20x20 Concrete slab

Too many variables. Looking at a little over 5 yards of concrete (if 4” thick). Around here (Georgia) concrete is $215-225 a yard so you’re looking at ~$1200 just for the concrete with no labor. Throw in grading, forming, rebar, concrete finishing. Like I said, too many variables.

Always add in 10%

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Always add in 10%

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Exactly.

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Like using 4" for what's only 3.5 inches of form board

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Know how I know you haven’t poured much concrete?

If you can grade it that flat sure. I’d never trust it tho. Too many times the “scales were off” and it wasn’t the exact yardage ordered or the chute was a pos and leaked concrete while pouring. Then it’s a new driver who dumps concrete over the form. 10%, always.

Grade is rarely dead level at 4” and lots of potential “losses” when pouring.

To the OP, you’ll have to find someone who is willing to do it for you. 5 yards is a small job, so prices can vary a good bit. Also depends on what’s included as far as steel, footings, etc.

As a reference, I poured a big slab (4000+ sqft) earlier this year (March). I did a lot of work myself and subbed the different trades individually. But to get you in the ball park.

Turn Key was about $8/sqft. This was forming, steel, pouring, finishing, and breakdown (they provide and keep all materials).

Individual Labor Only:
Forming $0.30/sqft (as high as $1/sqft)
Pouring/Finishing: $0.70/sqft (as high as $1.50/sqft)
Concrete: $150/yd (with fiber)

Plus all the individual material costs for forming, keyways, stakes, etc. I formed, leveled the grade and set most of the keyways myself in about 2k sqft of the slab(s).

Thanks.

The slab is just for basketball goal and park a vehicle on.

I was quoted $1200 per day labor (2 days) + material (roughly $1000).

Total expected about $3500.

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I'd pay that

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In a heartbeat

I paid $1,900 to have 2 separate sections added to my driveway last spring. 5 yards of concrete, dug out with shovels and leveled, framed and meshed.

Not a lick of English was spoken that day - we communicated with the most absurd hand signals, but the grade for drainage into the existing driveway slope is immaculate.