Trex Decking Cost Calculator
Estimate the cost of a Trex deck — enter your deck size, height and railing to get a low-to-high installed price and the cost per square foot. Trex composite decking typically runs $30–$60 per square foot installed.
How much does a Trex deck cost?
Trex is the best-known composite decking brand in the US. A Trex deck costs more up front than pressure-treated wood, but the capped composite boards resist rot, fading and stains and need almost no maintenance, which is what draws homeowners to it. The price depends on the Trex line you choose, the deck size and height, and railing.
As an installed all-in figure, Trex decking typically runs $30–$60 per square foot. On a 320 sq ft deck (16×20 ft) that is roughly $9,500–$19,000, before railing and stairs. The estimate above lets you set your size, height and railing to tighten the range.
cost = area × $30–$60/sq ft (× height) + railing length × rail rate
Building it yourself? Size the boards and hardware with the deck board calculator. Hiring out? Compare quotes from local deck builders below.
Deck cost by decking brand
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Frequently asked questions
How much does a Trex deck cost?
Trex composite decking typically runs $30–$60 per square foot installed. On a 320 sq ft deck (16×20 ft) that is roughly $9,500–$19,000, before railing and stairs. Trex is the best-known composite decking brand in the US. Enter your own size above for an estimate.
Is Trex worth the extra cost over wood?
Trex costs more up front than pressure-treated wood, but it resists rot, fading and stains and needs little upkeep, so it can be cheaper over the deck's life. Whether that trade-off is worth it depends on how long you'll keep the deck and how much maintenance you want to avoid.
How much of a deck’s cost is labor?
Labor is usually around half of a built deck’s cost, sometimes more for elevated or complex designs. The estimate above splits the midpoint roughly 45% materials and 55% labor; doing it yourself saves the labor portion but adds your time and tool costs.
Does the cost include railing and stairs?
Railing adds meaningfully to the total — often $20–$60 per lineal foot installed — and stairs add a few hundred dollars per flight. The calculator includes a railing option and a height factor; unusual features like built-in benches, lighting or multiple levels would add more.