Concrete slab cost calculator

Enter the slab area and type, add tear-out or leveling, and enter your ZIP. Per square foot prices come from This Old House, HomeAdvisor and Bob Vila.

$5,400Typical 30 by 30, 4 inch slab

$4 to $8A sq ft (This Old House)

$8 to $28A sq ft stamped (Bob Vila)

Concrete slab cost

$3,600 to $7,200

Typical $5,400 (US average)

$6.00Per sq ft, all in, typical

$3,600Low

$7,200High

Free. Your numbers become an estimate you can send from your phone.

How we got this

4 inch slab, broom finish, installed$4.00 to $8.00 a sq ft (typical $6.00)This Old House $4 to $8 a square foot; HomeAdvisor $6 for a 4 inch slab. Typical is the middle of This Old House's midpoint and HomeAdvisor's figure.
Slab area900 sq ftLow, typical and high each times 900.
RegionUS average prices (no ZIP entered)Enter a ZIP to scale the labor part of the price to your state's wages.
Total$3,600 to $7,200, typical $5,400

Item	Qty	Low	Typical	High
Concrete slab, 4 inch slab, broom finish	900 sq ft	$3,600	$5,400	$7,200
Total		$3,600	$5,400	$7,200

Sources: This Old House, concrete slab cost; HomeAdvisor, concrete slab cost; Today's Homeowner, concrete slab cost; Bob Vila, stamped concrete patio cost; HomeAdvisor, patio cost; BLS Occupational Employment and Wage Statistics, May 2025 (state and national files); US Census Bureau, 2020 ZIP Code Tabulation Area to county relationship file. Checked 2026-10-09.

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Key takeaways

A concrete slab usually costs $4 to $8 a square foot, This Old House says.
HomeAdvisor and This Old House both put a 30 by 30 slab at $3,600 to $7,200.
Thicker slabs for driveways and garages cost more; stamped and colored slabs cost far more.
Tear-out of old concrete and leveling a sloped site are separate lines.

Slab cost per square foot

Slab	Price a sq ft	Source
Typical slab	$4 to $8	This Old House
4 inch	$6	HomeAdvisor
4 to 6 inch	$6 to $9	HomeAdvisor
4 to 8 inch	$6 to $12	HomeAdvisor
Stamped	$8 to $28	Bob Vila

Common slabs

This Old House lists typical prices: a car parking pad $1,200, a patio $3,000, a driveway $3,000 and a garage $3,500. HomeAdvisor's area table puts 100 square feet at $600 and 400 square feet at $2,400.

Tear-out and site prep

HomeAdvisor says removing an old patio surface costs $2 to $6 a square foot. Today's Homeowner says removing severe slopes and leveling adds $1 to $3 a square foot.

A worked example

A 30 by 30, 4 inch slab at the US average comes to $3,600 to $7,200, about $5,400 typical, or about $9,000 with tear-out of the old one. A 300 square foot stamped patio is about $5,400. Enter a ZIP to scale the 50% labor share.

Quoting slabs

Thickness and reinforcement on the estimate.
Base prep and forms.
Deposit before the pour. Koira takes it on approval.

Send it from Koira.

Last checked October 9, 2026. More for your trade: how trades run on Koira.

FAQ

How much does a concrete slab cost per square foot?

This Old House says $4 to $8 a square foot.

How much is a 30 by 30 concrete slab?

HomeAdvisor and This Old House say $3,600 to $7,200.

How much does stamped concrete cost?

Bob Vila says $8 to $28 a square foot.

How much does it cost to remove old concrete?

HomeAdvisor says $2 to $6 a square foot.

How thick should a slab be?

Four inches for patios and walks; thicker for driveways and garages.

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Price a jobDriveway cost calculatorConcrete, asphalt or pavers by the sq ft, with the yards of concrete to order.Price a jobPaver patio cost calculatorConcrete, brick or stone pavers, per square foot.