
The cost of expanding your outdoor space with an elevated deck depends on the project size and the materials used. Plan your project budget with this guide.
Everything you need to build your dream deck
Your deck building materials include structural lumber for posts and joists, ready-mix concrete for footings, fasteners like bolts and screws, decking boards, and railings.
Expect to pay $30 to $60 per square foot for professional deck construction, with total costs ranging from $4,350 to $14,400 depending on your deck size.
Your deck's foundation needs concrete tube forms sized correctly, with 8-inch tubes requiring 0.53 bags of concrete per foot and larger tubes requiring proportionally more material.
Hiring a local deck building professional keeps your project on schedule with proper framing, railing installation, and code compliance for a safe, stable outdoor space.
A deck provides a comfortable outdoor space where you can lounge, play, work, or entertain friends in the warmer months. If you’re planning to build a deck, you need to know what kinds of materials go into this project. This deck building materials list gives you the rundown on what you’ll need to build the deck of your dreams.
Before you start researching how to build a deck and begin the project, you’ll need to check that you have the correct materials. Here’s what you’ll need to get started:
Structural-grade lumber: posts, rim joists and beams, and deck boards
Ready-mix concrete
Concrete tube forms
Concrete bolts
Galvanized structural deck screws or nails
Exterior wood screws
Decking
Railings
Learn more about the importance of each of these materials to your deck-building project before you call a local deck-building pro for a project quote.
Lumber will comprise the deck’s foundation, frame, and stairs, making it one of the most crucial materials for this project.
The foundation is comprised of piers and footings set into concrete (more on that below) to ensure strength and stability. The frame is composed of a ledger that attaches to the house, rim joists that connect the frame and flooring, inner joists that support the deck boards, a supportive beam and posts, and stringers that support the deck stairs. All of these elements are made from lumber.
You can also use composite or PVC decking materials as an alternative to lumber. These materials are resistant to rot and insect damage, making them a low-maintenance choice. However, composite decking materials are often much more expensive than wood.
Concrete helps secure your deck to the ground and contributes to its structural stability. After you have cut the supportive posts to size, it’s time to set the posts in sturdy concrete. The amount you’ll need depends on the size of the concrete tube you’re using for the post bases. Here’s how many 80-pound bags of concrete you’ll need for different concrete tube diameters.
For 8-inch tubes, use 0.53 bags per foot.
For 10-inch tubes, use 0.8 bags per foot.
For 12-inch tubes, use 1.2 bags per foot
For 14-inch tubes, use 1.6 bags per foot.

You’ll need fasteners like bolts, screws, and nails to attach the different parts of your deck for safety and security.
Concrete bolts secure the deck posts to the concrete bases, ensuring the deck remains stable and sturdy. Galvanized structural deck screws or nails are used to form the deck foundation—you’ll use them to attach the rim joists to the deck posts and the inner joists to the frame.
The decking refers to the boards that make up the deck’s surface. The amount of decking you need depends on the desired size of your deck. First, measure your deck’s width, then divide it by the width of the decking board. For example, a 12-foot-wide deck measures 144 inches in width. If you use 5 ½-inch-wide boards, you’ll need around 26 deck boards.
Building codes generally require railings if your deck is 30 inches or more above ground level, though many people add railings to shorter decks for aesthetic and safety purposes. The railings must be at least 36 inches (three feet) high, with no more than four inches between spindles or between the bottom of the railing and the deck floor.
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From average costs to expert advice, get all the answers you need to get your job done.

The cost of expanding your outdoor space with an elevated deck depends on the project size and the materials used. Plan your project budget with this guide.

Thinking about adding a deck to your home? Explore this guide to learn about the average cost to build a deck based on factors like size, material, and labor.

Building a composite deck can increase your home’s appeal and value. Composite decking costs depend on the size of your deck, the materials, labor, and more.

If you’re preparing to build or replace a deck or porch, here are the first questions you should be asking a contractor before hiring them for the project.

When determining how to plan a deck, follow these tips to account for regulations, functional needs, landscaping issues, material differences, and more.

Save time and money by learning how to hire a deck-building pro who has the qualifications and skills to design and build your dream deck.