Real 2026 pricing for 24x24, 30x40, and 40x60 slabs across the Austin to San Antonio corridor — plus an honest breakdown of site prep, materials, and labor so you know exactly what you're paying for.
Quick Answer
In the Texas Hill Country, expect $7–$12 per square foot for a standard 4-inch residential slab and $9–$16 per square foot for a thickened-edge monolithic foundation with rebar. A typical 30x40 shop slab runs $11,000–$18,000 installed, and a 40x60 metal-building slab runs $22,000–$36,000.
Final pricing depends on site conditions (rock, slope, access), slab thickness, rebar schedule, and finish — covered in detail below.
Pricing by Size
Installed pricing for monolithic slabs in the Austin to San Antonio area, including standard site prep, 6-mil vapor barrier, rebar grid, 3,000+ PSI concrete, and finish.
| Slab Size | Area | Installed Cost | Typical Use |
|---|---|---|---|
| 24x24 | 576 sq ft | $6,000 – $9,500 | Detached garage, RV pad, small shop |
| 30x40 | 1,200 sq ft | $11,000 – $18,000 | Barndominium, mid-size shop, 3-car garage |
| 40x60 | 2,400 sq ft | $22,000 – $36,000 | Large metal building, commercial shop |
| 50x80 | 4,000 sq ft | $36,000 – $58,000 | Large warehouse, equipment storage |
Ranges reflect typical 2026 pricing in Travis, Williamson, Hays, Comal, and Bexar counties. Engineered foundations, post-tension, or unusually rocky sites can exceed these ranges.
Where Your Dollar Goes
Clearing, grading, fill, and compaction. Rocky Hill Country lots push this higher.
Setting forms square and level, including thickened-edge footings.
6-mil poly under conditioned slabs and compacted base rock.
#3 or #4 rebar grid tied and chaired off the base — never just wire mesh on the ground.
Ready-mix delivered. Long hauls into the Hill Country add delivery fees.
Pour, screed, float, and your chosen finish (broom, smooth, or stamped).
What Drives Cost
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City-by-City
Local site prep, soil, and batch-plant distance can swing slab pricing by 5–15% across the I-35 corridor. Here's what to expect in each market we pour.
Expansive clay soils in east and south Austin often need extra fill and a deeper rebar grid. City of Austin permits and inspections may apply to additions.
How much does a concrete slab cost in Austin, TX?
Most Austin slabs run $7–$12 per square foot installed, with thickened-edge monolithic foundations $9–$16 per square foot. Clay-soil fill and city permitting can add 5–10% versus rural Hill Country pours.
Williamson County sites are generally flatter with good truck access, which keeps site-prep labor predictable. Expect standard fill and compaction on most lots.
How much does a concrete slab cost in Round Rock, TX?
Round Rock slabs typically price in line with Austin — $7–$12 per square foot for residential 4-inch pours, with quick batch-plant access keeping delivery fees low.
Caliche and limestone are common north of Georgetown. Rock excavation can add labor; on the upside, a solid rock base usually means less imported fill.
How much does a concrete slab cost in Georgetown, TX?
Georgetown slabs run $7–$13 per square foot installed. Rock excavation on hilly lots can add to site prep but typically reduces fill and compaction costs.
Mixed terrain with limestone outcrops on the west side. Most pours are straightforward; sloped lots may need step-down footings or retaining work.
How much does a concrete slab cost in Cedar Park or Leander, TX?
Slabs in Cedar Park and Leander typically run $7–$13 per square foot. Sloped lots near 1431 and 183A may require step-down footings, which adds a small premium.
Rural Hill Country sites with longer ready-mix hauls. Solid limestone bases are common — great for stability, tougher on excavation equipment.
How much does a concrete slab cost in Dripping Springs or Wimberley, TX?
Expect $8–$14 per square foot installed in the western Hill Country. Longer ready-mix delivery and rock excavation drive the small premium over central Austin pricing.
Comal County mixes flat river-valley lots with steep Hill Country grades. Slab prep varies widely — flat lots price like San Antonio, hill lots like Wimberley.
How much does a concrete slab cost in New Braunfels, TX?
New Braunfels slabs typically run $7–$13 per square foot. Lots near the Guadalupe and Comal rivers are usually flat and prep quickly; hilltop lots near Canyon Lake cost a bit more.
Mature batch-plant network keeps delivery fees low. Expansive soils in some neighborhoods may require engineered footings or post-tension on larger slabs.
How much does a concrete slab cost in San Antonio, TX?
San Antonio slabs run $7–$12 per square foot for standard residential pours. Expansive-clay neighborhoods may need engineered foundations, which raise cost on larger homes.
FAQs
Most residential concrete slabs in the Austin to San Antonio area run $7–$12 per square foot for a standard 4-inch slab, and $9–$16 per square foot for thickened-edge monolithic foundations with rebar. Rocky Hill Country lots, long pumps, and remote sites push the high end.
A 24x24 (576 sq ft) monolithic slab typically runs $6,000–$9,500 installed in the Hill Country, including site prep, forms, 6-mil vapor barrier, rebar, 3,000+ PSI concrete, and a clean finish.
A 30x40 (1,200 sq ft) shop or barndominium slab is usually $11,000–$18,000 installed. Thickened edges, interior footings for posts, and additional rebar can move the number within that range.
A 40x60 (2,400 sq ft) metal-building or large shop slab generally runs $22,000–$36,000 installed in Central Texas, depending on engineering, thickness, and site conditions.
Caliche, limestone, and sloped lots add excavation, fill, and compaction time. Long concrete-truck distances from Austin or San Antonio batch plants also add delivery fees on remote pours.
Yes — every quote is itemized so you can see exactly what site prep, materials, reinforcement, and labor cost on your specific project. No pressure, no surprises.
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