Insulation Cost in Dover, NH in 2026
Most Insulation projects in Dover, NH cost between $1,500 and $6,000. The typical price is $2,900.
Labour and materials in Dover run about 3% above the national average. These figures are adjusted for that, so they are not the national average you will find elsewhere.
What drives the price
- Batt, blown-in cellulose or closed-cell spray foam
- Target R-value for your climate zone
- Attic, wall or crawlspace access
- Air sealing done alongside the insulation
Usually included
- Insulation material to the specified R-value
- Installation and air sealing at obvious gaps
- Cleanup and disposal
Usually extra
- Removing contaminated existing insulation
- Ventilation or moisture remediation
- Drywall work for wall injection
Unit prices in Dover, NH
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $1.22 |
| Mid-range | $2.45 |
| High-end | $5.10 |
Insulation contractors in Dover, NH
Businesses listed on Google near Dover, NH. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Valley Insulation LLC
4.9(65 reviews)
141 Hobbs St, Conway, NH 03818
Spray Foam Insulators By Luke Whitcomb
5.0(37 reviews)
90 Suncook Vly Hwy, Chichester, NH 03258
AJ Pro Green Insulation Corp
4.9(24 reviews)
19 Shore Dr, Hampstead, NH 03841
Premier Attic Insulation
5.0(16 reviews)
30 Third St, Dover, NH 03820
Seacoast Renovation and Insulation
5.0(15 reviews)
Goodwin Rd, Rollinsford, NH 03869
Priority Insulation Services
4.8(16 reviews)
6 Atkinson St, Portsmouth, NH 03801