How Much Does a 20x20 Concrete Patio Cost?

A 20x20 concrete patio (400 square feet) typically costs between $2,400 and $6,400 for a plain broom-finish slab installed by a contractor, which works out to roughly $6 to $16 per square foot. If you want stamped or colored concrete, expect to pay $8 to $20 per square foot or more, pushing the total to $3,200 and up. Those ranges are wide because concrete pricing swings a lot based on your region, how much site prep is needed, and what finish you choose. But if you need a single number to start your budget, plan on $3,500 to $5,000 for a solid mid-range concrete patio at this size.

What goes into that price: the real cost breakdown

The total cost of a 20x20 concrete patio isn't just the concrete itself. There are four main buckets that contractors price out, and understanding each one helps you spot whether a quote is reasonable or missing something important.

Concrete material

A standard 4-inch slab at 400 square feet requires roughly 5 cubic yards of concrete. Ready-mix concrete typically runs $125 to $175 per cubic yard delivered, so the raw material cost lands somewhere around $625 to $875. That sounds cheap, but material is usually only 30 to 40 percent of the installed total. Labor, finishing, and prep drive the rest.

Base preparation

This is the step homeowners most often underestimate. Before concrete gets poured, the ground needs to be excavated, graded, and compacted. A 4-inch slab usually requires 4 to 6 inches of compacted gravel base underneath it. For a 20x20 area, excavation and base prep can add $300 to $700 to the job depending on soil conditions, how much material needs to be hauled away, and local labor rates. If your yard has clay-heavy soil or poor drainage, that number goes up.

Reinforcement

Concrete without reinforcement cracks. Most residential patios use either wire mesh or rebar (half-inch rebar on 18-inch centers is common for patios). Wire mesh is cheaper, running about $50 to $150 for a 400-square-foot area. Rebar is more labor-intensive and adds $150 to $400. Some contractors default to mesh to keep bids low, but if you're in a freeze-thaw climate or have expansive soil, ask specifically about rebar.

Labor and finishing

Labor is the biggest variable. Concrete work requires multiple people showing up the same day, working fast once the pour starts. Basic broom finishing is the cheapest labor-intensive option and still requires screeding, floating, and texturing. Expect labor to account for $2 to $6 per square foot depending on complexity and your area. Control joints need to be cut to prevent random cracking, and these are usually included in a full-service quote but worth confirming.

Plain concrete vs. stamped or colored: what the finish does to your bill

The finish level is one of the biggest price levers you have. Here's how the main options stack up for a 20x20 project.

Plain broom finish is the everyday workhorse. It's slip-resistant, holds up well in most climates, and costs the least. Colored concrete adds $2 to $4 per square foot but gives you a finished look that doesn't need much maintenance. Stamped concrete is the premium option and roughly doubles the base price. It looks great but requires sealing every 2 to 3 years to stay looking sharp. If stamped concrete is appealing but feels like a stretch for your budget, it's worth comparing to a stamped concrete patio to see if the look you want is achievable at your price point.

DIY vs. hiring a contractor: honest numbers

Pouring a 20x20 concrete slab yourself can realistically cut the total cost nearly in half. A DIY pour for 400 square feet might cost $1,200 to $2,500 in materials alone, skipping contractor labor markups. But concrete work has a hard deadline: once the truck shows up, you have roughly 90 minutes before the mix starts setting. If something goes wrong with your screeding, your forms, or you run short on crew, you can end up with an uneven slab that's expensive to fix.

Here's where most DIYers underestimate things: renting equipment (plate compactor, screed board, bull float, trowel) adds $150 to $300 for a weekend. You'll also need to handle concrete disposal, coordinate the ready-mix truck timing, and have enough help on site. Mistakes like poor grading, skipping control joints, or inadequate curing can cause premature cracking within a few years. If you're handy and have done flatwork before, DIY is a reasonable path. If this is your first pour, the savings may not be worth the risk on a 400-square-foot project.

If you want to keep costs low but aren't confident in full DIY, a middle path works well: do the excavation and gravel base yourself, then hire a concrete crew for the pour and finish. That approach can knock $500 to $1,000 off a contractor quote without taking on the riskiest parts of the job.

What site conditions and design choices actually do to your cost

Two patios at the same 20x20 size can have wildly different price tags depending on what's happening with the site. These are the factors that move the needle most.

• Slope and drainage: A sloped yard requires more excavation and sometimes drainage solutions like French drains or channel drains. Add $300 to $1,500 depending on severity.
• Soil conditions: Clay soil expands and contracts, increasing cracking risk. Contractors may recommend a thicker slab (5 or 6 inches instead of 4) or more compacted fill, adding $200 to $600.
• Slab thickness: Going from a 4-inch to a 6-inch slab adds roughly 50% more concrete. For 400 square feet, that's about $300 to $500 more in material alone.
• Access and location: If equipment can't easily reach the pour site (tight side yards, obstacles), labor costs increase because more work is done by hand.
• Existing concrete removal: Tearing out an old patio first typically runs $1 to $3 per square foot for demolition and disposal, so budget $400 to $1,200 for a full 20x20 removal.
• Permits: Many jurisdictions require a permit for new concrete flatwork. Fees range from $50 to $300 and inspections may be required before pouring.
• Region: Concrete labor costs vary significantly. The Northeast and West Coast tend to run 20 to 40 percent higher than the South and Midwest for the same work.

How to get accurate quotes and avoid getting burned

Getting three quotes is the standard advice, but what you ask for in those quotes matters more than how many you collect. Here's how to compare concrete bids without getting caught off guard.

1. Ask for a line-item breakdown. Every quote should separately list concrete (in cubic yards), base prep, reinforcement type (mesh vs. rebar), labor, finish type, and any extras like sealing or control joints.
2. Confirm the slab thickness. A 4-inch slab is standard for patios. Some low-ball quotes assume 3.5 inches, which can cause premature cracking. Get the thickness in writing.
3. Ask what 'installation' includes. Does it cover excavation? Gravel base? Haul-away? Control joints? A quote that's light on these items may grow once the job starts.
4. Ask about concrete mix strength. Residential patios should use at least 3,000 PSI concrete. In freeze-thaw climates, 4,000 PSI is worth the small premium.
5. Clarify who pulls the permit. If your area requires one, ask whether the contractor handles it or if you're expected to. Unpermitted work can cause issues when selling your home.
6. Get a timeline and payment schedule. Avoid paying more than 10 to 20 percent upfront. Final payment should come after you've inspected the finished surface.
7. Check for sealer. A curing and sealing compound applied right after the pour protects the surface. Confirm whether it's included or quoted separately.

Regional pricing is a real factor. If you're in a high-cost metro area like New York, Seattle, or San Francisco, the upper end of those ranges is more likely your starting point. In rural areas of the Midwest or South, the lower end is more realistic. Calling two or three local contractors for ballpark numbers before committing to a full quote process will help you calibrate fast.

How 20x20 compares to other patio sizes and materials

Scaling by size

Concrete patio pricing doesn't scale perfectly with size because some costs (mobilization, equipment delivery, permit fees) are more fixed. Smaller patios often cost more per square foot because those fixed costs get spread across fewer square feet. Here's a rough sense of how sizes compare at a mid-range installed rate of $10 per square foot. For a 15x20 concrete patio, pricing follows the same cost buckets but the total labor and materials scale down from a 20x20 slab 15x20 concrete patio cost.

A 20x20 is a sweet spot for residential patios. It's large enough to fit a full outdoor dining set and seating area comfortably, and the per-square-foot price tends to be more favorable than smaller slabs because contractor crews can work efficiently at this scale. Stepping up to a 20x30 adds 50% more square footage but doesn't always mean 50% more cost since the crew and equipment are already on site. For a 20x30 layout, costs change mainly because you’re ordering more concrete and base prep, plus your labor hours usually rise with the extra footprint how much does a 20x30 concrete patio cost.

Concrete vs. other materials at 20x20

Concrete is one of the most affordable patio materials to install, but it's not always the cheapest to own long-term. Here's how it stacks up against the most common alternatives for a 20x20 project.

If upfront cost is the main driver, plain concrete wins easily. A 20x20 paver patio typically runs $14 to $30 per square foot installed, which can push the total well past what a comparable concrete slab costs. That said, pavers offer one advantage concrete doesn't: individual units can be lifted and replaced if something shifts or a pipe needs access, whereas a cracked concrete slab often means sectional removal and repour. If you're considering pavers instead of concrete, you can use a similar breakdown to estimate how much a 20x20 paver patio costs DIY. If you're drawn to the look of pavers or natural stone but want to keep costs closer to concrete, stamped concrete offers a middle path, and a full comparison of stamped concrete at the 20x20 scale is worth checking before you decide.

The bottom line: for most homeowners who want a durable, low-maintenance outdoor surface at the lowest installed price, a plain or colored concrete patio at the 20x20 size is hard to beat. Get at least three itemized quotes, confirm what's included in your base price, and decide on your finish level before contractors come out so you're comparing apples to apples.