Concrete Foundations • Jacksonville FL

Concrete Foundations in Jacksonville, FL

Slab-on-grade, monolithic slab, and stem wall foundations to Florida Building Code. FL Certified Building Contractor CBC1269043 since 2013.

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Foundation type selection for NE Florida soil conditions

Jacksonville's sandy, high-water-table soil creates specific foundation design requirements. The most common residential foundation type in Duval County is the slab-on-grade, either monolithic (thickened edge) or with a grade beam. The sandy soil drains well but also settles unevenly under load, especially in low-lying areas near the St. Johns River and the Beaches.

We hold Florida Certified Building Contractor license CBC1269043, which qualifies us to pull foundation permits and act as prime contractor on residential foundations. Structural foundation work requires a CBC-licensed contractor. Specialty concrete contractors without CBC licensing cannot legally pull permits for this work.

Every foundation we pour begins with a soil assessment to verify sub-base bearing capacity. Clay-heavy soils common in Clay County require additional compaction and vapor barrier treatment. Sandy fill soil requires verification of proper compaction before forming. We document this for the building permit inspection.

Foundation services we provide in Jacksonville

Monolithic Slab-on-Grade

The most common Jacksonville residential foundation. Poured as a single unit with integrated footings at perimeter and load-bearing walls. Requires engineered plans for new construction.

Thickened Edge Slab

Standard slab with thickened perimeter designed to carry load-bearing wall weight. Used on sound bearing soil with minimal differential settlement risk.

Stem Wall Foundation

Concrete stem wall on spread footing with crawl space or slab fill. More expensive than monolithic but allows utilities and plumbing to remain accessible.

Slab Extensions & Additions

Extending existing slab foundations for home additions, garage conversions, and accessory structures. Proper doweling into existing slab required.

Detached Structure Foundations

Slab foundations for detached garages, workshops, carports, and storage buildings. Permit requirements apply to structures over 200 square feet.

Foundation Assessment

Visual review of existing foundations for clients buying or renovating older Jacksonville homes. We identify visible deficiencies and recommend appropriate remediation.

Get a Foundation Quote in Jacksonville

Written, fixed-price quote within 48 hours. No obligation.

✓ 13+ Years Experience ✓ Licensed CBC1269043 ✓ Written Fixed-Price Quote ✓ In-House Crew ✓ All of Duval County

Foundation questions for Jacksonville homeowners

Does my new construction foundation need an engineer?

Yes, for new residential construction in Duval County. Florida Building Code requires engineered foundation plans stamped by a Florida-licensed structural engineer for new habitable structures. We work with structural engineers and coordinate this as part of the project.

How much does a concrete slab foundation cost in Jacksonville FL?

Residential slab foundation installation runs $5 to $10 per square foot for a basic monolithic slab on prepared grade. A 1,200 square foot home foundation runs $6,000 to $12,000 for the concrete work itself, not including site prep, fill, or utilities. Call (904) 664-6905 for a written quote within 48 hours.

What causes foundation problems in Jacksonville FL?

The most common foundation issues are differential settlement caused by uneven soil compaction, poorly compacted fill over organic material, and soil erosion under the slab from water migration. Coastal and near-river areas also see issues from high water table conditions affecting the soil's bearing capacity.