30x50 Concrete Slab Cost
A 30x50 concrete slab costs $12,802 to $21,336 installed at 5 inches with rebar ($8.53 – $14.22 per square foot). The calculator below reprices it for your ZIP, finish and thickness.
LIKELY INSTALLED PRICE
$17,069
Our installed range for this 30×50 ft, 5-inch slab: $12,802 – $21,336 ($8.53 – $14.22 per sq ft)
In plain terms: that's about the size of a workshop or pole-barn floor, and roughly 43% of the price is the crew's labor.
- DIY materials
- $9,851
- Concrete
- 23.15 yd³
- Bagged mix
- 1,146 80-lb bags
- Delivery
- 3 trucks
An estimate, not a bid. A contractor's price depends on your site, access and timing.
What changes the price
Where the money goes
- Materials$8,122
- Labor$6,102
- Overhead and profit (20%)$2,845
All 8 line items
| Item | Qty | Material | Labor | Total |
|---|---|---|---|---|
| Site setup, layout and cleanup | 1 job | $100 | $56 | $156 |
| Excavate and grade subgrade | 1,500 sqft | $0 | $1,665 | $1,665 |
| Forms, stakes and form release | 160 lf | $192 | $355 | $547 |
| Compacted crushed-stone base | 25.93 ton | $1,167 | $480 | $1,646 |
| #4 rebar, tied on chairs | 2,080 lf | $2,075 | $924 | $2,998 |
| Ready-mix concrete, 3,500 psi, delivered | 24.31 yd3 | $4,228 | $540 | $4,768 |
| Place, screed and broom finish | 1,500 sqft | $75 | $1,943 | $2,018 |
| Sawn control joints | 190 lf | $285 | $141 | $426 |
| Subtotal × overhead and profit (20%) = midpoint | $17,069 | |||
National prices until you enter a ZIP.
Got a quote? Check it
Compare a contractor's price with the range for these inputs.
What next
Get two or three quotes and compare them with $12,802 – $21,336. DIY: 1,146 bags or 24.31 yd³ of ready-mix.
Tell me when local quotes openQuote matching is not live yet; we may earn a fee later.
Turn this price into an estimate for your customer →Cost by thickness for 30x50 (1,500 sq ft)
4 in · patios, sheds
$12,004 – $20,006
18.52 yd³ · 917 bags · about $16,005
5 in · garages, driveways
$12,802 – $21,336
23.15 yd³ · 1,146 bags · about $17,069
6 in · shops, RV pads
$13,559 – $22,598
27.78 yd³ · 1,376 bags · about $18,079
- Typical use
- A large shop or a barndominium.
- Thickness
- 5 inches with rebar; 6 inches where heavy equipment or a lift will stand.
- Planning note
- Decide the door openings first, because the edge and apron detail changes at each overhead door.
How much does a 30x50 concrete slab cost?
The range covers a 5-inch slab with 2,080 linear ft of rebar on 25.9 tons of gravel, formed along 160 linear ft. It's priced thicker than smaller sizes because a building this size usually holds equipment.
30x50 slab for a shop or barndominium
At 1,500 square feet it fits a shop with a bay for a truck or a small barndominium. A living space on the slab also needs a vapor barrier and under-slab plumbing, which you can add in the calculator.
Concrete delivery for 1,500 sq ft
The order is 24.31 yd³ on 3 trucks. Crews often pour a slab this size in two halves with a construction joint.
A range, not a contract
It's an estimate for budgeting and for checking quotes. The written bid a contractor gives after a site visit is what counts.
DIY vs pro for this 30x50 pour
Materials alone come to $9,851, about 58% of the $17,069 midpoint contractor price. The difference is $7,218 of labor, equipment, delivery and contractor overhead across 8 line items. At 24.31 yd³ with waste the pour fills 3 mixer trucks, so ready-mix is the practical route even for a DIY pour.
Other popular slab sizes
- 20x30 concrete slab cost$4,983 – $8,306600 sq ft · 7.41 yd³ at 4 in
- 20x40 concrete slab cost$6,562 – $10,936800 sq ft · 9.88 yd³ at 4 in
- 30x30 concrete slab cost$7,324 – $12,206900 sq ft · 11.11 yd³ at 4 in
- 30x40 concrete slab cost$9,664 – $16,1061,200 sq ft · 14.81 yd³ at 4 in
- 40x40 concrete slab cost$12,766 – $21,2761,600 sq ft · 19.75 yd³ at 4 in
- 40x60 concrete slab cost$18,970 – $31,6172,400 sq ft · 29.63 yd³ at 4 in
Compare with the next sizes
Garage concrete slab cost calculatorAll slab sizes and the full calculator
Frequently asked questions
How much concrete for a 30x50 slab?
23.15 yd³ at 5 inches before waste, and 24.31 yd³ as ordered.
Can a 30x50 slab be poured in one day?
Often yes with a big enough crew and steady trucks. Some contractors split it into two pours to control finishing.
What's the cost per square foot for a 30x50 slab?
$8.53 – $14.22 installed at national prices. Enter a ZIP for local labor.
Does a 30x50 slab need footings?
If a building sits on it, yes. The foundation calculator adds footings and a thickened edge.
For contractors
Quoting concrete for customers?
The free estimating app opens with a sample concrete job priced the same way. Read more about concrete estimating software.