Concrete Pad Cost Calculator
Get an instant free estimate for installing concrete pads for equipment, sheds, and spas.
How is Concrete Pad Cost Calculated?
Unlike large driveways, concrete pads are priced based on Project Minimums and Usage Requirements. While the material cost is low, the labor to frame, grade, and pour a small area dictates the price. Heavy-duty use (Hot Tubs) triggers thicker pours and reinforcement costs.
Calculate Your Estimate
Project Location
Choose which state the project is located.
Pad Usage
What will this concrete pad be used for? This helps determine thickness requirements.
Dimensions
Enter the length and width of the pad.
Additional Services:
Key Factors Influencing Pad Rates
Equipment Type
AC / Generator: Requires vibration control and specific sizing.
Hot Tub: Requires high load-bearing capacity (reinforced 6" slab).
Shed: Requires level perimeter and often anchors.
Access & Prep
Backyard access is crucial. If a truck cannot reach the spot, concrete must be wheelbarrowed or pumped, adding labor or pump fees ($400+).
Average Cost by Use Case
| Pad Type | Typical Size | Estimated Cost |
|---|---|---|
| AC / Trash Pad | 3' x 3' to 4' x 8' | $600 – $900 |
| Generator Pad | 3' x 5' to 4' x 6' | $800 – $1,200 |
| Hot Tub Pad (6") | 8' x 8' to 10' x 10' | $1,500 – $2,500 |
| Shed Foundation | 10' x 12' | $1,200 – $2,000 |
Additional Service Fees
| Service | Estimated Cost | Note |
|---|---|---|
| Wheelbarrowing | $100 – $300 | If truck has no direct access |
| Gravel Base | $2 – $3 / sq ft | Compacted stone for drainage |
| Debris Disposal | $150 | Hauling away soil/sod |
| Anchor Bolts | $10 – $20 each | Installing shed/structure anchors |
How to Estimate Concrete Pad Cost Manually
Concrete pads are small slabs designed for specific equipment. Because they are small, minimum labor and truck fees often drive the price more than material volume.
Step 1: Size the Pad
Rule of thumb: The pad should be 12 inches wider and longer than the equipment sitting on it. For an 8'x8' hot tub, pour a 9'x9' pad.
Step 2: Check Thickness
Standard (4"): Trash cans, AC units, small sheds.
Heavy Duty (6"): Hot tubs, large generators, pool equipment.
Step 3: Account for Minimums
Concrete trucks charge for "short loads" (under 4-6 yards). Expect a minimum project fee of $600 - $1,000 for professional installation, regardless of how small the pad is.
Step 4: Use the Formula
(Sq_Ft × $12) + Short_Load_Fee ($200) + Labor_Minimum = Total
Example: For a 10' x 10' Hot Tub Pad (100 sq ft):
(100 sq ft × $12) + $200 (Short Load) + $500 (Labor Min) = $1,900 Total
Frequently Asked Questions
How thick should a concrete pad be for a hot tub?
A hot tub pad should be at least 4 inches thick, but 6 inches is recommended for larger tubs (6+ person) to support the immense weight of water (approx. 8.3 lbs per gallon) without cracking.
Do I need a permit for a small concrete pad?
Usually, no. Permits are typically required for larger slabs (over 100-200 sq ft) or driveways crossing sidewalks. However, check local zoning for setback requirements from property lines.
Can I pour a concrete pad directly on dirt?
No. You must remove the topsoil and organic matter, then install a compacted gravel base (3-4 inches). Pouring on dirt leads to settling, shifting, and cracking.
How long until I can put my equipment on the pad?
Wait at least 7 days for the concrete to cure to about 70% strength. For very heavy items like a hot tub full of water, waiting 28 days for full cure is safest.
What is the cost difference between a shed pad and a gravel pad?
A concrete shed pad is permanent and costs $8-$15 per sq ft ($800 minimum). A gravel pad (timber box with crushed stone) is cheaper ($4-$6 per sq ft) and drains better, but is less stable.
Should I use rebar in a generator pad?
Yes. Generators vibrate heavily when running. Rebar or heavy gauge wire mesh helps hold the concrete together and prevents vibration cracks over time.
How much does a trash can pad cost?
A small 4x8 pad for trash bins typically falls under a contractor's minimum charge, often costing between $600 and $900. It is often cost-effective to combine this with other concrete work.
Can I use bags of concrete (Quikrete) for a pad?
For very small pads (like 3x3 AC pads), yes. You can mix bags on-site. For anything larger than 8x8, ordering ready-mix via a truck is cleaner, stronger, and more consistent.
What is 'broom finish'?
A broom finish creates a rough, non-slip texture by dragging a broom across wet concrete. It is the standard finish for outdoor pads to prevent slipping when wet.
Do I need anchors installed?
For sheds and some generators, yes. Wind codes may require the structure to be bolted to the concrete. Ask your installer to place J-bolts into the wet concrete at specific locations.