Concrete Slab Cost in 2026
A concrete slab in Greater New Orleans costs $6 to $14 per square foot in 2026, with most residential pours landing between $8 and $12 per square foot once subgrade work, reinforcement, and finishing are included. The final number depends on slab thickness, ground conditions, access, and the finish specified. The table below breaks the range by common job sizes.
Key facts
- Standard 4-inch slab costs $6 to $14 per square foot in the Greater New Orleans area in 2026
- A 600 sq ft driveway slab runs $4,800 to $8,400 before demolition or finish upgrades
- Subgrade prep adds $1.50 to $3.00 per square foot on soft alluvial clay common south of Lake Pontchartrain
- Reinforcement with #3 rebar on 18-inch centers adds $0.75 to $1.50 per square foot over fiber mesh alone
- Removing an existing slab before the new pour adds $2 to $6 per square foot depending on thickness and rebar
| Job size | Typical range (2026) | Per square foot |
|---|---|---|
| Small pad (100 sq ft) | $900 to $1,400 | $9 to $14 |
| Patio slab (200 sq ft) | $1,600 to $2,600 | $8 to $13 |
| Garage slab (400 sq ft) | $3,200 to $5,200 | $8 to $13 |
| Driveway slab (600 sq ft) | $4,800 to $8,400 | $8 to $14 |
| Large driveway or shop pad (800 sq ft) | $5,600 to $9,600 | $7 to $12 |
| Commercial pad (1,200 sq ft) | $7,200 to $13,200 | $6 to $11 |
| Warehouse or parking area (2,000+ sq ft) | $12,000 to $22,000 | $6 to $11 |
Smaller pours carry a higher per-square-foot cost because mobilization, formwork setup, and concrete truck minimums spread across fewer square feet. A pour under 200 square feet rarely drops below $9 per square foot regardless of how simple the slab is.
What Determines the Price of a Concrete Slab?
Five factors move a concrete slab price more than any others: slab thickness, subgrade condition, demolition of an existing slab, reinforcement method, and surface finish. Each factor carries a measurable dollar impact.
How Does Slab Thickness Affect Cost?
A standard residential slab is 4 inches thick using 3,500 PSI concrete. Increasing slab thickness to 6 inches for a garage or heavy-equipment pad adds $1.50 to $3.00 per square foot in additional concrete volume alone. A 400 sq ft garage slab at 6 inches uses roughly 3.7 cubic yards compared to 2.5 cubic yards at 4 inches, and concrete in the New Orleans metro runs $160 to $195 per cubic yard delivered in 2026.
How Much Does Subgrade Preparation Add?
Subgrade preparation adds $1.50 to $3.00 per square foot on the soft alluvial clay and organic silt common across Jefferson and Orleans parishes. Stable ground on the north shore near Mandeville or Covington sometimes requires only 4 inches of compacted limestone base. South shore sites often need 6 to 8 inches of imported limestone over geotextile fabric to bridge weak soils, adding both material and labor cost.
What Does Demolition of an Existing Slab Cost?
Removing an existing slab adds $2 to $6 per square foot. A plain 4-inch unreinforced slab breaks out and hauls off at the lower end. A 6-inch slab with rebar, or a slab poured over old footings, pushes toward $5 to $6 per square foot because the breakout is slower and the debris is heavier. Disposal runs $45 to $65 per ton at Greater New Orleans area facilities.
How Does Reinforcement Change the Price?
Fiber mesh reinforcement is the baseline, adding $0.25 to $0.50 per square foot. Upgrading to #3 rebar on 18-inch centers adds $0.75 to $1.50 per square foot above fiber mesh. Rebar is standard for any slab that carries vehicle traffic or sits on expansive clay, because rebar holds the slab together as the subgrade shifts seasonally.
What Premium Does a Decorative Finish Add?
A broom finish is included in base pricing. Exposed aggregate adds $2 to $4 per square foot. Stamped concrete adds $4 to $8 per square foot depending on pattern complexity and coloring method. A simple salt finish or light brooming variation adds nothing beyond base cost.
What Does a Concrete Slab Cost by Size?
A 10x10 pad (100 sq ft) costs $900 to $1,400, while a 20x30 driveway (600 sq ft) costs $4,800 to $8,400 in the Greater New Orleans market. The table above covers the common ranges. Below is the arithmetic for three sizes people search most often.
A 12x12 patio slab at 144 square feet, 4 inches thick, broom finished, on stable ground runs roughly 144 sq ft multiplied by $9 to $12 per square foot, producing a range of $1,296 to $1,728.
A 20x20 garage slab at 400 square feet, 4 inches thick with #3 rebar, on clay requiring 6 inches of compacted base, runs 400 sq ft multiplied by $10 to $13 per square foot, producing a range of $4,000 to $5,200.
A 20x30 driveway slab at 600 square feet, 4 inches thick with rebar and control joints every 10 feet, broom finished, runs 600 sq ft multiplied by $8 to $14 per square foot, producing a range of $4,800 to $8,400. Demolition of an existing driveway adds $1,200 to $3,600 to that range.
How Does Concrete Slab Cost Change by Type or Finish?
Slab cost varies from $6 per square foot for a plain utility pad to $22 per square foot for a stamped and colored patio slab with an upgraded base. The difference is labor intensity and material specification.
- Plain broom-finish slab, 4 inches, fiber mesh: $6 to $10 per square foot
- Reinforced slab with #3 rebar and compacted limestone base: $8 to $13 per square foot
- Exposed aggregate finish on reinforced slab: $10 to $16 per square foot
- Stamped and integrally colored slab: $14 to $22 per square foot
- Thickened-edge monolithic slab for a detached garage or shop: $10 to $15 per square foot
Stamped concrete pricing includes the cost of release agent, color hardener or integral color, and the stamping mats themselves. A single ashlar slate pattern at one color runs $14 to $17 per square foot. A multi-color pattern with hand-stained borders runs $18 to $22 per square foot.
What Is Included in a Contractor's Concrete Slab Price?
A complete contractor price for a concrete slab includes layout, formwork, subgrade preparation, base material, concrete delivery, placement, finishing, control-joint cutting, and basic curing. Each of these items carries real cost that a per-square-foot quote covers.
Three items typically included in a standard slab quote:
- Excavation to grade, compaction, and 4 to 6 inches of limestone base
- Formwork, 3,500 PSI concrete placement, finishing, and control joints cut within 12 hours
- Basic fiber mesh or welded wire reinforcement
Four items typically excluded from a standard slab quote:
- Demolition and disposal of an existing slab ($2 to $6 per square foot)
- Permits, which in Jefferson Parish run $75 to $200 depending on slab size and zoning, though homeowners verify current fees with the Jefferson Parish Department of Inspection and Code Enforcement directly
- Rebar upgrade beyond fiber mesh ($0.75 to $1.50 per square foot additional)
- Sealer application after curing ($0.50 to $1.50 per square foot, applied after the 28-day full cure period)
How Do You Tell If a Concrete Slab Quote Is Fair?
A fair quote for a 4-inch residential slab in Greater New Orleans falls between $8 and $13 per square foot in 2026, with the line items broken out so the homeowner can see what each component costs. A single lump number with no breakdown is not necessarily dishonest, but a detailed quote is easier to compare.
A suspiciously low bid, below $6 per square foot for a residential pour, usually means one of four things: a 3-inch slab instead of 4 inches, no compacted base layer, fiber mesh only with no option for rebar, or no control-joint cutting. Each of those shortcuts reduces the slab's service life on south Louisiana clay from 25 to 30 years down to 8 to 12 years before cracking and settlement become visible.
Three checkable items in any slab quote:
- Slab thickness stated in inches, not described as "standard"
- Base material type and depth stated in inches
- Reinforcement method named: fiber mesh, welded wire, or rebar with spacing specified
A site visit is what produces an actual number. No contractor can quote a slab accurately from a phone call alone, because ground conditions, access for the concrete truck, and existing-slab removal change the price by 30% to 50%.
Where Do New Orleans Concrete Slab Prices Sit Against the National Range?
Greater New Orleans concrete slab prices run 10% to 20% above the national average of $5 to $10 per square foot. The local range of $6 to $14 per square foot reflects three conditions specific to this market.
First, the alluvial clay and high water table across Orleans, Jefferson, and St. Bernard parishes demand more subgrade preparation than stable-soil markets. A slab in Metairie or Kenner typically requires 6 inches of imported limestone over geotextile fabric, while a comparable slab in a stable-soil city pours directly over compacted native ground with 4 inches of base.
Second, concrete delivery prices in the Greater New Orleans metro run $160 to $195 per cubic yard, compared to $130 to $170 in many inland markets, reflecting longer haul distances from batch plants and fuel surcharges.
Third, labor rates for experienced finishers in the New Orleans market run $22 to $30 per hour in 2026, driven by steady demand from both residential and commercial reconstruction work across the metro area. A 600 sq ft driveway pour requires a 4-person crew working 6 to 8 hours for placement and finishing alone.
Common questions
- How much does a 20x20 concrete slab cost in 2026?
- A 20x20 concrete slab (400 sq ft) costs $3,200 to $5,200 in the Greater New Orleans area in 2026. The price depends on slab thickness, subgrade preparation, and reinforcement method. A 4-inch slab with rebar on compacted limestone base falls in the $10 to $13 per square foot range.
- How thick does a concrete slab need to be for a driveway?
- A residential driveway slab is 4 inches of 3,500 PSI concrete over 4 to 6 inches of compacted limestone base. Driveways handling heavier vehicles like RVs or work trucks use a 5 or 6 inch slab thickness. Thicker slabs add $1.50 to $3.00 per square foot in concrete material cost.
- Does a concrete slab need rebar or is wire mesh enough?
- A concrete slab on stable ground performs adequately with welded wire mesh or fiber mesh reinforcement. A slab on expansive clay, like the alluvial soils across south Louisiana, benefits from #3 rebar on 18-inch centers. Rebar adds $0.75 to $1.50 per square foot above fiber mesh but holds the slab together during seasonal soil movement.
- How long does a concrete slab take to cure before you can drive on it?
- A concrete slab supports foot traffic after 24 to 48 hours. Vehicle traffic is safe after 7 days. Full cure takes 28 days at normal temperatures. Parking a heavy vehicle on a slab before 7 days risks surface cracking and joint damage, especially on 4-inch residential slabs.
- Why are concrete prices higher in New Orleans than the national average?
- Greater New Orleans concrete slab prices run 10% to 20% above the national average because of three factors: soft alluvial clay requiring 6 to 8 inches of imported base material, concrete delivery at $160 to $195 per cubic yard compared to $130 to $170 nationally, and finisher labor rates of $22 to $30 per hour in the local market.
Last updated August 5, 2026
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