Deck building cost in New Hampshire
What a new pressure-treated deck costs in New Hampshire, with ranges from the Atlas estimator and what changes the price.
Every number on this page comes from the Atlas Instant Ballpark, the same estimator you can use for your own home. These are example houses to show how the price behaves. They are not quotes, and your written estimate after a site visit is the number that counts.
Example ranges
| Example scope | Atlas ballpark range |
|---|---|
| Sixteen-by-twelve deck in pressure-treated lumber | $5,700 to $6,300 |
| Twenty-by-sixteen deck in pressure-treated lumber | $8,400 to $9,300 |
| Any deck with composite decking | Priced after a site visit |
We price composite decks after a site visit.
This is a ballpark, not a quote. It is not adjusted to your site until someone from Atlas sees it; final pricing comes after a site visit and a written estimate.
What changes the price
- Deck area. Framing, decking and footings scale with the size of the deck.
- Material. The ballpark covers pressure-treated lumber. Composite decking is priced after a site visit.
- Footings. Frost footings are included. Footings in ledge are priced after a site visit.
- Stairs and railings. A wood railing and one short set of steps are included; bigger stairs are extra.
Town permit fees are not in these ranges. Atlas is not a structural engineering firm. When a project needs an engineered design, a licensed structural engineer designs it and we build to that design.
Getting an accurate number
Measure the length and width of the deck you have in mind and how high the floor of the deck will be above the ground. Note whether it will attach to the house or stand on its own, where the stairs should land and whether the yard has ledge or a steep slope. Higher decks need taller posts, bracing and longer stairs, and ledge changes how footings are dug. If an old deck has to come off first, tell us its size.
Pressure-treated or composite
Pressure-treated decking costs less up front and can be stained. Composite decking costs more but does not need staining. The framing under both is pressure-treated lumber, so the structure is the same either way.
What the example price includes
Included
- Frost footings, pressure-treated framing and decking
- Wood railing with balusters at a typical height
- One short set of steps
Not included
- Stairs over a few steps
- Footings in ledge
- Town permit fees
Related pages
- Deck buildingHow we do the work.
- All cost guidesRanges for other projects.
- How we workFrom the first call to the start of work.
Common questions
Do I need a permit for a deck?
Usually, yes. We confirm what your town requires before work starts.
Can a deck be attached to my house?
Usually, with a properly fastened and flashed ledger. If the wall cannot carry it, the deck can be freestanding.