Free cost calculator

Home › Cost guides › New Hampshire › Concrete Slab & Flatwork

Concrete Slab & Flatwork Cost in New Hampshire (2026)

Typical price for a 30×40 (1,200 sq ft) 4-inch reinforced slab in New Hampshire: about $12,112 installed. Use the free itemized estimate below to check contractor quotes.

Request free local quotesCustomize this estimate
Concrete & Rebar Materials
$4,129
Ready-mix concrete, rebar, forms & vapor barrier
= Rows 3–6 below, materials only
Excavation & Gravel Base
$2,679
Grading, haul-off & compacted stone base
= Rows 1–2 below, installed price
Turnkey Installed Total
$12,112
Formed, poured & finished by a local concrete crew
= All rows below, installed price
A fair bid from a local builder in New Hampshire should land between $11,143 and $13,323. Get 3 quotes, and if one is far outside this range, ask why.

Estimate only. Actual prices vary. No guarantee or warranty. Use as a guide only. Read the full disclaimer

Itemized cost breakdown

#ItemQuantityMaterialsLaborInstalled
1Excavation & gradingStrip topsoil, cut/fill to grade, haul-off1,480 sq ft$530$641$1,405
2Compacted gravel base (4")Crushed stone, plate-compacted20.7 tons$635$427$1,274
34" ready-mix concrete (3,500 PSI)Includes 5% waste and thickened edges19.2 cu yd$2,474$0$2,969
4#4 rebar grid (18" on center) & chairsTied rebar on chairs, dowels at doors1,760 lf$990$728$2,062
5Forms, pour & finish laborSet forms, place, power-trowel finish, cure1,200 sq ft$358$2,143$3,001
6Vapor barrier & control jointsDetails in the spec sheet🔒 Included in $19 spec sheet$307$341$778
7Concrete pump (trailer-mounted)Details in the spec sheet🔒 Included in $19 spec sheet$294$0$353
8Permit & inspection (if required)Details in the spec sheet🔒 Included in $19 spec sheet$225$0$270
Turnkey total$5,813$4,280$12,112
Customize this estimate (free)Request free local quotes

Prices use 2026 material costs and typical local crew rates. Site work, custom options and material price swings can move your final price.

$19 one-time

Builder Spec Sheet & Shopping List

The same line items as this page in an editable Excel file and a PDF, each with a short spec, quantity, materials, labor and installed price. Plus a permit and site-prep checklist and a sheet for comparing 3 builder bids. 30-day money-back guarantee.

Get my spec pack
Free

Request free local quotes

Tell us your ZIP and timeline. We'll match your request with local builders who serve your area as they join our network. No cost, no obligation.

Request free quotes

Common questions

How much does concrete slab & flatwork cost in New Hampshire?

For a 30×40 (1,200 sq ft) 4-inch reinforced slab, expect about $12,112 with a local pro in 2026. Fair quotes usually fall between $11,143 and $13,323.

Is this a free estimate template?

Yes. The breakdown on this page is free. The $19 Spec Pack puts these same line items in an editable Excel file and a PDF spec sheet you can hand to contractors, plus a permit checklist and a bid-comparison sheet.

How do I compare contractor quotes?

Ask each contractor to price the same scope, then compare their numbers line by line against this breakdown. A quote far below the range often leaves something out.

Related cost guides