30x40 Metal Building with Concrete Slab Cost in Texas (2026)

STRUCTURAL CONCRETE & STEEL INCLUSIONS

What Is Included in Package SKU NTX-3040 (30' x 40' x 12')

1,200 sq ft (30 ft wide x 40 ft long) engineered monolithic concrete slab with 140 LF perimeter grade beam and interior stiffener beam
~22 cubic yards (89,100 lbs / 44.55 tons) of 3,000 to 3,500 PSI ready-mix concrete delivered in 3 full mixer loads (990 x 80-lb bag equivalent)
1,620 linear feet of deformed Grade 60 steel rebar tied on rigid chairs plus 10-mil Class A under-slab vapor retarder
Precision laser-set J-bolts or weld plates across 6 structural column reactions (two 20-ft structural bays)
Turnkey building includes 12 ft eave height, clear-span rigid rafters or pipe trusses, 26-gauge PBR roof/wall panels, two 10x10 roll-up door openings, and one 3070 walk door
1.5" x 1.5" formed concrete sheeting notch around full 140 LF perimeter to block wind-driven rain and rodents

IDEAL APPLICATIONS & COMPARE FOOTPRINTS

Best Uses for a 30x40 (1,200 Sq Ft) Footprint in North Texas

#1 searched residential workshop and 3-bay garage footprint across Parker, Hood, Erath, and Wise Counties
2-post automotive lift bay (when selected with the 5-inch 3,500 PSI Heavy Shop slab spec)
Turnkey foundation and erection package for 30x40 Mueller, Prime Metal, Brazos, and JAG standard series kits
Boat, bass rig, tractor, and side-by-side storage shop on 1 to 10 acre rural properties

Compare Other Exact-Size Building & Slab Packages:

24' x 30' x 10' (720 sf) Slab: $6,800 - $8,400 | Turnkey: $26,500 - $34,800 30' x 50' x 14' (1,500 sf) Slab: $15,800 - $20,600 | Turnkey: $54,000 - $72,500 40' x 60' x 14' (2,400 sf) Slab: $24,500 - $31,800 | Turnkey: $84,500 - $114,000 50' x 80' x 16' (4,000 sf) Slab: $42,000 - $56,000 | Turnkey: $142,000 - $189,000 60' x 100' x 16' (6,000 sf) Slab: $64,000 - $86,000 | Turnkey: $215,000 - $285,000

COMPLETE 14-POINT STRUCTURAL SPECIFICATION SHEET

30' x 40' x 12' Engineering, Concrete Volume & Framing Specifications (NTX-3040)

Every 30x40 foundation and building package is engineered for Western Cross Timbers soil conditions (Parker, Hood, Erath, Wise, Palo Pinto, Somervell, and Jack Counties).

Structural Parameter	SKU NTX-3040 (30' x 40' x 12') Specification	Engineering Standard / Field Tolerance
1. Building & Slab Footprint	30' Width x 40' Length (1,200 Sq Ft)	Laser transit squared to within +/- 1/8" diagonal tolerance
2. Eave Height & Overhead Door Clearance	12' Standard Eave Height (Customizable 10' - 20')	Supports overhead sectional or commercial drum roll-up doors
3. Concrete Slab Thickness & Mix Design	4" Reinforced Deck \| 3,000 - 3,500 PSI Ready-Mix Concrete	ASTM C94 batch-plant ticketed; 90-minute maximum drum discharge
4. Ready-Mix Concrete Volume (Incl. Beams)	~22 Cubic Yards (594 Cu Ft / 3 Mixer Trucks)	Includes +8% trench and subgrade variance allowance
5. Total Concrete Mass & Pre-Mix Bag Equivalent	89,100 lbs (44.55 Short Tons)	Equivalent to 990 x 80-lb bags or 1,320 x 60-lb bags
6. Perimeter & Interior Grade Beam Schedule	12" x 18" to 12" x 24" Perimeter Beam (140 LF) + Center Stiffener Beam	Excavated into undisturbed subgrade or compacted select-fill pad
7. Steel Rebar Reinforcement Schedule	#3 Rebar @ 18" OC or #4 Rebar @ 12" OC on Rigid Chairs (~1,620 LF total)	ASTM A615 Grade 60 deformed steel bars elevated on rigid chairs
8. Under-Slab Moisture & Vapor Retarder	10-Mil Class A Polyolefin Vapor Barrier	ASTM E1745 Class A; lapped 6" and taped at all utility penetrations
9. Column Anchor-Bolt & Baseplate Schedule	6 Structural Columns (24 Anchor Bolts / Weld Plates)	Matched to Mueller, Prime Metal, Brazos, JAG, or custom reaction plans
10. Perimeter Sheeting Notch (Rat Guard)	1.5" Wide x 1.5" Deep Formed Exterior Concrete Ledge	Full 140 LF perimeter weather & rodent barrier
11. Select-Fill Pad Compaction Specification	TxDOT Item 132 Low-PI Select Fill (PI 8 - 18) in 6" Lifts	Compacted to 95% Standard Proctor density; +5' perimeter apron
12. Structural Wind & Roof Live Load Rating	140 MPH IBC / ASCE 7-22 \| 20 PSF Roof Live Load	Engineered for North Texas severe thunderstorm & straight-line winds
13. Roof & Wall Cladding Profile	26-Gauge High-Tensile PBR (R-Panel) w/ 40-Yr Siliconized Polyester	80,000 PSI minimum yield strength; full die-formed ridge & base trim
14. 2026 Itemized Price Benchmarks (30x40)	Slab Only: $10,800 - $15,200 \| Turnkey: $41,500 - $56,800	Direct multi-trade dispatch across Parker, Hood, Erath, Wise & Palo Pinto

MUELLER, PRIME METAL, BRAZOS & JAG METALS COMPATIBILITY

Already Bought a 30x40 Building Kit? We Pour the Anchor-Bolt Slab & Erect It

Regional steel manufacturers supply the steel package and Anchor-Bolt Setting Plan but do not pour concrete or erect the shell. Our Scope 3 package ($23,500 - $32,400) handles your pad grading, anchor-bolt matched foundation, and full erection.

Regional Steel Kit Supplier	Nearest Western Cross Timbers Branch	30x40 Anchor System We Install	30x40 Slab + Pad + Erection Range
Mueller, Inc.	Aledo (I-20) & Glen Rose (Hwy 67)	Precision J-Bolt Cage Templates (6 Columns / 24 Bolts)	$23,500 - $32,400
Prime Metal Buildings & Components	Weatherford (I-20), Stephenville, Dublin HQ & Bridgeport	Bolt-Up PEMB J-Bolts or Embedded 6"x6" / 8"x8" Weld Plates	$23,500 - $32,400
Brazos Metal Building Systems	Granbury / Tolar (Hwy 377)	Rigid-Frame Red-Iron J-Bolt Templates w/ Hairpin Rebar	$23,500 - $32,400
JAG Metals LLC	Weatherford & Springtown (Hwy 199)	Weld-Plate or Bolt-Up Baseplate Anchor Layout + Rat-Guard Ledge	$23,500 - $32,400

FREQUENTLY ASKED QUESTIONS (NTX-3040)

30' x 40' x 12' Concrete Slab & Metal Building Questions Answered

How much does a 30x40 metal building with a concrete slab cost in Texas in 2026?

In Parker, Hood, Wise, and Erath Counties, a complete turnkey 30x40x12 metal building with an engineered monolithic concrete slab and compacted select-fill pad ranges from $41,500 to $56,800 ($34.58 - $47.33/sq ft) depending on whether you select a 4-inch standard or 5-inch heavy shop slab and tubular vs. red-iron framing. If you only need the 30x40 monolithic concrete slab on a pad-ready site, the cost is $10,800 to $15,200.

How many yards of concrete and how many mixer trucks does a 30x40 slab take?

A 30x40 monolithic slab (1,200 sq ft) with a 140 LF perimeter grade beam and one interior cross beam requires approximately 21 to 24 cubic yards of ready-mix concrete (3 full mixer trucks). By weight, that is roughly 89,100 lbs (44.5 tons) of concrete, or 990 individual 80-lb bags.

Should I choose the 4-inch standard slab or 5-inch heavy shop slab for a 30x40 building?

Choose the 4-inch standard slab (3,000 PSI, #3 rebar @ 18" OC, $10,800 - $12,600) for general vehicle parking, woodworking, and light storage. Upgrade to the 5-inch heavy shop slab (3,500 PSI, #4 rebar @ 12" OC, 12"x24" grade beam, $12,600 - $15,200) if you plan to bolt down a 2-post car lift, park a heavy diesel tractor, or drive a loaded equipment trailer inside.

Why is a 1.5-inch concrete sheeting notch (rat guard) important on a 30x40 metal shop?

A 1.5" x 1.5" perimeter notch formed into the outer top edge of the slab allows the exterior 26-gauge PBR wall sheeting to drop below the top surface of the concrete floor. That mechanical ledge stops wind-driven Texas rain from wicking under the base trim and blocks mice, snakes, and scorpions from entering the shop.

APPLES-TO-APPLES CONTRACTOR SPEC SHEET

Spec-First North Texas Construction vs. Typical Corner-Cutting

Why do so many cheap "concrete included" shop pads crack down the middle after one dry Texas summer on Parker or Hood County clay? Compare every structural layer before you sign a contract.

Structural Layer / Spec	✓ AM Concrete & Metal Building Standard	✗ Typical Corner-Cutting / Tailgate Quote
1. Pad Subgrade & Clay Remediation	Strip 4"-6" of organic grass/roots; import TxDOT Item 132 low-PI select fill compacted in 6" lifts with a +5 ft perimeter apron outside the slab.	Scrape grass with a skid-steer bucket and pour directly on active expansive black clay or uncompacted sugar sand that washes out in the first thunderstorm.
2. Actual Slab Depth & Perimeter Grade Beam	True 4", 5", or 6" center deck poured monolithically with a trenched 12"x18" to 16"x28" perimeter & cross grade beam using 2x8 or 2x12 outer forms.	Formed with nominal 2x4 lumber (which only measures 3.5" thick) and a shallow 6" scratched edge that snaps under vehicle tires or column uplift.
3. Steel Reinforcement & Support Chairs	#3 or #4 deformed steel rebar tied on 12" or 18" centers + 4-bar continuous beam cages, elevated on 2" support chairs in the structural center of the slab.	Thin 6x6 10-gauge rolled wire mesh or unchaired rebar laid flat on the dirt, which gets walked into the bottom mud during the pour and provides zero tensile strength.
4. Ready-Mix PSI, Slump & Vapor Barrier	3,000 to 4,000 PSI batch-ticketed ready-mix from plants like Martin Marietta, poured over a lapped 10-mil polyethylene vapor barrier to stop slab sweating.	2,500 PSI residential flatwork mix watered down at the chute so it rakes faster, with no vapor barrier, causing surface dusting, shrinkage cracks, and tool rust.
5. Anchor-Bolt Layout & Notch Ledge	J-bolts and weld plates set in rigid templates from your Mueller, Prime, or Brazos prints with a rotary laser, plus a 1.5"x1.5" perimeter water-stop ledge.	"Wet-setting" J-bolts by eye into setting concrete, forcing the steel crew to torch out baseplates or drill weak wedge anchors near the slab edge.
6. Steel Framing & Sheet Metal Gauge	Heavy weld-up red-iron / pipe or bolt-up I-beam framing engineered for 115 mph Exposure C wind, clad in 26-gauge high-rib PBR panels that overlap 1.25".	Light 14-gauge slip-fit carport tubing anchored with dirt augers, covered in thin 29-gauge residential R-panel that oil-cans in the sun and leaks at the base rail.
7. Itemized Pricing vs. Hidden Markups	Transparent line-item estimate separating pad grading, concrete slab ($8.25-$13.75/sf), kit erection, and steel shell so you see every dollar before we mobilize.	Either a vague 1-line cash quote with surprise rock/dirt add-ons on pour day, or a national building dealer marking up subcontracted 40x60 concrete to $12.95+/sq ft ($31,080+).

Already Have a Quote From Another Concrete Crew or Metal Building Dealer? Run the exact same dimensions in our calculator above to see the true line-item cost for select-fill pad work, 3,500 PSI #4 rebar concrete, and steel erection.

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NORTH TEXAS LANDOWNER & RANCHER FEEDBACK

What Property Owners Across Parker, Hood, Erath & Wise County Say

When you are putting $20,000 to $95,000 into a permanent shop slab and steel building on your land, three things matter: straight numbers up front, anchor bolts that match the drawings, and a crew that shows up when they say they will.

★★★★★ 30'x50' Mueller Kit + 5" Slab

"Every Single Anchor Bolt Hit Dead-Center on Our Mueller Columns"

"We ordered a 30x50x14 bolt-up kit from Mueller down in Glen Rose, and three local concrete guys wouldn't even look at the anchor-bolt reaction sheet. These guys came out off US-377 in Acton, built a 14-inch compacted select-fill pad, chaired #4 rebar on 12-inch centers, and set every J-bolt in wood templates with a laser. When the erection crew stood the red iron two weeks later, not one baseplate had to be slotted with a torch."

Mark & Shelley D. Acton / Granbury, TX (Hood County - 76049)

★★★★★ 40'x60'x14' Turnkey Weld-Up Shop

"Saved Over $6,400 on the Concrete Alone Compared to a Turnkey Dealer Quote"

"I got a quote from a big metal building outfit on FM 920 that wanted $31,080 just for the 40x60 concrete add-on. I plugged 40x60 into this estimator, got a line-item breakdown right on my phone, and had the crew out to our 6 acres north of Weatherford 48 hours later. We got a full 5-inch 3,500 PSI slab with 12x24 perimeter beams, a center cross beam for my 2-post lift, and a weld-up 26-gauge shop for thousands less."

Clint H. Weatherford / Peaster, TX (Parker County - 76088)

★★★★★ 50'x80' Ag Barn Slab & Pad Grading

"Built Our Pad Right Through a 20-Inch Slope and Checked Our Septic Setbacks"

"Our ranch tract off Hwy 281 outside Stephenville had almost two feet of fall across the barn site and an aerobic septic spray field nearby. The crew flagged our OSSF setbacks before stripping a single bucket of dirt, hauled in 14 belly-dump loads of red select fill, compacted it in lifts, and poured 94 yards of 4,000 PSI concrete in one morning with six mixer trucks. Zero puddles and zero hairline cracks."

Wayne & Brett K. Stephenville / Morgan Mill, TX (Erath County - 76401)

★★★★★ 30'x40' Prime Metal Kit + Slab

"Real #4 Rebar on Chairs and a Mirror-Slick Power-Trowel Finish"

"I've watched neighbors out here between Decatur and Bridgeport get burned by concrete crews who lay wire mesh on the dirt and pour 3.5-inch pads that crack before the building is even up. Before the trucks rolled in from the batch plant, I walked the forms with the foreman: 2x12 perimeter beam forms, 10-mil poly taped at the seams, #4 bar on 2-inch chairs, and a 1.5-inch tin ledge all the way around. First-class work."

Darren M. Decatur / Bridgeport, TX (Wise County - 76234)

1. Ready-Mix Concrete Volume (+8% Allowance):	~31 Cubic Yards (837 Cu Ft)
2. Batch-Plant Mixer Truck Loads (9-Yd Drums):	4 Full Mixer Trucks
3. Total Concrete Mass & Pre-Mix Bag Equivalent:	62.8 Tons (1,395 x 80-lb / 1,860 x 60-lb Bags)
4. Deformed Grade 60 Rebar & Support Chairs:	~2,850 LF (143 x 20' Bars) + 380 Chairs
5. Perimeter & Cross Stiffener Grade Beams:	160 LF Perimeter + Cross Beams
6. Under-Slab Vapor Barrier & Column Bolts:	1,680 Sq Ft 10-Mil Poly \| 8 Cols (32 J-Bolts)

Multi-Provider 3-Stage Trade Stack (Order All 3 or Any Individual Stage)

30' x 40' x 12' Metal Building & Monolithic Concrete Slab Package (1,200 Sq Ft)

What Is Included in Package SKU NTX-3040 (30' x 40' x 12')

Best Uses for a 30x40 (1,200 Sq Ft) Footprint in North Texas

Compare Other Exact-Size Building & Slab Packages:

30' x 40' x 12' Engineering, Concrete Volume & Framing Specifications (NTX-3040)

Already Bought a 30x40 Building Kit? We Pour the Anchor-Bolt Slab & Erect It

30' x 40' x 12' Concrete Slab & Metal Building Questions Answered

How We Take Your Shop From Raw Texas Dirt to Bolted Steel

Laser Pad & Select-Fill Base

12"x24" Beams, Rebar & J-Bolts

Monolithic Ready-Mix Pour

Steel Erection & Walkthrough