Calculate cubic yards, bags needed, and Duval County-accurate ready-mix costs for driveways, patios, foundations, garage slabs & footings in Jacksonville, FL.
Enter dimensions for instant Jacksonville volume, bag count, and material cost.
Driveway: 4 in., 3,000 PSI. No air entrainment needed in Jacksonville's mild climate. Vapor barrier required over sandy FL soils. High water table — verify subgrade drainage. CILB-licensed contractor required. FBC compliant.
Driveway 4 in · Garage 4–5 in · Patio 4 in · Foundation 6 in · Footings 12+ in deep
Jacksonville spans over 874 square miles, making it the largest city by land area in the contiguous U.S. — a vast construction market with projects ranging from waterfront condos downtown to sprawling suburban residential developments in Mandarin, Southside, and the Beaches. Jacksonville's concrete environment is defined by its humid subtropical climate: hot summers (highs 90–95°F May–September), mild winters with virtually no freeze-thaw concern, and frequent summer thunderstorms and tropical weather requiring careful concrete curing planning. The Florida Building Code (FBC) governs all construction and mandates licensed contractors through the CILB.
Exterior flatwork: 3,000 PSI minimum — no air entrainment required (Jacksonville has no meaningful freeze-thaw cycles) · W/C ≤ 0.50 · Driveways: 4 in. minimum · Garage floors: 4 in., vapor barrier required · Foundations: 3,000–4,000 PSI, 6 in.; vapor barrier mandatory; geotech review for high-water-table and low-lying St. Johns River corridor sites · Footings: 12-inch minimum frost depth per Duval County / FBC — very shallow by U.S. standards · Hot weather: ACI 305 procedures required May–October for Jacksonville's heat and humidity — pre-wet subgrade, morning pours preferred, wet-cure immediately · All contractors must hold CILB registration — verify at myfloridalicense.com.
Standard 20×20 ft at 4 in. = ~5.5 cu yd of 3,000 PSI concrete. No air entrainment needed. Use limerock or crushed concrete base. Installed cost: $8–$13/sq ft in the Jacksonville market. Avoid afternoon pours in summer — high heat causes rapid moisture loss and plastic shrinkage cracking. Use curing compound or wet burlap immediately after finishing.
20×22 ft at 4–5 in. = ~5.4–6.7 cu yd. Vapor barrier mandatory over FL sandy soils. 3,000–4,000 PSI. Seal with acrylic or epoxy after 28-day cure. Jacksonville's humidity and ground moisture can cause significant vapor transmission through unsealed garage slabs. Installed cost: $9–$15/sq ft.
Jacksonville has a high water table in many areas — particularly Westside, the Beaches, Northside near the Nassau River, and any low-lying St. Johns River tributary neighborhoods. Foundation design in these areas must account for hydrostatic pressure and proper drainage. A geotechnical investigation is strongly recommended for any new foundation in flood zone or low-elevation areas.
Measure length and width in feet, thickness in inches. Jacksonville's sandy soils can be uneven after stripping — always order at least 10% extra. Short-load fees in the Duval County market run $150–$280/ticket.
Hot weather pours (ACI 305): Jacksonville's May–October heat and humidity cause rapid evaporation — always pour in early morning, pre-wet subgrade, use a retarder in the mix for large pours, and apply curing compound immediately after finishing. Never pour concrete when the evaporation rate exceeds 0.20 lb/ft²/hr. High water table: Sandy FL soils and a shallow water table in many Jacksonville neighborhoods can cause subgrade instability — always compact and test before placing concrete. Hurricane/wind loads: Duval County is in FBC Wind Zone II — rebar and anchor bolt placement must comply with Florida Building Code wind provisions. Sandy subgrade: Fine Florida sand can erode under slabs over time — use a properly compacted limerock or crushed concrete base, and consider a fiber mesh addition for crack resistance.
Current Duval County ready-mix pricing: $135–$165/yd. Installed costs exclude excavation, base, permits, and rebar.
| Project | Size | Thickness | Cu Yards | Material | Installed Est. | Notes |
|---|---|---|---|---|---|---|
| Driveway | 20×20 ft | 4 in. | ~5.5 yd | $814 | $1,800 – $3,000 | 3,000 PSI · No Air |
| Garage Floor | 20×22 ft | 4 in. | ~5.4 yd | $799 | $2,000 – $3,400 | 3,000 PSI + Vapor |
| Patio Slab | 16×20 ft | 4 in. | ~4.4 yd | $651 | $1,400 – $2,500 | 3,000 PSI · FBC |
| Foundation Slab | 1,500 sq ft | 6 in. | ~18.5 yd | $2,738 | $8,500 – $16,000 | Geotech · Water Table |
| Sidewalk | 4×40 ft | 4 in. | ~2.0 yd | $296 | $700 – $1,300 | 3,000 PSI · FBC |
| Pool Deck | 20×30 ft | 4 in. | ~8.1 yd | $1,199 | $3,200 – $6,500 | Broom / Exposed Agg. |
| Commercial | 40×60 ft | 6 in. | ~44.4 yd | $6,571 | $18,000 – $34,000 | 4,000–5,000 PSI · Eng. |
Verify permits, CILB licenses, and site conditions before any pour.
The City of Jacksonville Building Inspection Division manages permits and inspections for all residential and commercial concrete under the Florida Building Code. Required for foundations, retaining walls, structural slabs, and pool decks. Can advise on flood zone requirements for low-lying Duval County neighborhoods and wind zone provisions for concrete anchor bolts and rebar under FBC Wind Zone II.
Visit COJ.netThe Florida Construction Industry Licensing Board (CILB) maintains the state's contractor license database. Verify any Jacksonville concrete contractor's license status, insurance, and disciplinary history free at myfloridalicense.com. Always request current certificates of general liability ($1M+) and workers' comp insurance from the issuing insurer before signing any concrete contract in Jacksonville.
MyFloridaLicense.comFlorida law requires all excavators to call Sunshine 811 at least 2 business days before any digging or footing excavation. Jacksonville's utility infrastructure is extensive — gas lines, water mains, and fiber optic cables are present throughout Duval County. Call 811 or visit sunshine811.com. The service is free and legally required for every Jacksonville concrete project involving any ground disturbance — including fence post holes and deck footings.
Sunshine 811 FL