Building a 20x20 composite deck is a great way to enhance your outdoor living space. Not only will it increase your home’s value, but it also provides a durable and low-maintenance area for relaxation, entertaining, and dining. However, understanding the cost breakdown for a 20x20 composite deck is essential for making an informed decision.
Let’s dive into the specifics of how much a 20x20 composite deck could cost, including the material options, installation, and any optional upgrades.
1. Understanding the Size of a 20x20 Composite Deck
A 20x20 composite deck covers an area of 400 square feet - plenty of room for various activities like barbecuing, lounging, and dining. To calculate how much decking material is needed, we need to figure out the linear footage. Since composite decking is typically sold by the linear foot, knowing the material requirements will help determine the cost.
To get an idea of the amount of decking material needed, consider the standard board size, which is approximately 5-1/8" wide (or 0.428 feet). With a 400-square-foot deck, you would need 800 linear feet of decking.
2. Material Options and Pricing
Now that we know the dimensions of a 20x20 composite deck, let's look at the material options available for your project and their respective pricing.
TruNorth® Enviroboard
This is a great option for anyone looking for durable, eco-friendly composite decking boards. Here’s the pricing for TruNorth® Enviroboard Composite Decking:
- Solid Colors: $3.07/linear foot
-
Variegated Colors: $3.59/linear foot
(Available in 12', 16', and 20' lengths)
For a 20x20 composite deck (400 sq. ft.), the required linear footage is calculated as:
400 sq. ft. × 2.28 = 912 linear feet
Cost Breakdown for TruNorth® Enviroboard
- Solid Colors: 912 linear feet × $3.07/foot = $2,800.84
- Variegated Colors: 912 linear feet × $3.59/foot = $3,273.08
Pricing varies based on the user's location. You can view the cost breakdown on our product page by entering the square footage and selecting the hardware options, and the calculations will be done automatically.
TruNorth® Solid Core Board
If you prefer a more premium material, the TruNorth® Solid Core Composite Decking is available at:
- Solid Colors: $5.19/linear foot
- Variegated Colors: $6.07/linear foot
(Available in 16' and 20' lengths)
Cost Breakdown for TruNorth® Solid Core Board
These boards are typically used for the borders of the deck or stairs, but sometimes for the decking part as well.
- Solid Colors: 912 linear feet × $5.19/foot = $4,735.28
- Variegated Colors: 912 linear feet × $6.07/foot = $5,530.08
3. Additional Material Costs
Pricing for a 400 sq. ft. deck varies significantly based on design complexity and material choice (composite vs. PVC). Features like stairs, borders, and fascia can increase costs, making each project unique.
Beyond the decking boards, additional materials are essential to complete your deck:
Breakdown of Additional Costs
Frame (Joists, Beams, and Posts): Depending on materials and design complexity, framing costs range from $500 to $1,000 for a 20x20 deck.
Fasteners and Clips: TruNorth® decking requires specific fastening clips for installation. Costs range from $100 to $300, depending on the quantity.
Clip Calculation:
- 2.5 clips per sq. ft. (for joists 16” apart)
- 5 clips per sq. ft. (for joists 12” apart)
For a typical 20x20 deck with 16” joist spacing, you’ll need around 1,000 clips.
TruNorth® Fascia Board (Optional): For a clean, finished edge, fascia boards are available at $5.95 per linear foot (solid & variegated colors, 12' lengths).
Fascia boards not only enhance the aesthetic appeal but also provide a polished, professional look by covering exposed deck edges.
4. Labor Costs
While you can choose to build the deck yourself, hiring a professional can save you time and ensure a quality installation. On average, labor for a 20x20 composite deck ranges between $30 to $60 per hour. Typically, a team of professionals will take 3 to 5 days to complete the project, depending on its complexity.
For a project like this, labor costs could be anywhere from $2,000 to $4,000. Additional costs may apply if permits are required, which can range from $100 to $500 depending on local regulations.
5. Optional Add-Ons
Enhancing your composite deck with optional upgrades can improve its functionality, safety, and visual appeal. Below are some key add-ons to consider:
Aluminum Railings
Railings play a crucial role in ensuring safety while also adding a refined aesthetic to your deck. The cost of railings can vary widely based on materials and design, typically ranging from $1,500 to $3,000.
For those looking for durable and stylish railing solutions, we offer aluminum railings with the following specifications:
Top Trail Types: Alta, Victorian
Panel Options:
- Stair (6 feet): $234.05
- Stair (8 feet): $270.28
- Deck (6 feet): $219.55
- Deck (8 feet): $255.79
Available Colors: Black, White, Bronze
These aluminum railings provide both stability and a sleek, modern finish to your outdoor space.
Stairs
For elevated decks, stairs are essential to ensure safe and convenient access. The cost of installing stairs varies depending on the design and complexity, typically ranging between $500 and $1,500. Whether you need a simple stair setup or a more intricate design, stairs add both safety and functionality to your deck.
Lighting
Proper lighting enhances the ambiance of your deck and improves visibility at night. Investing in deck lighting not only boosts the overall aesthetics but also enhances safety. Lighting options range in price from $200 to $800 for a complete set.
We offer the following lighting solutions:
- 3" Solar LED Post Cap Perimeter Light: $78.99 each
- LED Post Cap Perimeter Light (Wired): $86.24 each
These lighting options are perfect for creating a warm, inviting outdoor space while improving nighttime visibility.
6. Estimated Cost Breakdown for a 20x20 Composite Deck
Considering all the essential components, below is an estimated cost breakdown for constructing a 20x20 composite deck boards:
Decking Boards (800 Linear Feet)
- Solid Colors: $2,048
- Variegated Colors: $2,224
- Solid Core Board (Premium Option): $2,960
Frame, Fasteners, and Clips
- Estimated Cost: $600 – $1,300
Labor Costs
- Estimated Range: $2,000 – $4,000
Optional Upgrades
- Railings and Stairs: $1,500 – $4,500
- Lighting: $200 – $800
Total Estimated Cost
Depending on material selection, optional features, and labor expenses, the total cost for a 20x20 composite deck typically falls between $4,848 and $13,560. Over the long term, it actually costs cheaper to have a composite deck as compared to wood. Wood decks last about 10-15 years, while composite decks last 25+ years.
In summary
A 20x20 composite deck boards is a fantastic investment in your home, offering a long-lasting, low-maintenance outdoor space. Whether you opt for the affordable TruNorth® Enviroboard or the premium TruNorth® Solid Core Board, you’re guaranteed a high-quality decking solution.
By carefully considering your material choices, additional features, and labor costs, you can create a beautiful, functional deck that suits your style and budget. Contact us today for top-quality composite decking at $2.56 per linear foot and start building your dream deck!