Deck Cost Calculator
Enter your deck's dimensions, pick a material and this calculator returns a realistic budget: decking, framing, fasteners and — if you're hiring it out — labor.
Result
- Deck area192sq ft
- Decking material864USD
- Framing lumber576USD
- Fasteners & hardware120USD
- Estimated total1560USD
- Cost per square foot8.13USD/sq ft
How it works
total = area × (decking $/sq ft + framing $/sq ft + labor $/sq ft) + fasteners
- Area = 16 × 12 = 192 sq ft
- Decking = 192 × $4.5 = $864
- Framing = 192 × $3 = $576
- Fasteners = $120
- Total = $1560 → $8.13/sq ft
How the deck cost calculator works
Deck cost has four moving parts: the deck boards you walk on, the framing underneath, the fasteners holding it together and — optionally — the labor to build it.
Decking dominates the budget for premium materials. A composite deck costs roughly 2.5× a pressure-treated deck per square foot, but pressure-treated needs periodic staining that composite never does.
Framing runs about $3 per square foot for a new substructure. Reusing a sound existing frame cuts that to zero and is the single biggest saving available.
Formula
total = area × (decking + framing + labor per sq ft) + fasteners
Worked example: 12 × 16 ft pressure-treated deck, DIY
- Area = 12 × 16 = 192 sq ft
- Decking = 192 × $4.50 = $864
- New framing = 192 × $3.00 = $576
- Fasteners and hardware = $120
- Total = $1,560 → $8.13 per square foot
Planning ranges per square foot
| Material | Decking only | With framing | DIY total (typical) |
|---|---|---|---|
| Pressure-treated pine | $3–6 | $6–9 | $7–10 |
| Cedar | $7–11 | $10–14 | $11–16 |
| Composite | $8–14 | $11–17 | $12–19 |
| Hardwood (ipe, cumaru) | $12–20 | $15–23 | $16–26 |
| Any + pro labor | — | — | +$15–35 |
National planning ranges, materials only unless noted. Regional prices vary widely — get local quotes.
Frequently asked questions
How much does it cost to build a deck per square foot?
DIY materials run about $7–10 per sq ft for pressure-treated pine, $11–16 for cedar and $12–19 for composite, including framing and fasteners. Hiring a builder typically adds $15–35 per sq ft in labor.
Is it cheaper to build a deck myself?
On a straight rectangular deck, DIY saves roughly the labor line — often the largest single item. The savings shrink on multi-level designs with stairs, curves or permits, where mistakes are expensive.
What adds the most to a deck's cost?
Material choice first, then extras: railings ($30–60 per linear foot installed), stairs, multi-level framing, permits and demolition of an old deck. The basic rectangle is the cheapest shape by a wide margin.
How much should I budget for overruns?
Add 10% on materials for waste, plus a 10–15% contingency on the total. Hidden problems — rotten ledger boards, footings below grade, permit fees — are where decks go over budget.