Deck Installation Cost Calculator

Estimate the cost of building a new deck based on size and material choice.

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Enter your values and click Calculate

Building a deck is one of the most popular home improvement projects in the United States, consistently ranking among the highest in cost recovery at resale. A well-built deck adds functional outdoor living space and creates an immediate visual focal point in the backyard. The total cost of a new deck depends primarily on the deck's footprint — length times width — and the decking material selected. Pressure treated wood is the most affordable option and the industry standard for deck framing regardless of the surface material chosen. It is chemically treated to resist rot and insects, making it suitable for ground contact and long-term exposure. Cedar and redwood are naturally rot-resistant and valued for their beauty and smooth texture, carrying a mid-range price premium. Composite decking — engineered wood-plastic composite boards from brands like Trex, TimberTech, and Fiberon — is the most popular premium option because it resists rot, splinters, fading, and staining without requiring sanding or sealing. It costs more upfront but dramatically reduces annual maintenance costs over a 25-year lifespan. PVC or vinyl decking is fully synthetic, the most moisture-resistant of all options, and ideal for pool decks or high-humidity environments where even composite can absorb moisture at cut ends. Cost per square foot includes both decking material and framing, hardware, concrete footings, ledger attachment to the house, railings, and labor. Permit costs, which vary from a few hundred to over a thousand dollars depending on jurisdiction, are not included but should be budgeted separately. Elevated decks, multi-level decks, and those requiring significant stair runs or privacy screening add cost beyond the base estimate.

How It Works

The deck area is calculated by multiplying length by width in feet. The estimated cost equals the area multiplied by the all-in installed cost per square foot for the selected material: $15 for pressure treated wood, $22 for cedar/redwood, $35 for composite, and $40 for PVC/vinyl. These per-square-foot rates include decking boards, framing lumber, hardware, concrete footings, ledger board, standard railing, and typical labor. The low estimate is 75% of the midpoint and the high is 140%, reflecting the spread from site conditions, deck height, local permit costs, railing complexity, and regional labor rates. Composite and PVC materials also vary significantly by brand — budget composites can be found near the low end, while premium capped composite or cellular PVC runs toward the high end.

Examples

16 × 12 Pressure Treated Wood Deck
A ground-level 192 sq ft deck built with pressure treated lumber — the most common and affordable new deck option.
Result: Estimated range: $2,160 – $4,032. Deck area is 192 sq ft; midpoint is $2,880 at $15/sq ft.
20 × 16 Composite Deck
A 320 sq ft backyard deck built with composite boards — premium look with minimal long-term maintenance.
Result: Estimated range: $8,400 – $15,680. Deck area is 320 sq ft; midpoint is $11,200 at $35/sq ft.

Frequently Asked Questions

Does a deck add value to a home?
Yes. According to Remodeling Magazine's annual Cost vs. Value report, a wood deck addition recovers approximately 65–70% of project cost at resale, and composite deck projects recover slightly less due to higher upfront cost. The actual value added depends on market preferences — in warm-weather markets where outdoor living is year-round, decks and outdoor structures carry higher premiums. Buyers in competitive markets consistently rate outdoor space as a significant factor in purchase decisions.
Do I need a permit to build a deck?
In most US jurisdictions, yes — any deck attached to the house or over a certain height above grade requires a building permit. Permit requirements protect homeowners by ensuring structural plans are reviewed and the deck is inspected at key stages. Unpermitted decks can create liability issues during home sales and may need to be torn down or retroactively permitted. Your deck contractor should be familiar with local requirements and ideally pulls the permit on your behalf.
How long does each decking material last?
Pressure treated wood typically lasts 15–25 years with regular sealing and staining every 2–3 years. Cedar and redwood last a similar length of time and require the same maintenance schedule. Composite decking from major brands carries 25–30 year warranties against fading, staining, and structural failure and requires virtually no maintenance beyond periodic cleaning. PVC/vinyl decking is the most moisture-resistant of all options and can last 30 years or more in humid or wet environments.

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