How Much Does a Concrete Slab Cost?
$4 – $8 / sq ft
National average: $6 / sq ft installed
Interactive worksheet
Concrete slab cost calculator
Set the scope, size, and state — the tally updates as you go. Built from this guide's figures and BLS state wage data.
01 Quality & scope
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State figures apply BLS construction wages (2025) at a 60% labor weight — how we estimate.
Your estimate
- Labor ≈60%
- $1,800
- Materials & equipment
- $1,200
- Planning range
- $2,700 – $3,300
low $4.00/sq ft $8.00/sq ft high
U.S. construction trades average $65,360/yr (BLS 2025).
Get three written bids. One far under $2,400 usually means missing scope — ask what's not included. Far over $3,600, ask what's driving the number.
A concrete slab is the foundation for sheds, garages, patios, and additions — and the price comes down to size, thickness, and the prep underneath. A slab costs $4 to $8 per square foot installed in 2026, averaging around $6.
What you’re paying for
The concrete itself is only part of it. You’re also paying for forming, pouring, and finishing labor, plus the gravel base and grading that keep the slab from cracking. Reinforcement and removing an old slab add more.
Thickness depends on the load
A standard 4-inch slab handles patios and sheds. Garages, driveways, and anything bearing weight need 5–6 inches with rebar, which uses more material and costs more — but cracks far less.
The base matters most
A compacted gravel base, proper grading, and control joints are what separate a slab that lasts decades from one that cracks in a year. Don’t let a contractor skimp here.
How to save on a concrete slab
- Pour a standard size to use materials efficiently.
- Get the base and joints right rather than over-thickening everywhere.
- Combine pours (slab + walkway) in one visit to cut setup costs.
- Reinforce load-bearing slabs so you don’t pay twice for cracks.
| Component | Typical range | Notes |
|---|---|---|
| Concrete material | $1.50 – $3 / sq ft | — |
| Labor (form, pour, finish) | $1.50 – $3 / sq ft | — |
| Gravel base & grading | $0.50 – $1.50 / sq ft | — |
| Rebar / wire mesh | $0.30 – $1 / sq ft | — |
| Excavation / old slab removal | $1 – $3 / sq ft | — |
| Option | Typical range | Notes |
|---|---|---|
| Shed slab (10x12) | $500 – $1,000 | — |
| Patio slab (12x12) | $700 – $1,500 | — |
| 2-car garage (20x20) | $2,500 – $4,500 | — |
| Thicker / reinforced (per sq ft) | $7 – $12 / sq ft | — |
What affects the price
- Thickness A standard 4-inch slab is cheapest; 6-inch or thicker for heavy loads (garages, RVs) uses more concrete and rebar.
- Reinforcement Rebar or wire mesh adds cost but reduces cracking — worth it for slabs that bear weight.
- Site prep Grading, a compacted gravel base, and removing an old slab are a big part of the price and the slab's longevity.
- Size & access Bigger pours cost more total but less per square foot; tight access for the truck adds labor.
- Finish A basic broom finish is cheapest; stamped, stained, or polished finishes cost more.
Concrete slab cost by state
Where you live moves the price as much as any option you pick, because labor is a big share of the bill and construction wages differ sharply by state. Adjusted with BLS wage data (2025), a typical concrete slab job runs about $4.70 – $9.35/sq ft in Hawaii (+17%) versus $3.40 – $6.80/sq ft in Arkansas (−15%).
See the typical range in all 50 states + D.C.
| State | Typical range |
|---|---|
| Alabama | $3.50 – $6.95/sq ft |
| Alaska | $4.60 – $9.20/sq ft |
| Arizona | $3.80 – $7.60/sq ft |
| Arkansas | $3.40 – $6.80/sq ft |
| California | $4.50 – $8.95/sq ft |
| Colorado | $4 – $8/sq ft |
| Connecticut | $4.30 – $8.55/sq ft |
| Delaware | $3.90 – $7.85/sq ft |
| District of Columbia | $4.30 – $8.65/sq ft |
| Florida | $3.65 – $7.30/sq ft |
| Georgia | $3.70 – $7.35/sq ft |
| Hawaii | $4.70 – $9.35/sq ft |
| Idaho | $3.75 – $7.50/sq ft |
| Illinois | $4.60 – $9.20/sq ft |
| Indiana | $4.05 – $8.10/sq ft |
| Iowa | $3.90 – $7.75/sq ft |
| Kansas | $3.80 – $7.60/sq ft |
| Kentucky | $3.70 – $7.45/sq ft |
| Louisiana | $3.60 – $7.20/sq ft |
| Maine | $3.90 – $7.85/sq ft |
| Maryland | $4 – $8/sq ft |
| Massachusetts | $4.60 – $9.20/sq ft |
| Michigan | $4 – $8/sq ft |
| Minnesota | $4.35 – $8.70/sq ft |
| Mississippi | $3.50 – $6.95/sq ft |
| Missouri | $4.10 – $8.15/sq ft |
| Montana | $3.90 – $7.85/sq ft |
| Nebraska | $3.75 – $7.50/sq ft |
| Nevada | $4.10 – $8.25/sq ft |
| New Hampshire | $3.95 – $7.90/sq ft |
| New Jersey | $4.55 – $9.10/sq ft |
| New Mexico | $3.70 – $7.35/sq ft |
| New York | $4.40 – $8.80/sq ft |
| North Carolina | $3.60 – $7.20/sq ft |
| North Dakota | $4.05 – $8.10/sq ft |
| Ohio | $4 – $8/sq ft |
| Oklahoma | $3.65 – $7.30/sq ft |
| Oregon | $4.40 – $8.80/sq ft |
| Pennsylvania | $4.05 – $8.10/sq ft |
| Rhode Island | $4.15 – $8.30/sq ft |
| South Carolina | $3.65 – $7.30/sq ft |
| South Dakota | $3.60 – $7.20/sq ft |
| Tennessee | $3.70 – $7.35/sq ft |
| Texas | $3.65 – $7.30/sq ft |
| Utah | $3.75 – $7.50/sq ft |
| Vermont | $3.90 – $7.75/sq ft |
| Virginia | $3.80 – $7.60/sq ft |
| Washington | $4.65 – $9.30/sq ft |
| West Virginia | $3.80 – $7.60/sq ft |
| Wisconsin | $4.15 – $8.30/sq ft |
| Wyoming | $3.95 – $7.90/sq ft |
Estimates apply each state's BLS construction-wage multiplier to this guide's national range — a planning number, not a quote. Browse the full state cost guides or our methodology.
Frequently asked questions
- How much does a concrete slab cost per square foot?
- Most concrete slabs run $4–$8 per square foot installed, averaging about $6. Thicker, reinforced slabs for garages or heavy loads run $7–$12. Site prep and rebar drive most of the variation.
- How much is a concrete slab for a 2-car garage?
- A 20x20 (400 sq ft) garage slab typically costs $2,500–$4,500, since garages usually need a thicker, reinforced 6-inch slab to handle vehicle weight.
- How thick should a concrete slab be?
- Four inches is standard for patios and sheds. Garages, driveways, and anything bearing heavy loads should be 5–6 inches with rebar. Thicker slabs cost more but resist cracking under weight.
- Why do concrete slabs crack?
- Usually a poor base or no control joints. A compacted gravel base, proper thickness, rebar, and control joints cut every inch into manageable sections are what keep a slab from cracking.
- Can I pour a concrete slab myself?
- A small shed or patio slab is a doable DIY if you're comfortable with forms and finishing in a short working window. Larger slabs, anything load-bearing, or sloped sites are better left to pros.
How we estimate: ranges reflect typical U.S. pricing for materials and professional installation, compiled and cross-checked against the current (2026) industry sources listed below (see our data & methodology). Your actual cost depends on your location, project size, material grade, and local labor rates — always get multiple written quotes before you commit.
Sources
Cost ranges on this page were checked against current (2026) data from these industry sources:
- Concrete Slab Cost (2026) — HomeGuide
- How Much Does a Concrete Slab Cost? — Angi
- How Much Does a Concrete Slab Cost? — Bob Vila