Concrete flatwork typically costs $6-$12 per square foot installed, with an average near $9 for a standard broom-finished slab. Driveway thickness, site preparation, reinforcement, finish, access, and local labor rates can push complex work above $15 per square foot.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed flatwork | $6/sq ft | $9/sq ft | $15+/sq ft | Standard slab through complex or premium work |
| 400-sq-ft project | $2,400 | $3,600 | $6,000+ | Before unusual removal or access charges |
| Concrete material | $130/cu yd | $165/cu yd | $220/cu yd | Price varies by mix and delivery market |
| Labor | $3/sq ft | $5/sq ft | $8+/sq ft | Placement, finishing, and crew costs |
What a standard patio or driveway slab usually costs
For a basic patio, walkway, or shed pad, installed flatwork often falls around $6-$10 per square foot. A residential driveway commonly runs $8-$14 per square foot because it usually needs a thicker slab and stronger base preparation. Decorative color, exposed aggregate, or a complex layout can raise pricing to $12-$20 per square foot.
A 400-square-foot standard patio is often $2,400-$4,000, while the same area built as a driveway may cost $3,200-$5,600. These estimates assume ordinary access, a stable site, a standard ready-mix order, and a broom finish. Assumptions: typical U.S. suburban labor rates, standard concrete, and no major drainage or demolition work.
How concrete, labor, and base prep appear in quotes
Contractor bids may group tasks differently, so comparing the scope matters as much as comparing the total. The table shows common allowances for a 400-square-foot project; actual line items depend on thickness, crew minimums, and local material costs.
| Cost component | Typical allowance | What it covers |
|---|---|---|
| Concrete and delivery | $900-$1,600 | Ready-mix for a 4- to 5-inch slab, including typical short-load effects |
| Labor and finishing | $1,200-$2,400 | Forms, placement, leveling, jointing, and surface finish |
| Base and reinforcement | $400-$1,000 | Aggregate base, compaction, mesh or rebar where specified |
| Equipment and access | $150-$700 | Small tools, pump or buggy, and difficult delivery access |
| Removal and disposal | $0-$1,600 | Existing slab breakup, hauling, and disposal if required |
Base preparation and demolition can shift a quote by hundreds or thousands of dollars. Ask whether the bid includes excavation, haul-away, compaction, reinforcement, control joints, cleanup, and any concrete pumping charge.
Slab thickness, reinforcement, and access change the estimate
Thickness is a major price driver because it determines concrete volume and can affect forming and placement. A 4-inch slab uses about 0.049 cubic yards of concrete per square foot; a 6-inch slab uses about 0.074 cubic yards, roughly 50% more before waste. Driveways for heavier vehicles may require thicker concrete or engineered reinforcement rather than a basic patio specification.
Small jobs and difficult sites often have higher per-square-foot rates than larger, open projects. Under 200 square feet, a crew minimum may put the effective rate 15%-35% above a larger job. A narrow side yard, steep slope, or delivery route more than 100 feet from the truck may require a pump or buggy, adding roughly $300-$1,000. Decorative finishes commonly add $2-$8 per square foot.
Regional flatwork rates vary with labor and concrete delivery
Prices in high-cost coastal metros and dense cities can run about 15%-30% above a national-style estimate because of labor, permitting, access, and disposal rates. Many Midwest and Southern suburban markets fall near the middle of the ranges, while rural areas may be 5%-15% lower for labor but face higher delivery charges when ready-mix plants are far away.
Local concrete availability and job access can outweigh broad regional averages. A remote site may incur a short-load fee, while an urban project may require a pump, parking coordination, or hand-carry work. Obtain quotes from contractors working in the same local market and compare the specified thickness and finish.
How many crew hours does a 400-square-foot pour take?
A straightforward 400-square-foot slab may take a four-person crew about 8-12 hours for layout, forming, placing, and finishing, often split between preparation and pour day. Excavation, removal, or complex forms can add a day or more. Concrete typically needs several days before normal foot traffic and longer before vehicles; curing and weather conditions affect the schedule.
Labor budgets commonly work out to about $3-$8 per square foot for flatwork installation. A rough labor check is ; for example, 32-48 crew-hours at a blended $45-$75 per hour equals about $1,440-$3,600 before equipment, overhead, and materials. Contractor bids usually package these costs rather than bill each worker hour directly.
Three 400-square-foot quotes show the finish and site effect
These examples illustrate how the same area can produce different totals. They assume local rates near the national middle and exclude unusual engineering or permit requirements.
| Project scenario | Estimated total | Approx. rate | Included scope |
|---|---|---|---|
| Basic patio | $2,800-$3,600 | $7-$9/sq ft | 4-inch slab, broom finish, prepared level base |
| Driveway replacement | $4,400-$6,000 | $11-$15/sq ft | Removal, disposal, thicker slab, reinforcement allowance |
| Decorative patio with limited access | $6,000-$8,000 | $15-$20/sq ft | Color or exposed finish, added handling, detailed forms |
Confirm the square footage, thickness, reinforcement, and removal scope before treating two totals as comparable. A low bid may exclude disposal or specify a thinner slab, while a higher bid may include a pump, upgraded finish, or more extensive base work.
Repairing cracked flatwork can cost less than replacing it
Small crack sealing or patching may cost about $150-$500, while leveling a sunken section often runs $5-$15 per square foot depending on access and method. Full replacement commonly makes sense when large areas are broken, badly settled, or draining toward the building. Replacing a 400-square-foot slab may cost $2,400-$6,000 or more, plus removal if it is not included.
Repair is usually less expensive for isolated damage, but it will not correct widespread base failure. Ask whether the proposed repair addresses the cause of movement and whether color or texture will differ from the existing concrete.
Control demolition and finish choices to lower the flatwork bill
Keeping a sound base, simplifying the slab shape, and choosing a broom finish can reduce excavation, form labor, and finishing time. If the old slab must come out, ask whether the contractor can price demolition separately and whether a clean, accessible staging area reduces hauling or equipment time. Combining nearby small pours may also reduce mobilization and short-load charges.
Compare at least three written bids with matching dimensions and specifications. Confirm thickness, mix, reinforcement, base depth, drainage slope, joints, disposal, and cleanup; then compare any upgrades separately. Avoid choosing a thinner slab solely to lower the price if the intended vehicle load or local conditions call for stronger construction.