A Trex deck typically costs $25-$45 per square foot installed, or about $7,500-$13,500 for a basic 300-square-foot deck; complex projects can exceed $60 per square foot. The cost depends on deck size, board line, framing, railings, demolition, labor, and local building requirements. “Trek deck” searches often mean Trex composite decking, so the estimates below cover Trex products and typical U.S. installation costs.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed Trex deck | $25 per sq ft | $35 per sq ft | $60+ per sq ft | Framing and finish details change the rate |
| 300-sq-ft deck | $7,500 | $10,500 | $18,000+ | Before unusual access or extensive demolition |
| Trex decking boards | $5 per sq ft | $8 per sq ft | $12+ per sq ft | Material pricing varies by product line |
| Labor | $10 per sq ft | $18 per sq ft | $30+ per sq ft | More for stairs, elevated decks, and intricate layouts |
What a 300-square-foot Trex deck usually costs
For a straightforward, ground-level 300-square-foot deck with standard Trex boards and basic railing, a practical installed budget is $7,500-$13,500. A broad national range is $25-$45 per square foot, with a midpoint near $35. Premium boards, extensive stairs, higher elevations, or custom railing can push the same project to $18,000 or more.
For a standard-size deck, budget about $10,500 before adding demolition, complex stairs, or major structural work. This assumes ordinary access, a simple rectangular shape, pressure-treated framing, and midrange decking. The estimate generally includes boards, installation labor, fasteners, and basic railing, but quotes differ on permits, old-deck removal, and footings.
Small decks may have a higher per-square-foot rate because design, travel, setup, and inspection costs are spread across less area. Larger, simple decks can cost less per square foot, although their total price is higher. A 200-square-foot project might land near $5,000-$9,000, while a 400-square-foot project may run $10,000-$18,000 at similar specifications.
Assumptions: U.S. contractor installation, standard access, basic pressure-treated framing, and no major repairs or unusual site work.
How decking, framing, railing, and labor shape the quote
A deck estimate combines visible finish materials with structural work. The following ranges are useful for a typical project; the final allocation depends on whether the existing frame can be reused and how much railing or stair work is included.
| Cost component | Typical range | Pricing basis | What changes it |
|---|---|---|---|
| Trex deck boards | $5-$12+ per sq ft | Board material only | Product line, color, board profile |
| Framing and footings | $5-$15 per sq ft | Materials and installation | Height, span, soil, code requirements |
| Installation labor | $10-$30+ per sq ft | Deck construction | Stairs, pattern, access, crew rates |
| Railing and stairs | $30-$120 per linear ft | Installed railing; stairs vary by design | Material, height, number of turns |
| Removal and disposal | $3-$8 per sq ft | Existing deck demolition | Deck condition, hauling distance, access |
| Permits and inspections | $100-$800 | Local project fees | Jurisdiction and project scope |
Labor and structural framing can account for a large share of the finished price, not just the Trex boards. A board-only quote is not comparable to a complete installed quote. Check whether the estimate includes joists, beams, posts, connectors, fascia, hidden fasteners, stairs, railing, taxes, and cleanup.
Labor can be estimated as . A small crew may take 3-7 working days for a simple deck, with more time for demolition, stairs, elevated framing, or inspections. Contractors may price by the square foot, by task, or as a project total rather than listing hours.
Which Trex board line, deck height, and layout change the price?
Trex product lines and board profiles have different material prices. A basic capped composite option may keep board costs near $5-$8 per square foot, while higher-end lines or specialty colors can bring material costs to $9-$12 or more per square foot. These are planning ranges, not fixed manufacturer prices; dealer availability and board dimensions affect quotes.
Deck height is a major structural cost driver. A low deck with short posts typically requires less framing than a deck several feet above grade, where stronger supports, stairs, guards, and more complicated access may be required. Once the walking surface is 30 inches or more above grade, many local codes require guardrails, though rules vary by jurisdiction.
Layout also matters. A rectangular design uses boards and framing efficiently. Angled boards, borders, picture-frame edges, curves, and multiple levels require more cuts and labor. A 45-degree board pattern can add roughly 10%-20% to installation labor and may increase material waste, depending on the design.
Product upgrades affect board cost, while height and design complexity can raise both materials and labor. Confirm the exact board line, color, surface, fastening method, and edge finish in writing. A quote that says only “composite decking” may not specify the Trex product being installed.
Joist spacing is another specification to verify. Composite decking generally needs closer support than some wood decking, and manufacturer instructions set the allowed spacing for each installation pattern. If existing joists are too far apart, adding framing can add hundreds or thousands of dollars, depending on deck size and access.
What three real Trex deck quotes might include
These examples show how size and scope affect a contractor estimate. They use illustrative U.S. pricing and are not bids for a particular location.
| Project | Scope and rate | Estimated total | Notable price drivers |
|---|---|---|---|
| 200-sq-ft ground-level deck | Basic boards and framing at $32-$40 per sq ft | $6,400-$8,000 | Simple shape, little or no railing |
| 300-sq-ft family deck | Midrange Trex, railing, and labor at $35-$48 per sq ft | $10,500-$14,400 | Some stairs and standard footings |
| 400-sq-ft elevated deck | Premium boards, stairs, and railing at $45-$65 per sq ft | $18,000-$26,000 | Higher structure and more complex installation |
Compare totals only when the deck dimensions, framing plan, railing, and removal scope match. If one quote excludes stairs or assumes reusable framing and another includes new footings, the lower total may not represent a lower price for the same job.
Ask each contractor to state the deck’s square footage and the price per square foot, plus separate totals for framing, boards, railing, stairs, demolition, and permits. That breakdown helps identify whether a price difference comes from a better product, different structural assumptions, or omitted work.
When demolition, stairs, and site access add to a Trex estimate
Replacing an existing wood deck can add roughly $3-$8 per square foot for removal and disposal. A 300-square-foot teardown might therefore add $900-$2,400, with more expense if the deck is difficult to reach, fastened heavily, or built high above the ground. Hazardous materials or damaged framing may require separate assessment and are not included in ordinary demolition pricing.
Stairs and railings are often priced separately from the deck surface. Basic railing may cost $30-$60 per linear foot installed, while metal or glass-infill systems can reach $60-$120 or more per linear foot. Stair pricing varies with width, height, landings, and rail requirements; a compact set of stairs may add several hundred dollars, while a long or multi-landing stair system can cost several thousand.
Site conditions can also bring equipment and labor charges. A narrow side yard, steep slope, limited parking, or long material-carry distance slows delivery and installation. In some cases, equipment rental or hand-carrying increases the quote; a contractor may also charge a minimum project fee for a small deck.
Removal, stairs, and restricted access should appear as distinct quote items whenever possible. This makes it easier to compare bids and decide whether to retain sound framing, adjust stair placement, or change the design before work starts.
How Midwest, coastal, and major-city labor rates compare
Deck pricing varies by labor market and local demand. A typical project in a lower-cost rural or Midwestern market may be 5%-15% below a comparable urban quote. High-cost coastal cities and dense metro areas can run 10%-25% above the national midpoint, especially where contractor availability, insurance, delivery, or permit requirements raise operating expenses.
These differences do not mean a regional low bid is automatically a better value. Local climate and code requirements can change footing depth, drainage details, railing specifications, and seasonal scheduling. Coastal exposure may also lead homeowners to choose hardware and finishes suited to moisture or salt air, while freeze-thaw areas may require more attention to footings and drainage.
Use local quotes for the final budget because a national per-square-foot range cannot capture city-level labor and code costs. For an initial estimate, apply a regional adjustment to the same scope rather than comparing a simple ground-level deck in one market with an elevated build in another.
When collecting bids, ask contractors to identify their service area, permit assumptions, insurance, and expected start date. A quote that is 20% above another may reflect a different warranty, framing specification, or labor schedule rather than an unreasonable markup.
Can keeping the old frame lower the replacement price?
Reusing existing framing can reduce the cost if the joists, beams, posts, and footings are sound, properly spaced, and compatible with the selected Trex boards. A contractor should inspect for rot, loose connections, movement, water damage, and code issues before estimating a resurfacing project. Replacing only the surface may save several thousand dollars on a medium deck, but unsuitable framing can lead to added costs later.
Replacing deck boards with Trex over a serviceable structure may cost roughly $15-$30 per square foot, depending on demolition, new fasteners, fascia, and repairs. A full rebuild with new framing commonly falls closer to $25-$60 or more per square foot. These ranges overlap because project height, railing, and labor can matter as much as whether the frame is reused.
Resurfacing is only a savings when the frame passes inspection and meets the decking manufacturer’s installation requirements. Ask for the inspection findings in the estimate, including any joist-spacing corrections, replaced boards, or new hardware. If repairs are extensive, compare the resurfacing total with the cost of a complete rebuild.
Wood decking may have a lower initial material cost, but it generally needs periodic cleaning, sealing, or staining. Trex usually avoids those recurring coating tasks, although it still needs cleaning and may need occasional board or fastener repairs. The right comparison is the installed price plus expected upkeep, not the board price alone.
Which upgrades are worth trimming from the deck budget?
Keeping the footprint rectangular, using a standard board direction, and choosing a common color can control material waste and labor. A simple design may avoid the extra cuts and framing required for curves, multiple levels, or diagonal patterns. Reducing the deck size by 50 square feet at $35 per square foot can lower a typical installed estimate by about $1,750, before any fixed costs are considered.
Review premium features separately. Picture-frame borders, hidden lighting, decorative fascia, upgraded railing, and built-in benches can improve appearance or function, but each adds materials and labor. Keep features that solve a practical need and price optional details as separate line items so they can be added later if the budget allows.
The most controllable savings usually come from a simpler layout, a carefully chosen board tier, and a clear scope—not from skipping structural requirements. Do not reduce joist support, footing depth, connectors, or required guards to lower a bid. Those items affect safety, code compliance, and the long-term performance of the deck.
Get at least three written estimates based on the same plan and product specifications. Schedule work outside peak demand if local contractors offer more flexible timing, but confirm that the proposed start date and materials are secured. Ask whether the quoted price includes sales tax, delivery, disposal, permit fees, and cleanup.
Before signing, check payment stages, change-order rates, workmanship coverage, and the manufacturer’s product warranty terms. Trex material warranties do not replace a contractor’s installation warranty, and warranty coverage can depend on proper installation and maintenance. A complete scope and documented product selection make unexpected charges less likely.