Ballpark 2026 prices for new decks, replacements, and add-ons in Litchfield County, and what moves a price up or down. Your written estimate is the real number, but this should help you budget before you call.
Price per square foot
These ranges are for a complete deck: footings, pressure-treated frame, decking, basic stairs, and a standard railing in the same material family.
| Decking | Per sq ft, installed | 12×12 (144 sq ft) | 12×16 (192 sq ft) | 16×20 (320 sq ft) |
|---|---|---|---|---|
| Pressure-treated pine | $35–55 | $5,000–7,900 | $6,700–10,600 | $11,200–17,600 |
| Cedar | $45–65 | $6,500–9,400 | $8,600–12,500 | $14,400–20,800 |
| Composite | $60–90 | $8,600–13,000 | $11,500–17,300 | $19,200–28,800 |
| PVC | $70–100 | $10,100–14,400 | $13,400–19,200 | $22,400–32,000 |
Smaller decks cost more per square foot, because footings, stairs, permits, and setup cost about the same no matter the size. Larger decks come in at the lower end per square foot.
What pushes the price up
Height. A ground-level deck is the cheapest to build. A second-story deck off a raised ranch or a walkout basement needs taller posts, more bracing, longer stairs, and more time on ladders and scaffolding. Expect 15 to 30 percent more.
Ledge and rock. Much of Litchfield County sits on shallow ledge and glacial stone. Footings that hit rock need to be pinned to it or moved, and that takes time. Some builders use helical piles, which are screwed into the ground with a machine instead of dug.
Slope. A steep yard means tall posts on one side and short on the other, with more cutting and fitting.
Shape. Angles, curves, multiple levels, picture-frame borders, and diagonal boards all add labor.
Railing. Aluminum, cable, and glass railing can add several thousand dollars on a medium deck. See railings and stairs.
Stairs. A wide staircase or one with a landing costs more than a single narrow run.
Tear-off. Removing and hauling away an old deck usually runs $1,500 to $4,000. See deck replacement.
House repairs. If the old ledger let water into the house rim joist, that wood has to be repaired before the new deck goes on.
What brings it down
- A simple rectangle at ground level or one story up.
- Pressure-treated boards with a wood railing.
- Building in the off-season, when some builders have more room in their schedules.
- Keeping a sound existing frame and resurfacing it.
Add-ons
| Item | Rough cost |
|---|---|
| Hidden fasteners (vs. face screws) | $2–4 per sq ft |
| Picture-frame border | $800–2,500 |
| Low-voltage LED lighting | $1,200–4,000 |
| Built-in bench | $100–250 per linear foot |
| Privacy screen or lattice skirting | $25–75 per linear foot |
| Pergola over the deck | $4,000–12,000 |
| Roof or screened porch | See covered decks and porches |
Permits and other fees
Most decks in Connecticut need a building permit. Each town sets its own fees, often based on the construction cost. On a typical deck the permit runs from about one hundred to a few hundred dollars. The builder usually pulls the permit and includes the fee in the estimate. Ask to be sure.
Lots near lakes, rivers, or wetlands may need an inland wetlands review, which can add time. Houses in a local historic district may need approval for work visible from the street.
Comparing estimates
When you get more than one price, make sure each one includes the same things:
- Footing depth and number of footings
- Lumber sizes and joist spacing
- Board brand and line
- Railing type and how posts are attached
- Stairs, landings, and the pad at the bottom
- Flashing and ledger fasteners, or a freestanding design
- Permit, inspections, demolition, and haul-away
- Payment schedule and start date
A lower price that leaves out flashing, uses shallower footings, or skips the permit isn’t a better deal. In Connecticut, home improvement contractors have to be registered with the Department of Consumer Protection, and contracts must be in writing. You can look up a registration at elicense.ct.gov.
Ready for a real number? New deck construction explains how the job works, or call for a free on-site estimate.
Common questions
What’s the cheapest way to build a deck?
A rectangular ground-level deck in pressure-treated pine with a wood railing and one set of short stairs.
Does a deck add value to my house?
Real estate cost-versus-value studies usually show a wood deck recovering a good share of its cost at sale, with composite recovering somewhat less. Most people build a deck to use it, and the resale value is a bonus.
How much does a deck cost per square foot in Connecticut?
Most complete decks in Litchfield County come in between $35 and $100 per square foot in 2026, depending mostly on the boards, the height, and the railing.
Why do estimates vary so much?
Different footing methods, lumber sizes, railings, and what’s included. Line them up item by item before you decide.
Tell us about your deck.
Size, what’s wrong with it now, or what you’d like to build. Photos help.