Composite Deck

Related reading: How Composite Decking is Installed


When it comes to expanding your living space and enhancing your outdoor enjoyment, a few additions match the allure of a well-designed deck. Among the variety of materials available for deck construction, composite decking stands out for its durability, low maintenance, and aesthetic appeal. But how much does a 20×20 composite deck cost? In this comprehensive guide, we’ll delve into the factors influencing composite deck pricing material prices and provide you with a clear picture of what to expect when planning your dream outdoor space.

Understanding Composite Decking

Before delving into the cost of a 20×20 composite deck, it’s crucial to grasp what composite decking entails. Composite decking, composed of wood fibers and plastic, combines the charm of wood with durability. It mimics the appearance of natural wood while holding several advantages over traditional wood.

This decking type boasts remarkable durability. It’s resistant to rot, mold, and pesky insects, ensuring a long-lasting investment. Low maintenance is another winning feature. Unlike wood, composite decking needs no staining or sealing and is free from splinters.

Composite decking offers a diverse aesthetic. With a wide range of colors and textures, it enables versatile design options, making your deck truly unique. Moreover, it’s an eco-conscious choice, as many composite materials incorporate recycled content, aligning with sustainability goals.

Understanding these fundamental aspects of composite decking sets the stage for estimating the cost of your dream 20×20 composite deck. It’s the starting point for planning your project effectively, combining both form and function while staying within your budget.

Install Composite Deck

Factors Influencing Composite Deck Cost

Several factors influence the cost of building a composite deck, and understanding these elements will help you plan your project more effectively. Here are the primary factors to consider:

Deck size

Deck size is crucial when determining the cost of your 20×20 composite deck. The size of your deck directly affects the amount of materials needed and, consequently, the overall cost. A 20×20 deck translates to 400 square feet in total area. Larger decks require more decking boards, framing, and other materials, leading to higher expenses.

However, a spacious deck offers more room for outdoor activities and furniture, enhancing your outdoor living experience. When planning your deck, consider how you’ll use the space and whether the extra size justifies the added cost. Smaller decks may be more budget-friendly, while larger ones provide more versatility and comfort, balancing your budget with your outdoor aspirations.

Deck Height and Complexity

The height and complexity of your deck significantly affect the overall cost. Higher decks or those with intricate designs involving multiple levels, curves, and unique features demand more materials and labor, driving up expenses. Elevated decks often require additional structural support, which can add to the construction cost.

Moreover, complex designs necessitate skilled labor and might take more time to build, further impacting the budget. Additionally, features like built-in seating, pergolas, or custom railings, while enhancing the aesthetics and functionality, can increase costs.

Composite Deck Material Choice

Choosing the right composite deck material is crucial. Options range from budget-friendly, low-end materials to premium, high-end choices. Your selection impacts your deck’s look, durability, and cost. Low-end composites are affordable but may lack premium features. Mid-range composites offer a balance of quality and affordability.

High-end composites boast advanced features and superior durability, albeit at a higher price. The material you choose shapes your deck’s character and long-term maintenance, so weigh your options carefully.

Site preparation

Site preparation involves getting your outdoor space ready for a composite deck. It includes tasks like clearing, grading, and creating a stable foundation. These steps ensure a solid base for your deck, promoting its longevity and safety. Costs vary based on your yard’s condition, with simple yards costing less than those needing extensive work. Keep in mind that proper site preparation is crucial for a successful deck project.

Accessories and features

This refers to extras you can add to your deck, like railings, lighting, or seating. These elements enhance your deck’s functionality and aesthetics but also impact the overall cost. Choosing simple, budget-friendly accessories can help save money, while more elaborate or custom features will increase your expenses. Consider your needs and budget carefully when deciding on these additions to ensure they align with your vision for your composite deck.

Permitting and Inspection Fees

These fees are associated with obtaining official permission for your deck construction and ensuring it meets safety standards. Local authorities often require permits, and inspections confirm your deck complies with regulations, contributing to safe and legal construction.

Geographical location

Prices vary regionally due to differences in labor rates and material availability. Areas with higher living costs typically have more expensive deck construction, while in regions with abundant materials and lower labor expenses, costs may be more budget-friendly.

Composite Deck Material Prices

To better understand the cost breakdown for a 20×20 composite deck, let’s explore the pricing of composite decking materials. Keep in mind that these prices are approximate and can vary depending on the brand, quality, and location.

Low-End Composite Decking: Expect to pay around $3 to $7 per square foot for basic composite decking materials. While these are budget-friendly options, they might lack some of the premium features and durability of higher-end materials.

Mid-Range Composite Decking: Mid-range composite materials typically cost between $7 to $9 per square foot. They offer a good balance between affordability and quality, with a range of design options.

High-End Composite Decking: Premium composite decking can cost $9 to $16 or more per square foot. These materials often boast advanced features, exceptional aesthetics, and increased durability.

Calculating the Cost of a 20×20 Composite Deck

Now, let’s calculate the estimated cost of a 20×20 composite deck using the price factors mentioned above. We’ll use a mid-range composite decking material priced at $8 per square foot as our baseline:

Deck Size: 20 feet by 20 feet equals 400 square feet.

Composite Material Cost: $8 (per sq. ft.) x 400 sq. ft. = $3,200.

Labor Costs: Labor costs can range from 15% to 50% of the material cost.

Additional Features: If you plan to add accessories or features, like railings or built-in seating, budget accordingly. This cost can vary widely based on your choices.

Site Preparation: Site preparation costs depend on the condition of your yard and any necessary groundwork. This can range from a few hundred to a few thousand dollars.

Permitting and Inspection: Check with your local government for permit costs ranging from $50 to several hundred dollars.

Tips for Cost Savings

If you’re looking to reduce the cost of your 20×20 composite deck project, consider these cost-saving tips:

DIY vs. Professional Installation: While DIY can save on labor costs, professional installation ensures quality and compliance with local codes.

Choose Mid-Range Materials: Opting for mid-range composite decking materials provides a good balance between cost and quality.

Plan Your Design: Keep your deck design relatively simple to avoid costly additions and intricate features.

Comparison Shopping: Obtain quotes from multiple contractors and suppliers to find the best prices in your area.

Maintenance and Longevity: Remember that composite decks require less maintenance over time, which can offset their initial higher cost.

Composite Deck 2


A 20×20 composite deck, such as those offered by EVODEK, can be a wonderful addition to your outdoor living space, providing a durable, low-maintenance, and aesthetically pleasing area for relaxation and entertainment.

While the cost of such a project can vary depending on several factors, including materials, labor, and location, careful planning and budgeting can help you achieve your dream deck within your desired budget. Don’t forget to factor in potential long-term savings in maintenance and the increased value and enjoyment of your home with a beautiful composite deck.