Concrete Patios in Chalmette, LA

What Concrete Patios Cost in Chalmette

Concrete patio installation in Chalmette runs $9 to $15 per square foot in 2026. A 400 square foot patio lands at $3,600 to $6,000. A 600 square foot patio runs $5,400 to $9,000. Four variables move the number most in this area.

• Subgrade depth: organic material close to the surface means more excavation and more base material.
• Dewatering: a water table sitting 2 to 5 feet below grade can require pump time before forming.
• Reinforcement: heavier rebar schedules add material and labour cost over what a stable-soil job needs.
• Finish: a standard broom finish adds nothing over base price; exposed aggregate or a stamped surface adds $3 to $6 per square foot.

Confirm any permit requirements with the St. Bernard Parish Department of Community Development before work begins. Thresholds and fees are set by the parish and change periodically.

What Chalmette Ground Demands for a Concrete Patio

Chalmette sits on soft alluvial clay and organic silt with a water table between 2 and 5 feet below grade. As the organics underneath compress over years, slabs settle unevenly. A patio that fails here almost always traces back to inadequate subgrade preparation, not the concrete itself.

What subgrade preparation looks like on this soil

Excavation goes down 10 to 12 inches below finish grade to remove soft organic material. The void is filled with 6 inches of compacted limestone or crushed stone, placed in two 3-inch lifts and compacted to 95 percent of maximum dry density before any concrete is placed. A 6-mil polyethylene vapour barrier goes over the base to slow capillary moisture from below.

Slab thickness, reinforcement, and joints

The slab is 5 inches thick rather than the standard 4 inches. #4 rebar on 16-inch centres, placed at mid-depth, carries the load across any soft spots that develop below. Expansion joints are cut or tooled every 8 to 10 feet in both directions within 12 hours of the pour. A 1/8-inch-per-foot drainage slope away from the house foundation prevents water from ponding on the surface and working back under the slab edge.

Sealer and pergola footings

A penetrating silane-siloxane sealer applied 28 days after the pour reduces moisture infiltration at the surface. If the patio includes pergola footings, those are drilled to a minimum of 36 inches below grade and belled out at the bottom to bear on firmer material below the organic layer.

How the Job Runs in Chalmette

A 400 to 600 square foot patio in Chalmette typically runs 4 to 5 working days. Day one is excavation and dewatering if the base is wet. Days two and three are base placement, compaction in lifts, vapour barrier, and forming. Day four is the pour, finishing, and joint work. Day five is stripping forms and initial cleanup. Foot traffic is safe at 24 to 48 hours. Vehicle or heavy furniture loads wait 7 days. The slab reaches full design strength at 28 days.

A Recent Patio Project in Chalmette

Backyard patio replacement, Chalmette, 480 sq ft. The original slab had settled 3 inches at the far corner over roughly 15 years, creating a low point that held standing water after rain. Excavation revealed organic fill to a depth of 9 inches with no compacted base underneath. The crew removed all material to 12 inches, placed and compacted 6 inches of limestone in two lifts, laid 6-mil poly, and poured 5 inches of 3,500 PSI concrete with #4 rebar on 16-inch centres. Broom finish, expansion joints every 8 feet, drainage slope of 1/8 inch per foot to the yard. Four working days start to finish.

Questions Chalmette Homeowners Ask About Concrete Patios

Will my patio settle like my old one did?

Proper subgrade preparation is what separates a stable slab from one that settles. Removing organic material to 10 to 12 inches, replacing it with compacted limestone, and reinforcing the slab with #4 rebar addresses the failure mode directly. No slab on this soil carries a lifetime guarantee, but correct preparation extends service life from 10 to 15 years to 30 years or more.

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

Permit requirements depend on the size and location of the patio relative to your property lines and any existing structures. Contact the St. Bernard Parish Department of Community Development directly to confirm what your specific project requires before scheduling work.

Can I add a pergola or covered structure to the patio later?

A pergola can be added after the patio is poured if footings are planned from the start. Retrofit footings drilled through an existing slab are possible but cost more and create disruption. Identify any planned overhead structure before the pour so footings are cast in the correct locations at full depth, a minimum of 36 inches on this soil.

Call or submit the contact form to schedule a free on-site estimate in Chalmette. A crew member will walk the site, assess the subgrade, and give a written scope and price before any commitment is made.