Decks and Porches Cost in Portsmouth, NH in 2026
Most Decks and Porches projects in Portsmouth, NH cost between $7,500 and $26,000. The typical price is $13,500.
Portsmouth prices track the national average closely. Costs here are close enough to the national picture that the adjustment barely moves the number.
What drives the price
- Pressure-treated pine versus composite versus hardwood
- Height off the ground and stair count
- Railing material
- Footing depth required by frost line
Usually included
- Footings, framing and decking
- Railings and stairs
- Fasteners and flashing at the ledger
Usually extra
- Permits
- Under-deck drainage
- Built-in seating or pergola
Unit prices in Portsmouth, NH
| Quality tier | Cost per sq ft |
|---|---|
| Budget | $25 |
| Mid-range | $45 |
| High-end | $86 |
Deck builders in Portsmouth, NH
Businesses listed on Google near Portsmouth, NH. We are not affiliated with them and do not vet them — always confirm licensing and insurance before hiring.
Premier Deck
4.8(72 reviews)
7 Spaulding Ave, Rochester, NH 03868
JC Construction
5.0(32 reviews)
10 Dodge Rd, Hampton Falls, NH 03844
River Birch Builders
5.0(29 reviews)
1039 Islington St Ste 11, Portsmouth, NH 03801
DeckPros LLC
4.9(29 reviews)
406 Collettes Grove Rd, Derry, NH 03038
Pafford Construction LLC
5.0(23 reviews)
31 Bunker Hill Ave, Stratham, NH 03885
Allan Trant's Exterior Finish Work
5.0(18 reviews)
20 Gravel Pit Rd, Nottingham, NH 03290