Estimate deck construction cost based on area, material grade, and labor rate.
Cost breakdown
DIY vs contractor
Usage Tip
Composite costs more up front but skips the staining and sealing that pressure-treated wood needs every couple of years.
labor = area × labor rate
total = material + labor
This is a planning estimate, not a quote; framing, footings, and railings can add a lot.
How much does a deck cost?
A deck is priced by the square foot, but the total swings wildly with the decking material, whether you add railings and stairs, and who swings the hammer. Pressure-treated lumber is the budget choice; composite and PVC cost two to three times as much in material but last far longer with less upkeep. This calculator breaks the estimate into decking, framing, fasteners, railings, stairs and labor, then shows the DIY material cost beside the full contractor-installed price.
Deck cost by material
Installed cost per square foot, materials and labor combined. Material alone is roughly a third to half of these figures.
| Material | Installed cost per sq ft |
|---|---|
| Pressure treated | $15 to $35 |
| Cedar | $20 to $45 |
| Redwood | $25 to $50 |
| Composite | $30 to $60 |
| PVC | $35 to $70 |
Composite deck cost
Composite decking (Trex, TimberTech and similar) runs higher up front — figure $30 to $60 per square foot installed — but resists rot, splinters and fading and rarely needs more than a wash. Over 15 to 25 years the lower maintenance often closes the gap with wood. The framing underneath is still pressure-treated lumber either way.
What goes into deck cost?
The decking boards are only part of it. A realistic estimate also covers the framing, the fasteners and hardware, railings, any stairs, footings and miscellaneous, and labor if you hire out. Railings in particular surprise people — they can add a fifth of the total on a small deck.
| Item | Share of a typical build |
|---|---|
| Decking surface | Largest material line |
| Framing | Joists, beams, ledger |
| Railings | Often a surprise cost |
| Stairs | Per step and width |
| Fasteners and footings | Smaller but real |
| Labor | Frequently the biggest single line |
DIY vs contractor
Labor is usually the largest single line in a deck estimate, so building it yourself can roughly halve the cost — if you have the time, tools and skill. A deck that runs $3,200 in materials might land near $7,700 installed once labor is added. This calculator shows both numbers side by side so the trade-off is clear before you commit a weekend, or several.
Average installed deck costs by size
| Deck size | Pressure treated | Composite |
|---|---|---|
| 10 x 10 (100 sq ft) | $2,500 to $5,000 | $4,000 to $8,000 |
| 12 x 16 (192 sq ft) | $4,000 to $8,000 | $7,000 to $14,000 |
| 16 x 20 (320 sq ft) | $7,000 to $14,000 | $12,000 to $24,000 |
Frequently asked questions
How much does a 12x16 deck cost?
Roughly $4,000 to $8,000 installed in pressure-treated lumber, or $7,000 to $14,000 in composite. Materials alone are far less if you build it yourself.
Is composite decking worth the extra cost?
For low maintenance and long life, often yes. It costs more up front but rarely needs staining or sealing, which adds up over decades.
How much can I save building a deck myself?
Labor is usually the biggest line, so DIY can cut the total by roughly 40 to 60 percent — if you have the skills and time.
Do railings add much to the cost?
Yes. Railings can add a noticeable share on a small deck, and composite or metal rail systems cost considerably more than wood.
What is the cheapest decking material?
Pressure-treated lumber, by a wide margin in material cost. It needs regular sealing to last, which is the trade-off.
Does my region change the price?
Significantly. Labor and material costs vary by area; a deck in a high-cost metro can run a third more than the same deck in a low-cost region.
Deck Board Calculator · Stair Stringer Calculator · Concrete Calculator · Gravel Calculator · Post Hole Calculator
Coming soon: Deck Railing Calculator
Estimates are for planning and use typical national average rates; actual prices vary widely with material grade, design complexity, site access, permits, footings and local labor. Get itemized quotes from local contractors and suppliers before budgeting.