10×10 Concrete Slab Cost: Complete Pricing & Material Breakdown

Quick answer: a 10x10 concrete slab (100 sq ft) at 4 inches thick costs about $840 to $1,430 installed by a contractor, or $410 to $570 in materials if you pour it yourself. It needs 1.23 cubic yards of concrete, or 1.36 yd³ with 10% waste, which is 62 bags of 80-lb mix.

A 10x10 slab is the classic size for a small shed, a hot tub or AC pad, a grill area or a landing outside a back door. It is small enough to pour by hand in a morning, but big enough that the choice between bags and a ready-mix truck really changes the price. This guide shows where every dollar goes, what changes at 5 and 6 inches, and how to decide whether to do it yourself.

10x10 Slab Cost at a Glance

Four inches is right for a shed, patio or walkway. Go to 5 inches if a riding mower, ATV or small car will sit on it, and 6 inches for a hot tub that holds a lot of water or for anything heavier. Each extra inch adds about a quarter more concrete, but labor and forms barely change, so the total rises more slowly than the volume.

Line-Item Breakdown for a 4-Inch 10x10 Slab

These are the same line items and default rates our slab cost calculator uses. The full-scope total is the calculator's default scope, which a fair contractor price should sit close to before overhead and profit.

A bare-bones version with no rebar or vapor barrier and labor at $3.50/sq ft comes to about $837, which is the low end of the installed range. The high end adds 25% for contractor overhead and profit on the full scope. Excavation and a compacted gravel base are not in either number; budget roughly $1.40 to $3.30 per sq ft ($140 to $330 for 100 sq ft) if the ground needs digging out and a base brought in.

Bags or Ready-Mix for a 10x10?

At 1.36 cubic yards, a 10x10 sits right on the line. Here is what each route takes for a 4-inch slab with 10% waste:

• 80-lb bags: 62 bags (0.60 cu ft each) at about $6.50 = $403. That is over 2.5 tons to lift, mix and place.
• 60-lb bags: 82 bags; 40-lb bags: 123 bags. Smaller bags are easier to carry but cost more per cubic foot.
• Ready-mix: about $324 including the delivery fee, if the supplier will bring a small load. Many plants have a minimum of 5–6 yards and add a short-load fee (often $80 to $200 flat, or $30 to $45 per yard you are short), so call two suppliers before deciding.

Rule of thumb: below about 1 cubic yard, bags usually win. Above about 1.5 yards, a truck usually wins. A 10x10 is in between, so the deciding factors are the short-load fee in your area, whether the truck can reach the forms (a chute reaches about 15 to 20 ft), and whether you have the help to mix 62 bags before the first ones start to set. A rented mixer and three people make the bag route realistic. Our ready-mix vs. bagged concrete guide walks through the break-even in more detail.

DIY Materials List for a 10x10 Slab

• Concrete: 62 × 80-lb bags, or 1.36 yd³ ready-mix (order to the nearest quarter yard the supplier allows).
• Gravel base: about 1.42 yd³ of crushed stone for a 4-inch compacted base (includes 15% for compaction). See the gravel base calculator.
• Forms: 40 linear ft of 2x4 (or 2x6 for a 5 or 6-inch slab), plus stakes every 3 to 4 ft and screws.
• Reinforcement: 8 bars of #4 rebar at 18 in centers and about 16 chairs, or a 10x10 area of welded wire mesh on chairs for light foot-traffic use. The rebar calculator lays out the grid.
• Vapor barrier: 6-mil polyethylene if the slab will be under a shed or other enclosed space.
• Tools: mixer (rent), wheelbarrow, screed board, bull float, edger, groover, broom, and curing compound or plastic sheeting.

Worked Example

One control joint across the middle in each direction splits the slab into four 5x5 panels. That keeps every panel well inside the usual rule of 2 to 3 times the thickness in inches, in feet (no more than about 10 ft for a 4-inch slab). Cut or tool the joints to a quarter of the slab depth.

What Pushes the Price Up

• Site prep: digging out sod and soft soil and bringing in a gravel base adds roughly $140 to $330 on 100 sq ft.
• Access: if the truck cannot get within chute reach, a line pump costs $400 to $800 for the job, which can double the price of a small pad. Wheelbarrowing is the cheaper alternative.
• Finish: a stamped finish runs about $6.00 to $12.00 per sq ft instead of $0.50 to $0.80 for broom, and the finishing labor rate rises too.
• Old slab removal: breaking out and hauling away an existing 4-inch slab runs about $3 to $4 per sq ft. Try the removal cost calculator.
• Permits: many towns do not require one for a small detached pad, but some do, at roughly $50 to $350. See do you need a permit for a concrete slab.

DIY or Hire a Pro?

A 10x10 is the most DIY-friendly slab size there is. The concrete fits in one session, the screed board is short, and a mistake costs hundreds rather than thousands. A contractor crew will spend roughly 3.5 crew-hours placing and finishing it, and most of what you pay for is their setup time and minimum charge. Hire out if the slab will carry a structure that has to be level (a prefab shed with a tight floor tolerance), if the site needs real excavation, or if you have never finished concrete and the slab will be on show. Our DIY vs. contractor guide covers the trade-offs, and if you already have a quote, check it against a fair price with the concrete quote checker.

Comparing sizes? See the 12x12, 20x20 and 24x24 breakdowns, or the cost per square foot matrix.

Sources and Method

Quantities use the standard volume formula and published bag yields. Prices are this site's working benchmarks (see our methodology), and they vary by region and season. Thickness and base guidance follows the International Residential Code (section R506, concrete floors on ground) and ACI 302.1R, the American Concrete Institute's guide to floor and slab construction.