A concrete slab costs $4 to $8 per square foot in 2026 for a plain, broom-finished slab including materials and labor. A standard 10×10 ft patio slab runs $400 to $800. A 20×20 ft garage floor costs $1,600 to $3,200. Decorative finishes like stamped concrete add $4 to $10 per square foot on top of base costs.
Use our free Concrete Calculator to estimate material quantities and costs for your specific project dimensions.
Concrete Slab Cost by Project Type (2026)
Here is what you can expect to pay for the most common concrete slab projects in 2026, including materials and professional labor:
| Project | Size | Thickness | Low Estimate | High Estimate |
| Small patio | 8×8 ft | 4 in | $256 | $512 |
| Standard patio | 10×10 ft | 4 in | $400 | $800 |
| Large patio | 16×16 ft | 4 in | $1,024 | $2,048 |
| Sidewalk (40 ft) | 40×3 ft | 4 in | $480 | $960 |
| Driveway (1-car) | 12×20 ft | 5–6 in | $1,140 | $2,160 |
| Driveway (2-car) | 20×20 ft | 5–6 in | $1,900 | $3,600 |
| Garage floor (1-car) | 12×20 ft | 4 in | $960 | $1,920 |
| Garage floor (2-car) | 20×20 ft | 4 in | $1,600 | $3,200 |
| House foundation | 1,000 sq ft | 6 in | $7,500 | $15,000 |
Estimates include site prep, form work, concrete delivery, pour, and basic finishing. Does not include permits or decorative upgrades.
What Affects the Cost of a Concrete Slab?
Six main factors drive the final price of any concrete slab project:
1. Slab Size
The bigger the slab, the more concrete, labor, and form work required. Larger projects sometimes get a slight discount per square foot because setup costs are spread across more area.
2. Thickness
Standard residential slabs are 4 inches thick. Driveways need 5–6 inches to handle vehicle weight. Each extra inch adds roughly $0.50–$1.00 per square foot in material cost. See our full concrete slab thickness guide for recommendations by project type.
3. Site Preparation
Grading, excavation, and subbase gravel add $1–$3 per square foot. Poor soil conditions — soft, clay-heavy, or waterlogged ground — require extra preparation and cost more.
4. Reinforcement
Wire mesh adds $0.35–$0.50 per square foot. Rebar adds $0.50–$1.50 per square foot. Driveways, garage floors, and any slab carrying vehicle loads require reinforcement.
5. Concrete PSI and Mix Type
Standard 3,000 PSI concrete is the most affordable. Driveways need 4,000 PSI minimum. High-strength 5,000 PSI or fiber-reinforced mixes cost $5–$15 more per cubic yard.
6. Finish Type
Broom finish (plain) is cheapest. Stamped, stained, or polished concrete can double or triple the per-square-foot cost. See the finishes section below.
Concrete Thickness and PSI Guide
| Application | Recommended Thickness | Recommended PSI |
| Patio, walkway | 4 inches | 3,000 PSI |
| Residential driveway | 5–6 inches | 4,000 PSI |
| Garage floor | 4–6 inches | 4,000–4,500 PSI |
| Structural foundation | 6–8 inches | 4,000–5,000 PSI |
| Pool deck | 4 inches | 3,500 PSI |
To calculate exactly how many bags or cubic yards your slab needs at any thickness, use our Concrete Calculator.
Plain vs Decorative Concrete Finishes
| Finish Type | Cost per Sq Ft | Best For |
| Broom finish (plain) | $4–$8 | Driveways, walkways, patios |
| Exposed aggregate | $6–$10 | Driveways, pool decks |
| Stamped concrete | $10–$20 | Patios, decorative driveways |
| Stained concrete | $7–$15 | Interior floors, patios |
| Polished concrete | $3–$12 | Interior floors, garages |
Regional Cost Differences
Concrete prices vary significantly by location due to labor costs, material availability, and transport distance from batch plants. Here are typical ranges across major U.S. regions:
| Region | Cost per Sq Ft (Installed) |
| Northeast (NY, MA, CT) | $6–$10 |
| Southeast (FL, GA, SC) | $4–$7 |
| Midwest (IL, OH, MI) | $4–$8 |
| Southwest (TX, AZ, NM) | $4–$7 |
| West Coast (CA, OR, WA) | $6–$12 |
DIY vs Hiring a Contractor
For small projects like fence posts or a tiny patio, DIY with bags is perfectly reasonable. For anything over 1 cubic yard, hiring a concrete contractor is usually the better choice.
| DIY with Bags | Ready-Mix + Contractor | |
| Best for | Under 1 yard (small repairs, posts) | Patios, driveways, foundations |
| Material cost | $162–$240 per yard (bags) | $125–$165 per yard (ready-mix) |
| Labor | Your own time (physically demanding) | $3–$7 per sq ft |
| Quality | Variable — depends on mixing skill | Consistent, professional finish |
| Risk | Cracking, weak spots if mixed wrong | Low when using licensed contractor |
If you are planning a DIY project, start by calculating exactly how much concrete you need with our free Concrete Calculator. For a comparison of driveway materials, see our asphalt vs concrete driveway guide.
How to Save Money on a Concrete Slab
- Get three quotes. Concrete contractor pricing varies by 20–30% in most markets. Always get multiple bids before committing.
- Schedule in fall or winter. Concrete work is slower in colder months. Many contractors offer off-season discounts of 10–15%.
- Do your own site prep. Clearing the area, removing old concrete, and grading can be done yourself, saving $1–$3 per square foot in labor.
- Choose a simple finish. Broom finish costs half the price of stamped concrete and holds up just as well for driveways and walkways.
- Order the right amount. Underordering and needing a second delivery adds $50–$150 in fees. Use our Concrete Calculator to get the exact quantity right the first time.
Frequently Asked Questions
How much does a concrete slab cost per square foot?
A plain concrete slab costs $4 to $8 per square foot installed in 2026, including materials and labor. Decorative options like stamped or stained concrete cost $8 to $20 per square foot.
How much does a 10×10 concrete slab cost?
A 10×10 ft slab (100 sq ft) costs $400 to $800 for a plain broom finish. Stamped concrete for the same area runs $1,000 to $2,000.
How much does a 20×20 concrete slab cost for a garage?
A 20×20 ft garage slab costs $1,600 to $3,200 for a 4-inch plain slab. For a 6-inch slab to handle heavier vehicles, budget $2,400 to $4,800.
What factors affect concrete slab cost?
The main factors are slab size, thickness, site prep, reinforcement type, concrete PSI, finish type, and regional labor rates. The biggest variable is usually the finish — plain vs decorative.
Calculate Your Concrete Costs — Free
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