The cost to build a deck with Trex typically runs $30-$60 per square foot installed, or about $5,800-$11,500 for a basic 12-by-16-foot deck. Final pricing depends on deck size, Trex product line, framing, railing, site access, and local labor rates.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed deck, per sq ft | $30 | $45 | $60 | Basic to upgraded construction |
| 12-by-16-foot deck | $5,800 | $8,600 | $11,500 | 192 sq ft; typical access |
| Trex decking boards, per sq ft | $5 | $8 | $12 | Board price varies by line and color |
| Railing, per linear ft | $25 | $55 | $100 | Material and design affect price |
What a 12-by-16 Trex deck typically costs
A straightforward 192-square-foot deck generally costs $5,800-$11,500 installed, with an average near $8,600. That estimate assumes a low deck, standard pressure-treated framing, Trex Enhance or Select boards, basic stairs or no stairs, and ordinary site access. A raised deck, premium Trex Transcend boards, extensive railing, or substantial stairs can push the total to $12,000-$20,000 or more.
For early budgeting, use about $45 per square foot for a standard installed Trex deck. That rate generally includes decking, framing, fasteners, and contractor labor, but the written quote should confirm whether railing, stairs, demolition, and permits are included.
Assumptions: U.S. national planning ranges, standard materials, typical access, and a new deck without major structural or grading work.
How framing, Trex boards, and railing shape the quote
Deck estimates combine material, labor, and job-specific charges. The breakdown below uses a 192-square-foot project; component prices vary by market and design, and are not always listed separately by contractors.
| Cost component | Low | Average | High | Typical scope |
|---|---|---|---|---|
| Trex boards and fasteners | $1,000 | $1,600 | $2,400 | $5-$12 per sq ft |
| Framing and footings | $1,200 | $2,000 | $3,000 | Joists, beams, posts, concrete |
| Labor | $2,000 | $3,200 | $4,500 | Build and installation work |
| Railing and stairs | $500 | $1,100 | $2,200 | Depends on height and linear feet |
| Delivery, disposal, permits | $150 | $700 | $1,500 | Hauling and local requirements |
Framing and labor can rival the board cost, so compare complete installed quotes rather than board prices alone. A labor estimate may use ; rates commonly fall around $50-$100 per worker-hour, depending on location and contractor.
Which deck dimensions and Trex lines raise the price?
Size is a direct cost driver: at $30-$60 per square foot, a 10-by-12-foot deck (120 square feet) may cost $3,600-$7,200, while a 16-by-20-foot deck (320 square feet) may run $9,600-$19,200. Larger designs can have a lower per-square-foot rate if they avoid extra stairs or complex edges, but they still require more material.
Trex product selection also changes the estimate. Enhance is generally the more budget-conscious line, Select sits in the middle, and Transcend is a premium option; board pricing can differ by several dollars per square foot. A deck more than 30 inches above grade often needs code-compliant guards, while a design with multiple levels, diagonal boards, or stairs over 4 feet wide adds labor and material.
Ask the contractor to name the Trex line, board color, fascia, and fastener system in the quote. Similar-looking bids may specify different product grades or omit finished edges.
Can existing framing or simpler railing trim the budget?
Keeping a sound, code-compliant frame may reduce demolition and reconstruction costs, but composite boards need suitable joist spacing and structural support. Have the frame inspected before assuming it can be reused; rot, inadequate footings, or joists spaced too far apart can make replacement necessary. A contractor may charge $150-$500 for an inspection or assessment, sometimes credited toward the project.
Other controllable choices include a simple rectangular layout, standard board direction, one stair run, and fewer railing sections. Removing an old deck may add roughly $500-$2,000, depending on size and disposal needs. Confirm what prep and removal are included before choosing the lowest bid.
How long do Trex deck crews need on site?
A typical 12-by-16-foot deck may take a two- or three-person crew about 3-7 working days, assuming ordinary weather and no major grading or access problems. A low, ground-level platform can take less time; raised decks, stairs, custom railing, and complex framing extend the schedule. Labor charges depend on crew size, local wages, and whether the contractor prices the job by project or by time.
Ask for a written scope and schedule that separates construction labor from any demolition or repair work. That makes changes easier to evaluate if the crew discovers damaged framing or unstable soil.
Why Trex deck prices vary by U.S. region
Urban markets and high-cost coastal areas often price 10%-25% above a national midpoint because of higher wages, delivery expenses, and permitting requirements. Smaller towns may come in 5%-15% below that midpoint, although limited contractor availability can erase the difference. Remote locations can also add freight or travel charges.
Seasonal demand matters: spring and early summer are busy booking periods, while fall or winter scheduling may offer more availability in some climates. Weather and local building rules affect timing, so an off-season quote is not guaranteed to be cheaper. Compare at least three local bids with matching deck dimensions and material specifications.
Three Trex deck quotes for different project scopes
These examples show how material choice and job scope can change the total. They assume typical access and exclude unusual soil work or major utility relocation.
| Project | Scope and rate | Estimated total |
|---|---|---|
| Compact ground-level | 120 sq ft, Enhance boards, basic frame, $35-$45 per sq ft | $4,200-$5,400 |
| Standard family deck | 192 sq ft, Select boards, simple railing, $40-$55 per sq ft | $7,700-$10,600 |
| Raised premium deck | 320 sq ft, Transcend boards, stairs and railing, $50-$70 per sq ft | $16,000-$22,400 |
Use the examples as comparison points, not fixed quotes. The high-end example reflects more railing and elevated construction, not just a premium board upgrade.