Concrete cost guide
Concrete Slab Cost in 2026
A concrete slab costs roughly $6 to $13 per square foot installed in 2026 for a plain, 4-inch residential slab. That puts a typical 20 by 20 foot (400 sq ft) slab around $2,600 to $5,200, and a small 10 by 10 foot pad closer to $700 to $1,300. The range is wide because the concrete itself is usually less than half the bill — base prep, reinforcement, finishing, and your local labor market often matter more than the mix.
This guide breaks down what you are actually paying for, which line items move the number most, and how to separate material cost from installed cost. When you want figures for your exact dimensions, the slab calculator converts length, width, and thickness into cubic yards and a material estimate in seconds.
Need project-specific numbers? Use the Concrete Slab Cost Calculator.
Last updated June 10, 2026
Typical Cost Ranges
| Item | Typical Cost | Notes |
|---|---|---|
| Plain 4 inch slab | $6-$13/sq ft | Patios, sheds, sidewalks |
| Garage slab | $7-$15/sq ft | Thicker edges, stronger mix, reinforcement |
| Stamped slab | $12-$25+/sq ft | Pattern, color, sealant, added labor |
| Bare concrete material only | $1.50-$2.50/sq ft | Ready-mix at 4 inches, no labor |
What Drives the Cost
- Square footage: Larger slabs cost more in total but often less per square foot, because fixed setup, mobilization, and crew-minimum charges spread across more area.
- Thickness and mix: Moving from 4 to 6 inches adds about 50% more concrete and usually a stronger PSI mix, raising both material and the prep around it.
- Base and excavation: Grading, a compacted gravel base, and hauling away soil or an old slab can add $1 to $4 per square foot before any concrete arrives.
- Reinforcement: Wire mesh, fiber, or rebar adds roughly $0.50 to $2.50 per square foot and is cheap insurance against cracking on anything load-bearing.
- Finish: A broom finish is the baseline. Smooth trowel adds a little; stamped, stained, or polished finishes can double the per-foot price.
- Region and access: Labor rates, ready-mix delivery distance, pump trucks for tight access, and contractor backlog can swing the same slab by thousands of dollars.
How To Estimate It
- Square feet = length x width
- Cubic yards = square feet x thickness in feet / 27
- Installed cost = square feet x local installed rate
What a slab quote usually includes
A standard flatwork quote typically covers forming the perimeter, fine grading, placing and finishing the concrete, cutting control joints, and basic cleanup. A broom finish and standard 3,000 PSI mix are normally baked in.
What is often quoted separately: excavation and hauling, removing an existing slab, importing and compacting gravel base, upgraded reinforcement, a vapor barrier, a higher-strength mix, decorative finishes, and sealing. Always ask which of these are in the number you were given, because that is where two quotes for the same slab diverge.
DIY bags vs ready-mix vs hiring a pro
For a small pad under about one cubic yard, bagged concrete you mix yourself is usually the cheapest route and avoids short-load delivery fees. Above one cubic yard, ready-mix is both cheaper per yard and far less work.
Hiring a finishing crew costs more, but concrete sets on a clock and a poor finish is permanent. For driveways, garage slabs, and anything visible, the labor premium usually buys flatness, proper jointing, and crack control that are hard to match as a first-timer.
How to lower slab cost without cutting corners
Keep the shape simple (rectangles form faster than curves), choose a broom finish over decorative, combine multiple small pours into one delivery to dodge short-load fees, and get at least three written quotes that itemize prep, reinforcement, and finish. Do not save money by skipping base compaction or reinforcement — those failures are the expensive ones.
FAQs
What is the cheapest concrete slab finish?
Plain broom or light trowel finish is usually the cheapest. Stamped, stained, polished, and exposed aggregate finishes add labor and materials.
Why do slab quotes vary so much?
Excavation, sub-base, access, reinforcement, finish, region, minimum crew charge, and contractor backlog can all move the quote, and not every quote includes the same scope.
How thick should a concrete slab be?
Four inches is standard for patios, sheds, and walkways. Use 5 to 6 inches for garage slabs, driveways, and anything carrying vehicles or heavy point loads.
Do I need rebar or wire mesh in a slab?
Most load-bearing slabs benefit from reinforcement. Wire mesh or fiber is common for patios and sheds, while rebar is typical for driveways and garage slabs. Local soil and code drive the final spec.
How long before you can use a new slab?
You can usually walk on a slab after 24 to 48 hours, but wait about 7 days for light use and roughly 28 days for full design strength before parking vehicles or applying heavy loads.