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.
This guide covers everything you need to know about 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. Read on for detailed cost breakdowns, expert tips, and practical advice for US homeowners.
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 — enter dimensions, thickness, finish, and zip code to get an accurate price range.
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.