09 per sq ft (projectcosted, August 2026); the slightly larger pad and any minimum charge add to it. City of Tampa addresses: confirm the City's own threshold.

Shed pad thickness chart for Tampa FL: 4 inch shed pads at the low end of the 4 to 6 inch residential range — Our own diagram from the sources cited on this site. Not to scale.

The 150 square foot rule and its catch

The exemption has limits that most shed sellers never mention. The county says an exemption doesn't waive any other building code requirement, and it does not apply at all when the property is partly or entirely in a flood hazard area. Look up your lot on FEMA's flood map before you count on the exemption.

Over 150 square feet in the county

A Residential Miscellaneous building permit through HillsGovHub
A scaled site plan with the shed, existing buildings, property lines and setback distances
Easements, conservation areas and wetlands marked on the plan
Plans signed and sealed by a Florida architect or engineer, or approved DCA plans
Trees 12 inches or more in diameter noted, with removal permits if any come out
A recorded Notice of Commencement before the first inspection

Inside Tampa city limits, the City runs its own accessory structure permits through its online portal and its threshold may differ from the county's, so check with the City of Tampa before you size the shed. The Tampa slab permit guide and the flood zone guide cover both.

Small barn-style shed inside a fenced backyard — A small barn-style shed, the kind that often stays under 150 square feet.

Building a concrete pad for a shed

Four inches of concrete on a compacted base suits a storage shed. Florida's code doesn't require a vapor retarder under an unheated accessory structure, but a sheet of polyethylene under a shed that will store paper, tools or a future office keeps ground moisture out of it.

Square the pad to the shed's real outside dimensions, not the catalog size
Strip the sod; organic soil under a pad settles as it breaks down
Keep the top above the surrounding grade so storm water runs off, not in
Cast in anchor bolts or plan the anchor pattern before the pour
Check the setback from the property line before the forms go in

Timber forms staked out on bare ground for a large shed pad — Forms staked for a big shed pad, before base and concrete.

Gravel base or concrete slab under a shed

Gravel pad vs concrete shed pad

	Gravel pad	Concrete shed pad
Floor	Shed's own wood floor on skids	The slab is the floor, or the shed floor sits on it
Water	Drains through	Sheds water; pitch it away from the doors
Tie-downs	Ground anchors into the soil	Bolts or straps into concrete
Best for	Small wood sheds with floors	Metal kits, workshops, mower and golf cart storage

Swipe the table sideways to see every column →

Anchoring a shed against Tampa wind

Tampa's design wind speed sits around 150 to 160 mph and the city is inside the wind-borne debris region, so a shed that isn't tied down can become debris. The pad is where the tie-downs land. For a shed over 150 square feet, the sealed or approved plans the county asks for show how it's anchored. The hurricane wind and anchoring guide explains exposure categories and why the anchor is designed, not guessed.

Not a shed? See concrete pad installation for equipment pads, or shop slabs for a full workshop.

Shed Pads in Tampa, FL: Frequently Asked Questions

White vinyl shed beside a small paved sitting area

A vinyl shed set on a hard surface instead of grass.

Do I need a permit for a shed in Hillsborough County?

Not for a residential shed under 150 square feet in unincorporated Hillsborough County, unless the property is partly or fully in a flood hazard area, where the exemption does not apply. Over 150 square feet the county asks for a building permit with a site plan and sealed or DCA-approved plans. Inside Tampa city limits, check the City's own rule.

How big should a concrete pad for a shed be?

Slightly bigger than the shed's outside footprint, so the walls bear fully on concrete instead of the crumbly edge. A few inches past each wall is the usual approach; follow the shed maker's instructions if they want the pad flush.

How thick should a concrete pad for a shed be?

Four inches, the low end of the 4 to 6 inch range HomeBlue gives for Tampa residential slabs, suits a storage shed. A workshop with heavy machines, or a shed for a riding mower or golf cart, is worth going thicker with more steel.

How much does a concrete slab for a shed cost in Tampa?

A 10x12 pad (120 square feet) computes to about $666 to $1,331 at projectcosted's August 2026 Tampa rate, and a 12x16 (192 square feet) to about $1,066 to $2,129. HomeBlue's Tampa table puts a 10x10 at $900 to $1,500.

Does a shed on a concrete slab need hurricane anchors?

Tampa sits in the wind-borne debris region with design winds around 150 to 160 mph, so a shed should be tied to its pad. Sheds over 150 square feet go through the county permit with sealed or approved plans, and those plans show the anchoring.

Is a gravel pad or a concrete slab better for a shed?

Gravel drains and costs less; a concrete slab gives a solid floor, a place to anchor into, and no wood floor sitting on wet ground. For a metal kit shed with no floor, or anything you roll equipment into, concrete wins.