Garage slab cost on our calculator runs $5.32 to $15.61 a square foot for the pour. A 2-car pad of 500 square feet runs $2,800 to $9,250 before the drive cost, which is our trip to your site. That price covers the concrete work only: the forms, the steel, the pour, and the finish. The range is wide because a 4-inch pad under a minivan and a 6-inch pad under a two-post lift are not the same slab.
Don’t mix up two prices when you compare bids. This page prices the pad. The epoxy or polyaspartic coating that goes on a cured slab is a separate job with its own number. It runs $8.55 to $10.39 a square foot on top of the slab, and our garage floor coating cost page walks through it. If you’re pricing a shop floor, an inside pad, or a commercial pour instead, the concrete slab cost guide covers more shapes.
What does a garage slab cost by size?
We pour garage pads two ways, and both are builds of the same Slab Boss Pour. A standard build has a broom or trowel finish, with no coating planned. It starts at $5.55 a square foot. A SPEC build is poured and cured so a polish or coating can go down later without fix-up work first. It costs more, and the next sections show where that money goes.
| Garage Size | Approximate SF | Our calculator, before the drive cost |
|---|---|---|
| 1-car garage | 220 to 260 SF | $1,400 to $5,450 at 240 SF |
| 2-car garage | 440 to 576 SF | $2,800 to $9,250 at 500 SF |
| 3-car garage | 660 to 864 SF | $4,150 to $13,050 at 760 SF |
| Oversized / workshop bay | 900 to 1,200 SF | $5,400 to $16,550 at 1,000 SF |
The low end of each row is the plainest standard build. The high end has every calculator option turned on: the SPEC build, rebar, the thickest vapor barrier, and add-ons. Going from standard to SPEC, the SPEC pour (a denser mix, placed flatter) adds $0.64 a square foot. The wet cure adds $0.14 over a spray-on cure. These table totals also count setup, so a single rate on this page can look a little lower than the table. The quote tool adds the drive cost for your address on top, as its own line.
Most home garages land in the 2-car row, somewhere between 440 and 576 square feet. Where you fall depends on things like a workbench wall or a third door. The spread in each row is not the same work priced higher. It’s more work, and different work: a denser, flatter SPEC pour and a 7-day wet cure, plus options like rebar and a plastic sheet under the slab. The workshop bay is where the gap between the two builds starts to hurt. Every extra dollar a square foot gets multiplied by a big floor. That’s the row where it pays to know what the floor will do before the trucks show up. To get your own number, enter your size and pick your options in the quote tool.
A clean site keeps you toward the low end. That means no old slab to break out, no fill dirt to haul in, and a truck that can back up close enough to pour straight from the chute. Tearing out, fixing soft ground, and tight access are real costs, and we quote them as their own lines. When a bid hides them inside one price per foot, two bids on the same garage can end up thousands of dollars apart.
What moves the price inside that range?
Seven things move it, and only two of them show once the floor is done.
Thickness. A 4-inch slab handles typical car and truck loads, and that honestly describes most garages. Put a two-post lift, welding gear, or anything on wheels heavier than a pickup in the building, and you want 5 to 6 inches. Enter the thickness in the quote tool, and it adds the extra concrete before anyone talks about steel.
Steel. Wire mesh is the budget pick, and it’s the right call for a light garage. It runs $0.63 a square foot. Rebar, most often #4 bars on 18-inch centers, runs $2.12. It costs more, and it earns it the first time a jack stand, a lift post, or a parked truck puts its weight on one spot. Mesh holds shrinkage cracks together. Rebar carries heavy weight on a small spot. They don’t do the same job. A bid that won’t say which one you’re getting is hiding a real gap in steel and labor.
The ground under the slab. The dirt under a slab is called the subgrade, and it decides how long the slab stays flat. Loose fill, a soft spot where a tree stump came out, or a trench filled last week and never packed down will all settle. Concrete that loses its support cracks over the hole. Fixing the subgrade means packing the dirt down in layers and proving it holds, and that takes machine time.
Thick edges. The door opening and the walls usually get a thicker edge, often 12 inches deep, called a turn-down edge. That’s where tires cross onto the slab and where the slab meets the building. It takes more concrete, more forms, and more digging.
Tearing out the old slab. If you’re pricing a garage floor replacement, this is the line to watch. Someone has to break out the old slab and haul it off. On our calculator that runs $2.30 a square foot for a 4-inch slab with no steel in it. Thicker or reinforced slabs may cost more. It’s the biggest reason a replacement quote runs higher than a new pour on the same footprint.
Access and slope. A pad we can reach from the street with the truck’s chute prices differently than one behind a house on a hill. Pumping the concrete, wheeling it in by cart, or reshaping the ground before the pour all add hours.
What happens to the floor later. A slab meant for a coating or a polish gets built differently from day one. That’s the standard-versus-SPEC choice, and it gets its own section below.
A garage slab is the one part of the project you don't get to redo
Once a garage slab is poured and cured, everything else sits on top of it: the walls, the epoxy, and the cars. You make that choice once. A thin slab, a slab with too little steel, or one that dried out too fast will crack under heavy tires and hard freeze-thaw winters. It also makes a poor base for any coating you add later. Before you compare bids on price, ask every crew to put the slab thickness, the steel, and the cure in writing.
What’s the difference between the standard build and the SPEC build?
The standard build is an honest garage pad. We form it, set the steel, pour it, level it, and give it a broom or trowel finish. It’s sized to carry cars and whatever you hang on the walls. If the floor is going to stay bare concrete, that’s the right build, and there’s no reason to spend more. The SPEC build changes three things. The mix goes denser, 3,500 PSI and up, so a grinder has something solid to cut into. The flatness gets held to FF 50 or better, where plain flatwork passes at FF 25 to 30. And the slab gets a real wet cure, not a spray-on curing compound. That spray leaves a film that a polishing crew has to grind off later, at your cost. You’re not buying a better-looking pour. You’re buying one that won’t need repairs before it can be finished.
Two terms from that list show up on other bids too. PSI is the strength number for the concrete, and FF is the flatness score, where a higher number is flatter. A slab that will carry a coating inside the house often gets a vapor barrier too. That’s a plastic sheet under the concrete that keeps ground water from rising through it. The 15-mil sheet runs $0.60.
Tell us about a future coating before the pour
Tell us sooner than feels needed. “We might epoxy it someday” changes the mix, the flatness goal, and the cure. All three get decided within hours of the pour, not months later. Tell us when we quote, and the slab gets built for the finish. Tell us two years later, and the grinding crew inherits whatever the pour crew guessed. The reverse saves people money. If the floor is staying bare concrete, say so, and skip the SPEC work entirely.
Does a garage slab cost more in Oklahoma than anywhere else?
Less than you’d expect. Concrete is sold by the cubic yard from a plant close to your job. Its price doesn’t swing the way coastal finish trades do. Rebar and mesh sell at close to the same price across the country too. What really moves between markets is labor, and crew pay in Oklahoma sits below the coasts.
The bigger local question here isn’t price. It’s the ground. Central Oklahoma clay and hard freeze-thaw winters, when water in the concrete freezes and thaws over and over, both punish a thin slab with too little steel. A slab spec that’s merely fine in a mild climate is the one that cracks here.
What’s included in a garage slab quote, and what isn’t?
A Bel Covo pour includes the layout and forms, and it includes packing the subgrade down to spec. It includes a vapor barrier where the garage is heated or cooled, or where a coating is planned. It includes the steel you pick, the concrete, the pour, and the finish. We cut the control joints, which are shallow saw cuts that tell the slab where to crack. It also includes the cure, pulling the forms, cleanup, and the drive to your site inside our normal service area.
Some things are not included. We quote each one as its own line when it applies:
- Tearing out and hauling off an old slab
- Big grading jobs or fill dirt brought in
- Footings or retaining walls beyond a normal thick edge
- Permits, where your town requires one
- The coating or polish itself, which is a separate job
Get your garage slab price online
Enter your garage size and address. The quote tool gives you a price range for the pour, and it adds the drive cost for your address.
How do you get an accurate garage slab price?
For a simple new pour, the online tool is faster than a phone call. Enter the size, the address, and what the floor has to do. You’ll get a price range in about 2 minutes, with the drive cost listed on its own line, and no salesperson calls you at dinner.
Call (888) 852-3528 when the job has a tear-out, an addition that ties into an old foundation, or a slope that needs a look. Those jobs are priced off what’s on the site, and the tool can’t see that. A two-minute call beats a number that has to be changed later.
Why do garage slab bids come in so far apart?
Two bids can use the same words and price different work. We manage four controls on every pour, and each one is a place where a cheaper bid can save money without saying so.
- Set is the ground work: preparing and packing the subgrade and keeping water out from under the slab.
- Portland is a mix matched to what the floor will really do, not whatever the plant sends by default.
- Even is flatness, held tighter on any slab headed for a polish or coating.
- Cure is a real curing plan, not a spray-on compound that’s cheaper to put down and costly to take off.
Read a low bid against those four, and it usually explains itself. Our Pour-4-Polish page covers each control in detail, so you can ask better questions of everyone bidding your job, us included.
What a well-built slab gets you over 30 years
A well-poured slab of 4 to 6 inches, carrying normal home loads, should last 30-plus years with little more than a sealed crack now and then. Nothing about that is fancy. It’s a floor that stays flat and holds a coating whenever you want one. It never becomes the reason you’re moving cars out of the garage on a Tuesday.
The cheap slab costs less exactly once, and then it charges you for the rest of the building’s life. Enter your garage size in the quote tool to see what doing it right costs.
Related pages
- Garage slab services: what we deliver on a garage pour, from the dirt work to the final finish
- 40x60 concrete slab cost: a detached shop or outbuilding
- Garage floor coating cost: what goes on top, priced on its own
- Concrete slab cost: the wider guide to garage, inside, and commercial pours, including the shapes this page doesn’t cover
Pour it right the first time
A garage slab is the one part of the project nobody wants to redo. Get a price for the pour, built for how you'll really use the floor.
