Calculate Your Decking Costs Today

Learn about the different cost factors to confidently build a deck that fits your lifestyle and budget.
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How Much Does it Cost to Build a Composite Deck?

On average, the estimated material cost for Trex decking runs from $10 - $27 per square foot (including substructure, decking, hardware, and fasteners). But there are key factors that will impact the final cost.*

DECK SIZE

The size of your deck makes a big difference in pricing. It helps determine the materials and labor costs needed to build your deck.

DESIGN

The design, shape and chosen product line for your deck will affect material and labor costs depending on its complexity and price point.

MATERIALS

Decking materials could include a substructure, decking, railing, hardware and any design-based add-ons. The condition of a current substructure can impact a size-able portion of cost.

LABOR

Labor and management account for nearly two-thirds of total costs no matter your desk design. We can help you find a builder or you can build it yourself.

 

The Trex Difference

Trex decking isn’t just built to last—it’s made to transform your outdoor space into a place you’ll love for years, with less work and more wow.

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Savings That Add Up

While the upfront cost of wood may seem lower, over 50 years–Trex’s top warranty length–on average, a wood deck costs 40% more in maintenance due to frequent repairs, sanding and staining.

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A Deck That Lasts

While wood decks often call it quits around the 15-year mark, Trex is built differently.  

Engineered for the long haul, Trex decking comes with warranties ranging from 25 to 50 years, depending on your product line.

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Deck Cost FAQs

01
How much does a 14x20 deck cost?

Labor costs depend on a contractor's specific rates and fees, but a typical estimate for a 14x20 deck ranges between $8,400 and $16,800* total. This doesn't account for additional fees and services like a consultation.

02
How much does a 16x20 deck cost?

Following the same method for a slightly longer deck, let’s look at figures for a 320 square foot deck. Factoring professional labor costs, a 16x20 deck costs around $9,600 to $19,200**. You can see how even a small increase in your deck size can have significant cost implications.

**Source: HomeAdvisor "How Much Does it Cost To Build A Deck?" 2025

03
How much does a 20x20 deck cost?

The cost of a 20x20 deck can vary greatly depending on materials, labor, location, and additional features. On average, you might expect to pay between $12,000 and $24,000 for a professional installation of this size. It's best to get quotes from local contractors for a more accurate estimate.

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* Source: HomeAdvisor “How Much Does Trex Decking Cost?” 2025

This content was partially or fully generated by AI and has been reviewed by our team to ensure accuracy and relevance.

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