Concrete Slab Cost for a 20×20 Patio: Complete 2026 Pricing Guide
How much does a 20x20 concrete patio cost in 2026? Breakdown by finish type, thickness, reinforcement, site prep, and regional pricing with DIY vs. pro comparison.
How Much Does a 20×20 Concrete Patio Cost?
A 20×20-foot concrete patio (400 sq ft) costs between $2,400 and $8,000 installed in 2026, with the national average around $4,800 for a standard 4-inch-thick slab with a broom finish. The cost per square foot typically ranges from $6 to $20 depending on the finish and complexity.
Cost by Finish Type (400 sq ft)
| Finish Type | Cost per Sq Ft | Total Installed Cost | Best For |
|---|---|---|---|
| Basic Broom Finish | $6 – $10 | $2,400 – $4,000 | Budget projects, utility areas |
| Stamped Concrete | $12 – $20 | $4,800 – $8,000 | Patios, pool decks, curb appeal |
| Stained Concrete | $10 – $16 | $4,000 – $6,400 | Adding color, modern look |
| Exposed Aggregate | $10 – $16 | $4,000 – $6,400 | Slip resistance, decorative |
| Polished Concrete | $12 – $22 | $4,800 – $8,800 | Modern, high-end homes |
| Stamped + Stained Combo | $15 – $25 | $6,000 – $10,000 | Premium aesthetic |
Stamped concrete that mimics stone or brick is the most popular patio choice — it costs about half of real stone pavers but delivers a similar high-end look.
Full Cost Breakdown
| Line Item | Basic Broom | Stamped Concrete |
|---|---|---|
| Concrete (10–11 yards @ $150/yd delivered) | $1,500 – $1,800 | $1,500 – $1,800 |
| Site prep (excavation, grading, gravel base) | $500 – $1,200 | $600 – $1,500 |
| Forms and rebar/wire mesh | $200 – $500 | $300 – $600 |
| Pouring, screeding, finishing | $600 – $1,200 | $1,200 – $2,500 |
| Stamp mats / color release / staining | N/A | $800 – $1,500 |
| Sealing (after curing) | $200 – $400 | $300 – $600 |
| Permit | $100 – $300 | $100 – $300 |
| Total | $3,100 – $5,400 | $4,800 – $8,800 |
Use our Concrete Cost Calculator to customize your estimate by dimensions, thickness, finish, and reinforcement assumptions.
Thickness: 4-Inch vs. 6-Inch Slab
| Thickness | Cost Increase | When to Use |
|---|---|---|
| 4 inches | Baseline | Patios, walkways, light foot traffic |
| 5 inches | +20–25% | Heavy patio furniture, occasional vehicle |
| 6 inches | +40–50% | Driveways, RV pads, heavy loads |
A 4-inch slab is sufficient for almost all residential patios. The extra concrete for a 6-inch slab adds roughly $800–$1,200 for a 20×20 area, and is only necessary if you plan to park a vehicle on it.
Site Prep and Hidden Costs
- Sloped yards: Regrading a sloped area for a level slab can add $1,000–$3,500, especially if a retaining wall is needed.
- Access issues: If a concrete truck can't reach the pour site, a pump truck ($500–$900) or wheelbarrow labor ($300–$600) is required.
- Old patio removal: Tearing out and hauling away an existing concrete patio costs $2–$4 per square foot ($800–$1,600 for 400 sq ft).
- Soil quality: Expansive clay soils or poor drainage may require extra gravel base ($200–$600) to prevent cracking.
DIY Concrete Patio: Is It Worth It?
Pouring a 20×20 slab yourself can save 40–50% on labor ($1,200–$3,000). However, concrete work is unforgiving:
- DIY-suitable: Small pads (under 100 sq ft), if you've done concrete before
- Not DIY-suitable: A 400 sq ft patio — this is a 2–3 person crew job requiring precise timing, a power screed or bull float, and experience with control joints and finishing
- Biggest risk: A botched pour can't be fixed without tearing it out and starting over
Most homeowners should hire a pro for a 20×20 patio. The Concrete Cost Calculator shows you the labor vs. materials split so you can decide.
Regional Cost Differences
| Region | 20×20 Broom Finish Installed |
|---|---|
| Northeast | $3,500 – $5,800 |
| Southeast | $2,800 – $4,500 |
| Midwest | $3,000 – $5,000 |
| Southwest | $2,600 – $4,200 |
| West Coast | $3,800 – $6,500 |
Quick Tips
- Get 3+ quotes: Concrete pricing varies widely by contractor workload. You can save 20–30% simply by comparing bids.
- Pour in spring or fall: Summer heat causes concrete to set too fast (increasing crack risk). Mild temperatures produce stronger slabs.
- Don't skip the gravel base: A 4-inch compacted gravel base prevents frost heave and cracking. Cutting corners here guarantees problems in 2–3 years.
- Add control joints: Expansion joints every 8–10 feet prevent random cracking. They cost nothing extra — just insist on them.
- Seal after 28 days: Concrete needs a full month to cure before sealing. Sealing too early traps moisture and causes clouding.