Concrete
Concrete Slab Cost per Square Foot (2026)
A concrete slab costs $6-$12 per square foot installed in 2026. Cost breakdown by project type, what labor adds, thickness upcharges, and where DIY actually saves money.
Per-square-foot slab pricing hides a lot of moving parts. Two quotes for the same patio can differ by 60% and both be honest, because one includes excavation, base gravel, and a broom finish while the other assumes you hand over a prepared subgrade. This guide breaks the installed price into its parts so you can compare quotes on equal terms.
2026 installed cost by project
| Project | Typical size | Thickness | Installed cost |
|---|---|---|---|
| Shed pad | 8 × 12 ft | 4 in | $700-$1,300 |
| Small patio | 10 × 10 ft | 4 in | $800-$1,500 |
| Large patio | 15 × 20 ft | 4 in | $2,100-$3,600 |
| Single-car driveway | 12 × 20 ft | 5 in | $1,900-$3,400 |
| Two-car driveway | 20 × 24 ft | 5 in | $3,400-$6,700 |
| Garage slab | 24 × 24 ft | 5 in + edges | $4,600-$7,000 |
Ranges reflect national 2026 cost-guide data from sources like Angi and Concrete Network. Decorative finishes (stamping, staining, exposed aggregate) can push patios to $15+ per square foot.
Where the money goes
| Component | Cost per ft² | Notes |
|---|---|---|
| Concrete (4 in) | $1.85-$2.70 | At $150-$180/yd³ delivered |
| Gravel base (4 in) | $0.50-$1.00 | Material + compaction |
| Forms, stakes, vapor barrier | $0.30-$0.60 | Reusable forms lower repeat cost |
| Reinforcement (mesh or rebar) | $0.30-$1.00 | Rebar grid costs the most |
| Labor: form, pour, finish | $3.00-$5.00 | 40-50% of the installed price |
The multipliers to watch
Thickness. Every extra inch adds $0.50-$1.25 per square foot. Vehicles need 5-6 inches; do not pay for 6 under a shed, and do not accept 4 under a truck.
Thickened edges. Many slabs thicken to 8-12 inches at the perimeter. On a garage slab that can add half a yard of concrete; the slab calculation guide shows the math.
Site access. If the truck's chute cannot reach the forms, concrete moves by pump ($150-$300+ per pour) or wheelbarrow (more labor hours). Quotes rise accordingly.
Demolition. Removing an old slab first runs $2-$6 per square foot including disposal.
DIY math, honestly
On a 10 × 10 patio, hiring out costs roughly $800-$1,500 while DIY materials run $350-$550 plus tool rental. You save a few hundred dollars and take on the one task in home improvement with a hard countdown timer: once the truck pours, you have about 90 minutes of workable time. For a first pour, keep it under 2 yards, have three people, and read what goes under the slab first, because base failures, not finishing mistakes, kill most DIY slabs.
Size your own project in the concrete calculator, add local delivered pricing from the per-yard guide, and you can sanity-check any quote to within a few hundred dollars.
Sources & standards: quantities and factors in this guide follow the references documented in our methodology, including ACI 302/318 (concrete practice), OSHA 29 CFR 1926 Subpart P (excavation safety), ASTM aggregate designations, and the International Residential Code. Local codes, climate, and site conditions govern.
Frequently Asked Questions
How much does a concrete slab cost per square foot in 2026?
Most residential slabs cost $6 to $12 per square foot installed, with typical projects landing at $8-$10. Materials alone run $2-$4 per square foot; labor, forming, and finishing make up the rest.
How much does a 24x24 garage slab cost?
A 24 x 24 ft slab (576 sq ft) at 5 inches with thickened edges typically costs $4,600 to $7,000 installed. Concrete alone is roughly $1,700-$2,000 of that; the rest is labor, forms, base, and reinforcement.
How much does thickness change the price?
Each additional inch adds roughly $0.50 to $1.25 per square foot in material. Going from 4 to 6 inches on a 400 sq ft driveway adds about $300-$500.
Is it cheaper to pour a slab yourself?
DIY saves the $3-$5 per square foot labor component but you still pay for concrete, base, forms, and tool rental. On a small pad the savings are real; on anything over 3-4 yards, a mistimed DIY pour can cost more than the labor you saved.
What adds the most to slab quotes?
Site prep. Excavation, fill, grading, and access problems move quotes more than the concrete itself. A flat, accessible site with good soil pours for half the price per foot of a sloped backyard with wheelbarrow-only access.