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2026 cost data

Insulation Cost in New Hampshire (2026)

Insulation in New Hampshire costs above the national average — ranked 40 of 51 for installed price. New Hampshire sits in climate zone 6, so attics should hit R-60.

Insulation prices per square foot

Installed prices — material plus labor — adjusted for New Hampshire labor rates.

Job typeInstalled cost / sq ft1,500 sq ft attic
Attic blown-in fiberglass (R-49)$2.07$3,108
Attic blown-in cellulose (R-49)$1.90$2,856
Attic fiberglass batts (R-38)$1.79$2,688
Wall batts, open framing (R-15)$1.96$2,940
Wall dense-pack retrofit (drill & fill)$2.91$4,368
Crawlspace floor or wall insulation$2.35$3,528
Basement rigid foam + framing$3.47$5,208
Open-cell spray foam (3.5")$2.18$3,276
Closed-cell spray foam (2")$4.03$6,048
Old insulation removal & disposal$1.74$2,604

What whole jobs cost

Typical projectLocal price range
Attic top-up (1,500 sq ft)$1,680 – $2,912
Full attic removal + re-insulate$3,584 – $6,048
Whole-house wall retrofit (2,000 sq ft home)$4,704 – $8,736
Crawlspace encapsulation + insulation$4,256 – $10,080
Garage conversion insulation$1,008 – $2,464
Whole-home spray foam (new build)$8,400 – $17,920

Climate zone 6 R-value targets

Department of Energy retrofit recommendations for this zone.

Attic
R-60
Walls
R-21
Floors
R-30
Check your current R-value →

Price your own job

These tables are averages. Punch in your real measurements for a number you can compare against a bid.

Insulation costAtticBlown-in bagsProject total

Insulation cost FAQs for New Hampshire

How much does attic insulation cost in New Hampshire?

A 1,500 sq ft attic blown to R-49 runs about $2,642 to $3,730 installed in New Hampshire, or roughly $2.07 per square foot. DIY with rented equipment cuts that by 45–60%.

Is insulation cheaper to DIY in New Hampshire?

Yes. Labor is most of an insulation bid, so blowing your own attic or installing batts typically saves 45–60% of the installed price. Spray foam, dense-pack wall retrofits and removal jobs are worth hiring out.

What drives insulation prices in New Hampshire?

Local labor rates, how far crews travel, attic access, whether old insulation has to be removed first, and the R-value your climate zone calls for. Material prices barely change between states — labor is the swing factor.

Are there rebates in New Hampshire?

The federal 25C tax credit covers 30% of insulation and air-sealing material costs up to $1,200 per year, and most utilities add their own attic and air-sealing rebates. Always check with your utility before booking work.

Materials for an insulation job in New Hampshire

Fiberglass Insulation Rolls R13Browse current prices and top-rated options on Amazon

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