Ohio · Concrete slab guide
How to build a concrete slab in Ohio
Poured concrete pad with forms, gravel base, and rebar. A poured concrete pad is the base for sheds, hot tubs, and workshops. Small residential pads are usually permit-exempt.
Typical cost
$523–$831
Time
1–2 weekends
Skill
Intermediate
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Permits & code in Ohio
Slabs under 200 sq ft are typically permit-exempt. Larger pads or slabs supporting a structure trigger a permit.
State-level rules only — cities and HOAs frequently add stricter requirements. Always confirm with your local building department before you dig.
What most people get wrong
- Pouring straight onto uncompacted soil. Compact the base in 2" lifts or you'll crack.
- Skipping the vapor barrier — moisture wicks up and destroys anything you put on top.
- Screeding without a wet edge. Cold joints show as permanent lines.
The 5-step concrete slab plan
- Step 1Confirm site and permit pathLocate property lines, call 811 for utility marking, and check whether your city/HOA needs approval before you break ground.
- Step 2Order materialsUse the shopping list from our planner. Confirm delivery vs pickup — bulk lumber and concrete are usually cheaper delivered.
- Step 3Lay out and prep the siteBatter boards, string lines, level the base. Getting this right saves days later.
- Step 4Frame the structureFollow the cut list. Check for square with the 3-4-5 method every few pieces. Fasten with the right structural screws.
- Step 5Finish and inspectSand, stain/seal, and (if required) schedule your final inspection before backfilling or closing anything up.
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