How Much Does a 30x50 Concrete Slab Cost in Tennessee?
A 30x50 concrete slab — 1,500 square feet — is a size we pour frequently for pole barns, 3-car garages, and mid-size shop buildings in Lawrence and Giles County. It sits between the common 30x40 and 40x60 building sizes and is often the right fit for a property that needs more than a 30x40 but can't justify the step up to 40x60. Here's what it costs in this market in 2025.
A building slab in Lawrence County — rebar grid, vapor barrier, and electrical conduit stub-outs placed before the pour.
Quick answer: 30x50 concrete slab cost in Middle Tennessee
A 30x50 concrete slab (1,500 sq ft) in Lawrence or Giles County runs $12,500 to $19,000 installed for a 4-inch slab with wire mesh. A 5-inch slab with rebar for vehicle or equipment use runs $16,000 to $23,000. Site conditions and base depth required determine where on that range you land. An on-site estimate is needed for an accurate number.
How a 30x50 slab compares to other common sizes
For context: a 30x40 slab (1,200 sq ft) runs $10,000–$16,000. A 40x60 slab (2,400 sq ft) runs $19,000–$28,000. A 30x50 at 1,500 sq ft slots right between those, and the per-square-foot cost is similar to both — concrete pricing scales fairly linearly with area when site conditions are comparable.
The 30x50 footprint makes sense when: a 3-car garage is the goal (30 feet accommodates three 10-foot bays), or when the building needs a dedicated workshop area separate from vehicle storage, or when a 40x60 is more building than the property needs but the extra 300 sq ft over a 30x40 would be put to work.
| Scope | Lawrence / Giles County estimate |
|---|---|
| 30x50 slab, 4 in, wire mesh, stable site | $12,500 – $17,000 |
| 30x50 slab, 4 in, wire mesh, clay subgrade | $14,500 – $20,000 |
| 30x50 slab, 5 in, rebar, vehicle/equipment use | $17,000 – $24,000 |
| 30x50 slab, 6 in, rebar, heavy equipment | $20,000 – $28,000 |
What we always include on a building slab this size
On every building slab at ACS, we stub out electrical conduit during the pour — before any concrete is placed. On a 30x50 building slab, we position conduit stubs at the intended panel wall location and run them to the concrete surface for connection by the electrician later. This is a $150–$250 step that eliminates the need to core drill through a finished slab — which costs more and creates an imperfect patch. It's a small detail that every concrete contractor should do on a building slab and that not all of them do.
Frequently asked questions
How much does a 30x50 concrete slab cost in Tennessee?
$12,500–$19,000 for 4-inch with wire mesh in Lawrence and Giles County. $16,000–$23,000 for 5-inch with rebar for vehicle use. These are 2025 local numbers — not national averages. On-site evaluation required for accuracy.
What is a 30x50 slab used for?
3-car garages, mid-size pole barns, large workshops, and equipment storage buildings on small farms. 1,500 sq ft is the practical floor space for three 10-foot bays plus a shop area or storage zone behind.
How many yards of concrete does a 30x50 slab take?
At 4 inches: approximately 21 yards ordered. At 5 inches: approximately 26 yards. Typically a 2–3 truck delivery on the pour day, with a pump truck if site access is limited.
How does a 30x50 slab compare in price to a 30x40 or 40x60?
A 30x40 runs $10,000–$16,000. A 30x50 runs $12,500–$19,000. A 40x60 runs $19,000–$28,000. The price scales roughly linearly with square footage when site conditions are comparable.
Should a 30x50 building slab be poured before or after the building?
For post-frame buildings, the slab is often poured after the posts and roof are in place — this allows pouring under cover, which is valuable in Tennessee. Concrete truck access through the overhead door opening is the key constraint we evaluate during planning.
Ready for a free estimate on a 30x50 slab in Lawrenceburg, Pulaski, or Middle Tennessee? Call (931) 369-2134 or request a quote online. See our concrete services page, our 30x40 slab cost guide, and our 40x60 slab guide.