A new Trex deck is one of the bigger outdoor projects a homeowner takes on, and the price can swing a lot depending on choices you have not made yet. Board line, deck size, height, railings, and even your permit office all move the number. This guide breaks the cost down piece by piece so the final quote holds no surprises.
Before you price it out, it helps to know what Trex composite decking actually is and how the boards are built, because the product line you choose is the single biggest driver of cost. If you have that part settled, let us get into the numbers.
Every figure here is a current national average range. Your real cost depends on your yard, your design, and local labor rates in the Indianapolis area, so treat these as a planning framework, not a quote.
How Much Does a Trex Deck Cost? The Short Answer
For most homeowners, a professionally installed Trex deck runs about $45 to $70 per square foot, boards and labor together. That puts a typical backyard deck in the range of roughly $6,500 for a small deck to $28,000 or more for a large one.
The quick picture:
- Installed cost: about $45 to $70 per square foot, all in.
- Boards alone: about $5 to $15 per square foot, depending on the line.
- Labor: usually the larger share, around $27 to $42 per square foot.
- Biggest swing factors: product line, deck size, height, and railing choices.
Trex Deck Cost Per Square Foot
Per square foot is the most useful way to think about deck cost, because it scales cleanly to your size. There are two numbers that matter: the boards on their own, and the fully installed price with labor included.
On their own, Trex boards run about $5 to $15 per square foot. Fully installed, the range climbs to about $45 to $70 per square foot once you add framing, fasteners, and labor. Labor is usually the larger half of the bill, which surprises people who assumed the boards were the main expense.
Trex Deck Cost by Product Line
The line you choose sets the floor for your whole budget. Here is the installed cost per square foot for the main tiers, from entry to premium:
- Trex Enhance (Good): about $45 to $50 per square foot installed. The budget-friendly entry into composite.
- Trex Select (Better): about $55 to $60 per square foot installed. More colors and a solid board profile.
- Trex Transcend (Best): about $65 to $70 per square foot installed. The deepest grain, richest color, and longest warranty.
- Trex Signature (Luxury): at or above Transcend pricing. The top of the range for the most realistic look and highest scratch resistance.
The right line depends on your budget and how the deck will be used. The decking is only part of the picture, though. The rest of the decking material you choose, from the substructure to the railing, rounds out the total.
What Installation Adds to the Cost
Installation is where a deck budget is really won or lost. The same boards can cost very different amounts to install depending on the site and the design. This is the part a good contractor helps you plan for.
A few features drive labor and material costs the most. Railings run about $20 to $60 per linear foot, and stairs add roughly $20 to $30 per linear foot plus footings. Beyond the deck surface itself, railings, stairs, and other add-ons are often where a budget grows, so it is worth pricing them early.
Height and framing matter too. A tall or multi-level deck needs deeper footings and more structure than a simple ground-level rectangle, which raises the cost of the labor of building the deck. Add an optional under-deck drainage system ($1,000 to $4,000) or a building permit ($50 to $150), and the total shifts again.
Typical Total Cost by Deck Size
To make the per-square-foot ranges concrete, here is what a fully installed Trex deck tends to cost at three common sizes:
| Deck size | Approx. square feet | Typical installed cost |
|---|---|---|
| Small (12 x 12) | 144 sq ft | $6,500 to $10,000 |
| Medium (16 x 16) | 256 sq ft | $11,500 to $18,000 |
| Large (20 x 20) | 400 sq ft | $18,000 to $28,000 |
Totals assume a mid-range product line and standard design. Premium lines, tall decks, and elaborate railings push toward the high end.
Is a Trex Deck Worth the Cost?
Trex costs more upfront than a wood deck, and that is a fair thing to weigh. The case for it is what happens after the build. A pressure-treated wood deck needs staining or sealing every year or two, and it often needs board replacement within 10 to 15 years. A Trex deck asks for an occasional wash and typically lasts 25 to 30 years or more.
When you spread the numbers across the life of the deck, the gap narrows and often flips. You are trading a higher install price for years of skipped maintenance and far fewer repairs. For a homeowner who plans to stay put and actually use the deck, that trade usually favors composite.
How to Get the Most Deck for Your Budget
- Right-size the deck. A slightly smaller deck that fits your real use beats an oversized one you pay to heat up in the sun.
- Match the line to the space. Save the premium line for the deck surface people see and touch, and consider a mid-range line if the budget is tight.
- Keep the shape simple. Rectangles cost less to frame than curves and multiple levels. Complexity is where labor climbs.
- Plan railings and stairs early. These add-ons move the total more than most homeowners expect, so price them in from the start.
- Get a detailed written quote. A line-item quote shows exactly where the money goes and makes it easy to adjust before the build begins.
Trex Deck Cost in the Indianapolis Area
Local labor rates and site conditions shape the final number as much as the boards do. In the Indianapolis area, the freeze line means footings have to go deep enough to sit below it, which adds framing labor compared to a milder climate. Permit costs and inspection steps vary from one township to the next as well.
As a Platinum Deck and Patio team that builds across the metro, we quote each deck against the real site: the slope of the yard, the height off the ground, the railing and stair plan, and the local permit requirements. That is the only way to turn a national average into a number you can actually budget around.
Frequently Asked Questions
Is Trex more expensive than wood?
Yes, upfront. Trex costs more than pressure-treated wood to install. Over the life of the deck, the difference narrows, because Trex avoids the yearly staining and the earlier board replacement that a wood deck usually needs.
Why is labor such a big part of the cost?
Building a deck is skilled work: framing, footings, fastening, railings, and stairs all take time and expertise. On many projects, labor is the larger half of the bill, which is why site conditions and design complexity affect the total so much.
Does the Trex product line really change the price that much?
It does. Moving from the Enhance entry line to the Transcend premium line can add $15 to $25 per square foot installed. Across a whole deck, that is a meaningful jump, so the line you pick is worth deciding early.
Are there hidden costs I should plan for?
The common ones are railings, stairs, permits, and any under-deck drainage or lighting. None are truly hidden, but they are easy to leave out of an early mental estimate. A detailed written quote brings them all into view.
Can I lower the cost without lowering the quality?
Yes. Keeping the shape simple, right-sizing the deck, and choosing a mid-range line for less-visible areas all trim cost without cutting the durability that makes composite worth it in the first place.
The Bottom Line
A Trex deck typically costs about $45 to $70 per square foot installed, which puts most backyard projects somewhere between $6,500 and $28,000 depending on size, line, and design. Labor and add-ons like railings and stairs move the number as much as the boards themselves.
The smart way to budget is to start with your size and product line, then price the railings, stairs, and site work honestly rather than hoping they stay small. A detailed written quote from a builder who knows your area turns these ranges into a real plan.
Spend where it shows and lasts, keep the structure simple, and you end up with a deck that costs less to own than it looks, and that you will still be enjoying decades from now.