Trex has become shorthand for composite decking, and homeowners drawn to its low-maintenance promise almost always ask the same first question. So how much to install Trex decking? Fully installed, most projects run $30 to $60 per square foot, which puts a typical 300-square-foot deck somewhere between $9,000 and $18,000. That is more than pressure-treated wood upfront, but Trex never needs staining or sealing, so the lifetime math often favors it. This guide breaks down the board lines, labor, framing, and extras that make up the real number.
Trex Board Lines and Their Prices
Trex sells several product tiers, and which one you choose is the biggest driver of material cost. All are capped composite, a wood-and-recycled-plastic core wrapped in a protective polymer shell, but the shell quality, color range, and warranty differ.
- Trex Enhance Basics — the entry line, fewer colors, roughly $2 to $4 per linear foot of board
- Trex Enhance Naturals — richer colors and better fade resistance, roughly $3 to $5 per linear foot
- Trex Transcend — the premium line with deep wood-grain looks and a 50-year warranty, roughly $4.50 to $8 per linear foot
- Trex Signature — the top tier with the most realistic hardwood aesthetics, the priciest option
Translated to deck area, decking boards alone run roughly $6 to $16 per square foot depending on the line, before framing, fasteners, and labor.
The Full Installed Cost Breakdown
The board price is only part of the picture. A complete installed Trex deck includes several cost layers:
- Decking boards: $6 to $16 per sq ft depending on the Trex line
- Substructure (framing): pressure-treated joists, beams, and posts, $8 to $18 per sq ft, or more with steel framing
- Hidden fasteners and hardware: the clip system Trex uses for a screw-free surface, $1 to $2 per sq ft
- Labor: $15 to $30 per sq ft, the single largest variable
- Permits: $150 to $700 depending on your municipality
Labor is where quotes diverge most. A simple ground-level rectangular deck installs efficiently; an elevated, multi-level, or curved deck with lots of cutting takes far longer and costs more per square foot.
Why Framing Matters So Much
People focus on the Trex boards and forget that a deck is mostly what you do not see. The substructure, the joists, beams, posts, and footings, must be built to code and carries the entire load. Most Trex decks still use pressure-treated lumber framing, which is economical, but for ground-contact durability or coastal environments, some builders upgrade to steel framing or Trex’s own structural components, adding cost. Joist spacing matters too: Trex requires joists no more than 16 inches on center for standard installation and 12 inches for diagonal patterns, so a diagonal or herringbone board layout needs more framing and more labor.
Add-Ons That Change the Total
Optional features can add thousands to a Trex project, and they are worth budgeting for upfront rather than discovering mid-build.
- Railing: Trex composite or aluminum railing runs $60 to $200+ per linear foot installed, often the single biggest add-on
- Stairs: $150 to $500 per step, since each requires framing and cutting
- Fascia and trim: matching board wrap for a finished edge, $5 to $10 per linear foot
- Built-in lighting: deck and stair lights, $30 to $150 per fixture plus wiring
- Elevated deck footings: deeper concrete footings and taller posts add framing cost
Railing alone can add 15 to 30 percent to a deck’s total, so if the budget is tight, that is often where homeowners economize.
Total Cost by Deck Size
Here is what typical Trex projects run fully installed at a mid-range $45 per square foot:
- Small deck (150 sq ft, 10 x 15): roughly $5,000 to $9,000
- Average deck (300 sq ft, 15 x 20): roughly $9,000 to $18,000
- Large deck (500 sq ft with stairs and railing): roughly $18,000 to $32,000
Elevated decks with substantial railing, stairs, and lighting land at the top of these ranges, while a simple ground-level platform sits near the bottom.
Trex vs Wood: The Lifetime Math
Pressure-treated wood decking installs for $15 to $35 per square foot, roughly half the upfront cost of Trex. But wood demands staining or sealing every one to three years at $500 to $1,500 per treatment, plus board replacement as it rots, warps, and splinters. Trex needs only occasional soap-and-water cleaning and carries a 25- to 50-year warranty depending on the line. Over 20 years, the maintenance savings often close the gap, and Trex holds its appearance far better, which helps at resale. If you plan to keep the home long term, the composite premium frequently pays for itself.
What Drives Labor Costs Up
Labor is the most variable line in any Trex quote, and understanding what inflates it helps you budget and even redesign to save. Height is the biggest factor: a ground-level deck installs quickly, while a second-story deck requires taller posts, deeper footings, scaffolding, and more safety measures, pushing labor toward the top of the range. Complex shapes add up too. Curves, angles, multiple levels, picture-frame borders, and diagonal or herringbone board patterns all multiply the cutting and fitting time.
Regional labor rates matter as well; deck builders in high-cost metro areas charge considerably more than those in rural markets. Site access affects the number too, since a backyard reachable only through a narrow gate means every board and bag of concrete is carried by hand. If your budget is tight, a simple rectangular ground-level deck with standard straight board runs delivers the most square footage per dollar.
Getting Accurate Deck Bids
To compare Trex quotes fairly, make sure each builder prices the same scope. Specify the exact Trex line and color, the framing material (pressure-treated versus steel), the railing style and length, the number of stairs, and any lighting or fascia. Ask for an itemized bid separating materials, framing, decking, railing, stairs, labor, and permits, so you can see where the money goes and spot padding. Confirm whether the quote includes the permit and inspection, demolition of any existing deck, and disposal.
Get at least three bids from licensed, insured deck builders, and check that they are Trex-familiar, since proper hidden-fastener spacing and joist layout affect both the warranty and the finished look. The lowest bid is not always the best value if it cuts corners on framing you will never see but absolutely depend on.
Frequently Asked Questions
How much does it cost to install Trex decking per square foot?
Fully installed, Trex decking runs $30 to $60 per square foot, including boards, framing, hidden fasteners, and labor. The exact figure depends on the Trex line, deck height and complexity, and your local labor rates.
Is Trex more expensive than wood decking?
Yes, upfront. Trex costs roughly double pressure-treated wood to install. But Trex needs no staining or sealing and lasts decades, so lifetime maintenance savings often offset the higher initial price.
What is the cheapest Trex line?
Trex Enhance Basics is the entry-level line with the lowest board price and fewer color choices. Enhance Naturals adds better fade resistance, while Transcend and Signature are the premium tiers with richer looks and longer warranties.
Does the price include railing and stairs?
Usually not by default. Railing adds $60 to $200+ per linear foot and stairs $150 to $500 per step. Always confirm whether a quote includes these, since they can add 15 to 30 percent or more to the total.
Can I install Trex decking myself?
A handy DIYer can install a simple ground-level Trex deck, saving the labor portion. However, framing must meet code, and elevated decks, stairs, and permits often make professional installation the safer, and sometimes required, choice.
So how much to install Trex decking? Budget $30 to $60 per square foot fully installed, driven mostly by the board line, framing, and labor, with railing and stairs as major add-ons. It costs more than wood upfront, but with zero staining and a decades-long warranty, Trex often wins the long game.
