Additions and Remodels Cost in Rochester, NH in 2026
Most Additions and Remodels projects in Rochester, NH cost between $53,000 and $245,000. The typical price is $115,000.
Labour and materials in Rochester 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
- Whether the addition needs its own foundation and roof tie-in
- Adding a bathroom or kitchen (plumbing and electrical runs)
- Structural work to the existing wall being opened up
- Local permit and inspection requirements
Usually included
- Framing, roofing and siding to match
- Electrical rough-in and finish
- Insulation, drywall and paint
- Flooring and trim
Usually extra
- Permits and architectural drawings
- Site work or tree removal
- High-end fixtures and appliances
Unit prices in Rochester, NH
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $135 |
| Mid-range | $285 |
| High-end | $610 |
Home addition and remodeling contractors in Rochester, NH
Businesses listed on Google near Rochester, NH. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Long Home
4.8(228 reviews)
30 Centre Rd Ste 1002, Somersworth, NH 03878
Gardner Construction
5.0(34 reviews)
8 Church St, Rochester, NH 03839
Unified Builders Inc.
4.7(23 reviews)
688 Calef Hwy, Barrington, NH 03825
American Building & Design, LLC
5.0(12 reviews)
151 Wednesday Hill Rd, Lee, NH 03861
C. O'Neil Remodeling & Design
5.0(9 reviews)
106 Flowing Brook Rd, Farmington, NH 03835
J. Christopher Home Renovations
5.0(9 reviews)
High Rd, Lee, NH 03861