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30×40 Concrete Slab Cost in Gadsden, AL (2026)

A 30×40 concrete slab in Gadsden, AL costs about $10,316 turnkey in 2026 ($8.60 per sq. ft.). Here's the itemized breakdown of materials, site prep and labor, using local crew rates.

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Concrete & Rebar Materials
$3,728
Ready-mix concrete, rebar, forms & vapor barrier
= Rows 3–6 below, materials only
Excavation & Gravel Base
$2,275
Grading, haul-off & compacted stone base
= Rows 1–2 below, installed price
Turnkey Installed Total
$10,316
$8.60 per sq. ft.
Formed, poured & finished by a local concrete crew
= All rows below, installed price

Prices updated Oct 2026

A fair bid from a local builder in Gadsden, AL should land between $8,769 and $12,379, about 15% below to 20% above this estimate. Quotes for the same building can vary widely, so get 3 quotes on the same spec. If one is outside this range, ask what it includes or leaves out.

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Itemized cost breakdown

#ItemQuantityMaterialsLaborInstalled
1Excavation & gradingStrip topsoil, cut/fill to grade, haul-off1,480 sq ft$478$507$1,182
2Compacted gravel base (4")Crushed stone, plate-compacted20.7 tons$573$338$1,093
34" ready-mix concrete (3,500 PSI)Includes 5% waste and thickened edges19.2 cu yd$2,234$0$2,681
4#4 rebar grid (18" on center) & chairsTied rebar on chairs, dowels at doors1,760 lf$894$575$1,763
5Forms, pour & finish laborSet forms, place, power-trowel finish, cure1,200 sq ft$323$1,694$2,420
6Vapor barrier & control jointsDetails in the spec sheet🔒 Included in $19 spec sheet——🔒
7Concrete pump (trailer-mounted)Details in the spec sheet🔒 Included in $19 spec sheet——🔒
8Permit & inspection (if required)Details in the spec sheet🔒 Included in $19 spec sheet——🔒
Turnkey total$5,248$3,383$10,316
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Prices use 2026 material costs and typical local crew rates. Site work, custom options and material price swings can move your final price.

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A sheet for comparing 3 builder bids line by line, and a builder-ready spec so every builder prices the same building. Plus the same line items as this page in an editable Excel file and a PDF (spec, quantity, materials, labor and installed price) and a permit and site-prep checklist. 30-day money-back.

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Common questions

How much does a 30×40 Concrete Slab cost in Gadsden, AL?

About $10,316 fully built by a local crew in 2026, or roughly $3,728 for the materials kit alone. Most fair bids land between $8,769 and $12,379.

What drives the price up or down?

Site prep (slope, soil, driveway access), floor choice, doors and insulation, and local labor rates. Lumber and steel prices also move a few percent a year.

Do I need a permit?

Permit requirements vary by county and city. Many unincorporated areas of Alabama don't enforce a building code, while cities and some counties do. Check with your county or city building office before you build.

How do I make sure I'm getting a fair quote?

Get at least 3 itemized bids for the same spec. Compare them line by line against this breakdown and ask about anything far above or below it.

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