Common concrete installation projects
- Patios and walkways: usually 4 in thick on a compacted gravel base.
- Driveways: commonly 5–6 in, often reinforced, with thicker edges where trucks turn.
- Garage and shed slabs: may include a thickened edge acting as a footing where local code allows.
- Footings and steps: depth and size come from code and frost depth.
Thickness, reinforcement and strength
Concrete strength is specified in psi; residential flatwork often uses 3,000–4,000 psi mixes, with air entrainment in freeze–thaw climates like New York to resist scaling. Reinforcement — welded wire or rebar — helps hold cracks tight; it does not prevent cracking. Control joints sawn or tooled at regular intervals give the slab a planned place to crack.
Estimate a rebar grid with our rebar calculator.
How much concrete you need
Volume in cubic yards = length × width × thickness (in feet) ÷ 27. A 10 × 10 ft slab at 4 in is 1.23 yd³. Add 5–10% for waste and uneven base. Use the concrete calculator, the slab calculator for thickened edges, or the yard calculator to round to your supplier's increments.
Repair vs. replacement
Hairline cracks and surface scaling can often be sealed or resurfaced. Slabs with large settled sections, heaving or widespread structural cracking usually need removal and replacement — which adds demolition and haul-off cost.
Curing and cold-weather concrete installation
Concrete gains strength by curing, which needs moisture and moderate temperatures. In cold weather, fresh concrete must be protected from freezing — contractors use heated water, accelerators, blankets or enclosures. Avoid de-icing salts on new concrete during its first winter, and follow your contractor's curing instructions.
Concrete Driveways, Slabs & Patios costs in 2026
Component pricing from a 2023-dated guide; confirm current local prices.
| Item | Typical range |
|---|---|
| Ready-mix (4,000 psi) | average $137/yd³; typical $125–$165 |
| Slab materials | $2–$5 per sq ft |
| Slab labor (pouring & finishing) | $2–$5 per sq ft |
| Example: 30 × 30 ft slab | $3,600–$7,200 |
Typical national ranges. New York City and other high-cost metros often run above them — get several written bids for your project.
Calculators for this project
New York rules and permits
NYC sidewalks. In New York City the adjacent property owner must install, repair and maintain the sidewalk. A DOT Notice of Sidewalk Violation carries no fine but is recorded with the County Clerk; owners have 75 days to repair before DOT may do the work and bill them, with a lien possible after 90 days unpaid. A DOT sidewalk permit costs $70 per 300 linear feet. The City does not charge 1-, 2- and 3-family homeowners for damage caused solely by City trees. See our sidewalk violation guide.
Curb cuts and driveways in NYC require DOT and DOB approvals — confirm before you plan a new driveway.
Frequently asked questions
How much does a concrete slab cost?
National pricing puts materials around $2–$5 and labor around $2–$5 per sq ft; its 30 × 30 ft example totals $3,600–$7,200. Try the concrete cost calculator.
How thick should a concrete driveway be?
Commonly 5–6 in for cars, more for heavy vehicles or poor soil. Follow local standards.
Why does new concrete crack after installation?
Concrete shrinks as it cures. Control joints, a well-compacted base, the right water content and proper curing keep cracks where they belong.
How long before I can drive on new concrete?
Contractors commonly advise waiting at least about a week for cars and longer for heavy vehicles; follow your contractor's guidance for your mix and weather.
