Ashburn, VA

Ashburn, VA

# How Much Does It Cost To Pour A Concrete Slab?

$5 –$10cost per square foot

To pour a typical 10' x 10' concrete slab will cost $670 to$930, a 12' x 12' slab for a patio will cost $800 to$1,500, a 20' x 24' driveway slab runs between $1,400 and$3,400, and a 24' x 24' slab for a garage will cost $3,100 to$5,900.

Get free estimates for your project or view our cost guide below:

## $5 –$10cost per square foot

To pour a typical 10' x 10' concrete slab will cost $670 to$930, a 12' x 12' slab for a patio will cost $800 to$1,500, a 20' x 24' driveway slab runs between $1,400 and$3,400, and a 24' x 24' slab for a garage will cost $3,100 to$5,900.

Get free estimates for your project or view our cost guide below:
Written by
Tom Grupa

## Concrete Slab Cost

A typical concrete slab costs $5 to$10 per square foot with most homeowners spending $6 to$8 per square foot, or $120 to$170 per cubic yard for both materials and installation. Your final cost will depend on the slab's size, thickness, and if you any special reinforcement such as wire mesh or rebar.

Concrete Slab Cost
Slab Type Typical Size Average Cost
Shed 10' x 10' $670 –$930
Patio 12' x 12' $800 –$1,500
Driveway 20' x 24' $1,400 –$3,400
Garage 24' x 24' $3,100 –$5,900

## Concrete Slab Prices By Size

A typical concrete slab will cost between $110 and$130 per cubic yard (27 cubic feet) or $5.40 to$6.20 per square foot on average. Four- to eight-inch thick concrete slabs are mainly used for driveways, patios, sidewalks, and garage floors.

A 6" thick concrete slab is much more structurally sound than a 4" slab and may only cost $100 more in concrete depending on your slab size. At an average cost of$6.20 per square foot for a 6" slab, here are the average prices by size:

Concrete Slab Cost By Size
Slab Size Square Feet Average Cost Installed
8' x 8' 64 $395 10' x 10' 100$617
12' x 12' 144 $888 15' x 15' 225$1,388
20' x 20' 400 $2,468 24' x 24' 576$3,554
20' x 30' 600 $3,702 30' x 30' 900$5,553
30' x 40' 1200 $7,404 40' x 60' 2400$14,808

Hire a concrete slab professional.

### Costs To Install Concrete Slab

Concrete slab installation costs a minimum of $5.40 per square foot for a 4" thickness, and as high as$10.60 per sq. ft. for a 6" slab with thicker edges, styrofoam beneath the slab, and wire mesh. Adding radiant heat, extra dirt work, or grading to the sub-base costs extra.

If you want to add additional reinforcement due to poor soil conditions, or if you're worried about big cracks, put some structural reinforcing metal in the concrete foundation with either wire mesh or rebar. Also, if your going to go with 4" thick slab, reinforcing metal is highly recommended to make your slab structurally sound.

Costs To Install Concrete Slab
Item Average Cost Per Square Foot
4" Slab Base Price $5.35 Increase to 6" Slab +$0.50 – $0.85 Thicker Edges (From 12" - 2') +$1.00 – $1.50 Vapor Barrier +$0.50
2" Styrofoam + $2.00 Wire Mesh +$0.35
Pump Truck
(If Concrete Truck Can't Reach)
+ $900 flat Total Range$5.35 – $10.55 ## Cost of Concrete The average cost of concrete ranges from$2.80 to $3.60 per square foot depending on the thickness of the slab poured. The quality of the concrete will depend on how much water vs. cement is mixed in with the aggregate and how clean the water and aggregate are. Cost Of Concrete Slab Thickness Average Cost Per Square Foot 4”$2.80
5” $3.20 6”$3.60

### Concrete Slab Cost Per Square Foot

On average, pouring a concrete slab costs $5.40 to$6.20 per square foot for both labor and materials. Your total price depends on the thickness of the slab, and if you chose to reinforce your slab with wire mesh or rebar.

Concrete Slab Cost Per Square Foot
Slab Thickness Materials Labor Average Cost (SF)
4” $2.80$2.50 $5.30 5”$3.20 $2.60$5.80
6” $3.60$2.60 $6.20 ### Concrete Cost Per Cubic Yard Concrete costs$110 to $130 per cubic yard. Many contractors will quote based on the cost per cubic yard rather than by square foot. A cubic yard of concrete will cover 100 square feet x 3 inches deep or 27 cubic feet. ## Average Cost To Pour Concrete To pour a typical 10' x 10' concrete slab will cost$670 to $930, a 12' x 12' slab for a patio will cost$800 to $1,500, a 20' x 24' driveway slab runs between$1,400 and $3,400, and a 24' x 24' slab for a garage will cost$3,100 to $5,900. Cost To Pour Concrete Concrete Slab Average Size Average Cost Installed Shed 10' x 10'$670 – $930 Patio 12' x 12'$800 – $1,500 Driveway 20' x 24'$1,400 – $3,400 Garage 24' x 24'$3,100 – $5,900 Consult with a concrete slab professional. ### Labor Cost For Concrete Slab The cost of labor to pour concrete is$45 per hour. There can also be a delivery fee of $60. To have concrete poured and finished, it will cost$2.50 to $2.60 per square foot for the labor, and$2.80 to $3.60 per square foot for the concrete itself. Concrete slabs are poured either off or on the job site. Smaller slabs, such as the hot tub base can easily be poured offsite and then delivered to your home. Larger slabs, such as a driveway, are poured onsite. ### Cost To Pour Concrete Patio Slab A concrete patio is generally 4” thick and costs$5.50 to $10.25 per square foot to install. For a typical 12' x 12' patio slab costs range from$800 to $1,500. Always reinforce slabs that are 4” thick with rebar for strength. Your final cost may be affected by many design factors. • A simple square or rectangular patio will be the most economical. • Curves, although attractive, cost more due to the mold that needs to be constructed. • Walkways can add a nice aspect to a yard, especially if you have different kinds of flower beds. • Site prep – The ground needs to be level, and any rocks or branches will need to be removed. ### Cost Of Concrete Slab For Shed The cost of a 10' x 10' concrete slab for a shed ranges from$670 to $930 while a 20' x 20' slab runs around$2,700. The recommended thickness of your shed's slab is 4” deep. The following prices include materials and professional installation for a 4” deep slab:

Cost Of Concrete Slab For Shed
Shed Size Average Cost
10' x 10' $670 12' x 12'$920
12' x 16' $1,300 20' x 20'$2,700

### Concrete Slab For Garage Cost

A typical 24' x 24' garage slab costs $3,100 to$5,900 with prices ranging from $5.30 to$8.30 per square foot for a 4” reinforced slab of concrete, and $6.80 to$10.30 per square foot for a 6” slab of reinforced concrete.

Garage Slab Cost
Garage Foundation Size 4” Slab Cost 6” Slab Cost
1-car Garage (10' x 20') $1,062 –$1,662 $1,366 –$2,064
2-car Garage (20' x 20') $2,124 –$3,324 $2,732 –$4,128
3-car Garage (30' x 20') $3,156 –$4,986 $4,098 –$6,192

### Concrete Slab Driveway Cost

A basic concrete slab driveway costs $4 to$8 per square foot, with more advanced designs, patterns and colors ranging from $8 to$18 per square foot. You can dress up your driveway slab with engraving, a textured finish, exposed aggregate, a stencil design, or it can be scored and stained.

Concrete Slab Driveway Cost
Price Range Features
$3 –$7
• Basic concrete driveway slab
$8 –$12
• Textured concrete finish
• Exposed aggregate
• A stencil design
• A simple border
• Color
$12 –$18
• Some engraving – your last name perhaps?
• 2  or more colors or patterns
• 2–3 colors, with a contrasting border
• Scored and stained concrete
$18+ • Borders, saw-cut designs, or hand-applied accents using chemical stains • Multiple scoring patterns and different stain colors • Hand-applied accents with advanced stenciling techniques ## Concrete Slab Foundation Cost Most homeowners spend between$5.40 to $6.40 per square foot for a 4” thick foundation, and$6.40 to $8.20 per square foot for a 6” reinforced slab on grade. A 1,600-square-foot reinforced concrete slab foundation costs$11,700 on average.

The cost includes “fine grading, slab base, forms, vapor barrier, wire mesh, 3,000 PSI concrete, finishing, and curing. For thickened edge slabs, add the area of the thickened edge. Use 500 square feet as the minimum job size."

### Concrete Foundation Types

The three main types of concrete foundations are T-shaped, slab-on-grade, and frost protected.

• T-Shaped – Slab with footing below the frost line that’s poured after the walls are constructed

• Slab on Grade – Slab poured over internal reinforcement of rebar and wire mesh

• Frost Protected – Slab poured over polystyrene insulation, with additional polystyrene insulation outside the foundation wall

Slab on grade refers to a concrete slab that's used as a foundation for a structure. The slab is created from a mold built into the ground that’s reinforced with rebar and wire mesh. The frame is constructed from wood, and the concrete and aggregate are poured into the mold to harden.

The three types of concrete slab on grade are:

• Slab on the ground – Slab with concrete beams around the perimeter

• Stiffened raft slab – Slab with concrete beams set in a grid throughout the slab

• Waffle raft slab – Above ground slab poured over polystyrene “void forms”

### Concrete Slab Thickness

Most residential concrete slabs are between 4” and 6” inches thick with the minimum recommended being at least 4”. This thickness is recommended for walkways, driveways, patios, and garages.

Commercial driveways can be 6” to 8” inches thick to bear up under traffic from heavier delivery vehicles. Check local building codes to find out how thick your concrete slab needs to be.

Another factor impacting the thickness of the slab is the type of soil that is underneath. In prepping for the concrete, the soil must be tamped down well and covered with a layer of gravel or sand.

A licensed concrete contractor will know how much gravel to lay and how to properly prep the soil.

Concrete Slab Cost By Thickness
Slab Size 4” Thick 6” Thick
20' x 20' $2,100 –$3,300 $2,700 –$4,100
30' x 20' $2,700 –$4,200 $3,400 –$5,200

Concrete grades are based on the strength of the concrete after 28 days. Different grades of concrete are required for different uses. A residential grade is different from commercial grade, especially where a several story building is concerned.

Numbers followed by the letter M indicates the different grades. The letter M refers to Mix, and the number relates to ratio amounts of cement, sand, and loose aggregate all mixed with water.

M15–M25 For most residential uses. M15 is 1:5:10 (cement:sand:loose aggregate)

M25–M45 For commercial uses. M25 is 1:1:2.
M50–M70 For commercial uses requiring greater strength*

*Everything over M25 is considered a design mix, and lab tests are necessary to determine those ratios. Ratios above M25 are used for extensive construction projects requiring high strength.

## Concrete Slab Cost Calculator

The average cost of concrete is $3.50–$5.50 per square foot for a 6” slab. The price can go up based on further requirements for the job. Factors that can influence prices are grading, base, forms, thickness, finishing, and concrete mix characteristics.

Concrete Slab Cost Calculator
Item Cost
Land grading and shaping costs $24/CSF Aggregate 4" base$65/CSF
Layout and set edge forms $144 per 50 LF .006" polyethylene vapor barrier$12/CSF
Place W2.9 x W2.9 x 6" x 6" mesh $61/CSF Place ready-mix concrete, from chute$170/CSF
Steel trowel finish $32/CSF Acrylic concrete cure and seal$31/CSF

### Rebar For Concrete Slabs

To ensure your slab or foundation is structurally sound, professionals highly recommend adding steel rebar, especially if you go with a 4” thickness. This thickness is particularly helpful if you have poor soil conditions, or want to prevent big cracks.

• Reduce the thickness of your slab from 6” to 4” and save $0.50 cents per SF. • A vapor barrier underneath the slab will add$0.50 cents per SF.

• If your slab is in a hard-to-reach area and the concrete truck can’t reach it, you’ll need the services of a pump truck, adding approximately $900 to the cost estimate. • Some slabs will require thicker edges, costing an additional$1 to $2 per SF. ## Types Of Concrete Slabs • Modern Concrete – Typical concrete mixed and used every day • High-Strength Concrete – Has a strength over 6,000 psi (pounds per square inch) • High-Performance Concrete – Performs well in inclement weather • Ultra-High-Performance Concrete – Needs no rebar and has a strength of 29,000 psi • Stamped Concrete – “Stamped” with a decorative mold to make it look like stone, brick, and more, usually needing a sealer to keep its decorative component • Self-Consolidating Concrete – Eliminates the need for vibrations (the cement mixer) and is mainly used in restricted and hard-to-reach areas • Glass Concrete – Using recycled glass as the aggregate to create a visually appealing concrete • Asphalt Concrete – Very fast-hardening concrete that is used mainly in building roads and airports • Permeable Concrete – Allows water to pass through and is used in areas around storm drains ## Pros and Cons of Concrete Slab Foundation ### Pros • Less expensive than wooden floor joists and wood construction • Fast – a floor can be poured in a day or less • Lower utility bills due to no crawl space under the house to allow hot/cold air through • No problems with mold, mildew, rodents, or insects ### Cons • The lack of a crawl space means all furnace parts and ductwork must be installed above the floor. • Plumbing is under the slab, and leaks are not always noticeable until you receive a very high water bill. • Concrete slabs can crack due to variations in moisture and the weather. ## Staining, Stamping, and Fine Finishes Concrete has lent itself to a new art form in the practice of staining, stamping, and applying fine finishes to it. Stamping the concrete on your driveway can give your house a whole new look, upping the curb appeal. • Staining Concrete – Concrete can be stained or painted in many different colors, adding to the visual impact of your home and yard. Concrete staining costs$3.70 to $7.70 per square foot. • Stamped Concrete – While staining or painting concrete can be done after it hardens, stamping must be done before the concrete sets. Instead of looking like a large, gray surface, you can mimic the look of cobblestones, tiles, stones, or even brick. The cost of stamping concrete is$11.20 to $13.40 per square foot. • Smooth Finishes – Concrete can be polished and receive different kinds of finishes. An epoxy floor coating can be applied for$4.50 per square foot.

• Concrete Sealer – After you install your concrete driveway or patio, or any concrete surface that will be exposed to the elements, it needs to be sealed. The sealer will protect it from stains, oils, de-icing salt, and the water damage that occurs with freeze/thaw cycles. Sealers cost $4.50 per square foot and pros charge about$86 per hour for application labor.

## Concrete Slab Repair Costs

Concrete can crack and ruin the look of a patio or driveway. Depending on the size of the crack, it costs  $500 to$2,500 to repair one. Sometimes drainage will cause problems, and that moisture can be directed away from the concrete slab. Correcting drainage problems can cost $1,100 to$5,500.

### Concrete Slab Crack Repair

• Concrete expands and contracts with the temperature. In hot weather, it can expand, and if it meets with an unmovable object, it will crack.

• The growth of tree roots underneath the concrete slab can cause cracks as they grow larger, pushing the dirt up under the concrete.

• The settling of soil as time goes on can cause cracks.

• Water can get under the slab and cause some erosion. Anything shifting under the concrete slab can cause cracking.

• Excessive weight on the concrete slab can crack it. Know how much weight a concrete slab can safely bear.

## Concrete Slab FAQs

### How much is concrete?

Concrete costs $110 to$130 per cubic yard or $2.80 to$3.60 per square foot depending on the thickness of the slab poured. It will cost an additional $2.50 to$2.60 per square foot for the labor.

## Getting Concrete Slab Estimates

Before hiring a concrete contractor, be sure to:

• Get at least three estimates to compare.

• Look for companies that are licensed, bonded, insured, and have been in business for 5+ years.

• Look for contractors experienced in pouring concrete slabs.

• Check out their reviews on HomeGuide and Google.

• Ask for references with contact information.

• Avoid going with the lowest quote as quality may suffer.

• Get a detailed contract and warranty in writing before the project starts.

• Never pay in full before the work is complete.