How much does a concrete slab cost in Jacksonville?
Pads and slabs price off the load and the ground: reinforcement scaled to the use, a sandy base compacted near the river, and grading that runs water off. As a rough band, most pads and slabs land around $7 to $13 per square foot, depending on the thickness and whether a vapor barrier is in play. We scale and price each one to the load the pad is built to carry.
What reinforcement goes in a slab here?
For most residential pads it is structural fiber blended into the mix and welded wire mesh run through the slab, the standard Northeast Florida build. When the load is genuinely heavy or structural, say a shop floor that parks trucks, we step up to a steel rebar grid, which is the work rebar was made for. We fit the reinforcement to the real load instead of burying steel in a light pad, where near the port it just invites corrosion.
How thick does my slab need to be?
It follows the load. A shed pad weighs a fraction of what a garage or shop floor loaded with vehicles and gear has to carry, so we set thickness and reinforcement to your actual use and factor in Duval's sandy ground and the river-fed water table sitting close beneath it.
Will a slab hold a hot tub, RV, or boat?
Yes. These are heavy, concentrated loads, so we add depth and reinforcement and bring in rebar wherever the load genuinely warrants it. A boat or a hot tub also demands a base that stays level as Duval's sandy ground swells damp and pulls back dry, which puts drainage on equal footing with the steel. Give us the equipment and we size the pad to it.
Do I need a vapor barrier under the slab?
For an enclosed or heated slab, usually yes: with the river holding the water table near the surface, damp Northeast Florida ground keeps pushing moisture up into the concrete. Whether one goes in comes down to what the slab is built to do.
Does a concrete slab require a permit?
Some do, hinging on the size, the placement, and the use, and the requirements differ across Duval County and the neighboring jurisdictions. We call out when a permit looks likely so it can be handled at the start instead of surfacing midway through.