Concrete Patios in Gretna, LA

What Does a Concrete Patio Cost in Gretna?

A 300 to 450 square foot patio in Gretna runs $4,200 to $8,550 at 2026 rates, based on $14 to $19 per square foot installed. Four variables move that number most.

• Existing subgrade condition. Lots where old fill meets native backswamp clay require proof-rolling and often 2 to 3 inches of additional base material, adding $300 to $700 to most jobs.
• Slab thickness. A standard 4-inch slab is the floor. Zones over loose fill or near pergola footings typically go to 5 inches, adding roughly $1.50 per square foot.
• Finish type. Broom finish is the baseline. A brushed or exposed aggregate finish adds $1 to $2 per square foot over broom.
• Sealer. A penetrating acrylic sealer applied within 28 days of the pour adds $0.50 to $0.90 per square foot and is worth it here, where moisture cycling is constant.

What Does Gretna's Ground Demand for a Concrete Patio?

Gretna sits on alluvial clay over former backswamp, with a water table that sits 2 to 4 feet below grade on most residential lots. The critical failure pattern is differential settlement where contractor-placed fill from a previous build meets undisturbed native clay. A patio slab bridges that transition zone, and if the base is not prepared correctly, one edge settles while the other holds.

The spec that addresses this directly is subgrade depth and compaction. 6 inches of crushed limestone compacted to 95 percent standard Proctor density is the baseline before any pour in Gretna. On lots with visible fill irregularity, that base goes to 8 inches. Compaction is verified with a plate compactor pass in two lifts, not one.

Slab reinforcement uses #3 rebar on 18-inch centers throughout. Expansion joints are tooled or saw-cut every 8 to 10 feet in both directions. A drainage slope of 1/8 inch per foot minimum, directed away from the house foundation, keeps surface water moving given the flat grade common across Gretna. Where a pergola or covered structure is planned, footings are sized and positioned before the slab is poured so the slab does not carry column loads it was not designed for.

How Does the Job Run in Gretna?

A 350 to 450 square foot patio in Gretna typically runs 3 to 4 working days. The sequence below reflects what the local ground adds.

1. Day 1. Excavate 10 to 12 inches below finished slab grade. Gretna clay excavates cleanly but holds water, so a pump and sump point are staged if the water table is close to dig depth.
2. Day 1 to 2. Place and compact crushed limestone base in two 3-inch lifts. Proof-roll before forms go in. Any soft spots get excavated and re-compacted before proceeding.
3. Day 2. Set forms, place 6-mil poly vapor barrier, tie rebar grid, position expansion joint material at perimeter and interior intervals.
4. Day 3. Pour 3,500 PSI concrete, screed, broom finish. Control joints tooled same day.
5. Day 4. Strip forms, cure compound applied. Foot traffic in 24 to 48 hours, furniture and light use at 7 days, full load at 28 days.

A Recent Concrete Patio Project in Gretna

Backyard patio, Gretna, Jefferson Parish, 390 sq ft.

The lot had been raised at the rear with uncompacted fill sometime in the 1990s, and that fill had consolidated unevenly, leaving a 1.5-inch low point near the center of the planned patio area. The crew excavated to 12 inches, removed the loose fill entirely, and rebuilt the base with 8 inches of crushed limestone compacted in two lifts before forms were set. Slab spec was 4 inches of 3,500 PSI with #3 rebar on 18-inch centers and a 6-mil poly barrier. Broom finish, penetrating sealer at 28 days. The job ran 4 days.

Questions Gretna Homeowners Ask About Concrete Patios

Do I need a permit for a concrete patio in Gretna?

Permit requirements in Gretna depend on the scope of work and any attached structures. A freestanding ground-level slab may fall below the permit threshold, but a patio with a pergola, roof or attached columns almost always requires one. Confirm the current thresholds directly with the Jefferson Parish Department of Inspection and Code Enforcement before work begins.

How long before I can put furniture on a new patio?

Light patio furniture is safe at 7 days. The slab reaches sufficient surface strength for foot traffic in 24 to 48 hours, but concrete does not reach full 28-day design strength until the end of the first month. Heavy planters or a pergola base should not be fully loaded until that 28-day mark.

Why does my neighbor's older concrete patio have cracks while the slab itself looks solid?

Cracking in Gretna patios almost always traces back to subgrade settlement, not the concrete mix. When alluvial clay or old fill consolidates unevenly under the slab, one section drops while the adjacent section holds, and the slab cracks at the stress point. A properly compacted 6-inch limestone base and a #3 rebar grid are what prevent that pattern, not a stronger concrete mix.

To get a specific price for your Gretna lot, contact New Orleans Concrete Contractors for a free on-site estimate. We review the subgrade condition before quoting so the number you receive reflects what your ground actually requires.