Cost to Build a Deck (Full Budget Guide)

A deck is one of the best investments you can make in your home, often recouping 70-80% of its cost during resale. However, in 2026, the price of "pressure-treated" vs "composite" vs "hardwood" decking has reached a wide spread. This guide breaks down every dollar from the footings to the final coat of stain.

Segmenting Your Deck Budget

To accurately estimate a deck, you must view it as two separate structures:

1. The Substructure: The "bones" (posts, beams, joists). Usually built from Pressure Treated (PT) Pine.
2. The Surface: The visible deck boards and railings. This is where your material choices (Cedar, Composite, Ipe) vary the cost significantly.

2026 Material Cost Comparison (Per Sq. Ft.)

Structural Board Foot Estimation

While surface boards are often sold by length (Linear Feet), the beams and posts (the 4x4s and 6x6s) are sold by volume. Using our log and board foot tools is critical here to ensure you aren't paying for "over-sized" beams that aren't structurally required by your local zoning office.

The "Forgotten" Costs

Don't let these items surprise you at the checkout line:

• Hardware (Fasteners): Stainless steel screws for a 20x20 deck can cost upwards of $400.
• Permit Fees: In major US metros, a structural deck permit can range from $200 to $1,000 depending on the project value.
• Waste Factor: Unlike furniture, deck boards are cut to span specific widths. Expect 10-15% waste on your linear footage.

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