Deck Building Cost in Connecticut (2026)
Deck Building in Connecticut runs about 16% above the national average. A typical 320 sq ft project starts around $5,570–$9,280 for pressure-treated wood. Estimate your exact project below.
Deck Building Cost Calculator
Adjust the details for an installed-cost range tailored to you.
Length × width of the deck surface. A 16×20 deck is 320 sq ft.
Ballpark estimate for planning — not a quote.
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Deck Building cost in Connecticut by material
Installed cost for a typical 320 sq ft project in Connecticut.
| Material | Per sq ft | Typical CT project |
|---|---|---|
| Pressure-treated wood | $17.4–$29.0 | $5,570 – $9,280 |
| Cedar / redwood | $29.0–$46.4 | $9,280 – $14,850 |
| Composite (Trex-style) | $34.8–$69.6 | $11,140 – $22,270 |
What affects your Connecticut cost
- Decking material and railing style
- Height off the ground and stairs
- Footings, framing and permits
- Built-ins (benches, pergola, lighting)
- Local labor rates
Connecticut deck building — FAQ
How much does deck building cost in Connecticut?
In Connecticut, a typical 320 sq ft deck building project runs about $5,570–$9,280 for pressure-treated wood, installed. That's about 16% above the national average. Higher-end materials cost more — use the calculator above for your exact size and material.
How much does deck building cost per sq ft in Connecticut?
In Connecticut, installed deck runs about $17.4–$69.6 per sq ft depending on material (pressure-treated wood $17.4–$29.0, cedar / redwood $29.0–$46.4, composite (trex-style) $34.8–$69.6). That's about 16% above the national average.
How much does it cost to build a deck in 2026?
A typical 320 sq ft deck runs about $5,000–$8,000 in pressure-treated wood, or $10,000–$19,000 in composite, installed. Size, height, railings and material drive the price — use the calculator for a localized estimate.
Is composite decking worth it?
Composite costs roughly 1.5–2× wood up front but eliminates staining/sealing and lasts 25–30+ years, so total cost of ownership is often lower. It's the popular choice for homeowners who don't want annual maintenance.