Deck Cost Calculator

Deck Cost by Decking Material

Decking is the one line where the material you pick moves the whole number. Everything under it — joists, beams, posts, footings — is the same pressure-treated lumber whatever you walk on. These are all eight boards this calculator prices, on the same 16 x 20 ft deck at national baseline pricing.

The jump from pressure-treated to composite is the decision most people are actually making, and the sticker price understates it: PT needs cleaning and re-sealing every two to three years and boards start cupping around year ten, while composite needs washing. Ipe is the outlier on this list — it is genuinely a 40-year board, but it eats carbide blades, every hole has to be pre-drilled, and it wants hidden fasteners rated for hardwood.

Deck Cost by Height Above Grade

Elevation is the lever people forget. A deck two feet off the ground and the same deck twelve feet up have identical decking and identical railing — what changes is the post length, the footing, the bracing, and how much of the crew's day goes into working off ladders and staging.

Anything over about 30 inches needs guardrail by code in most jurisdictions, and a second-storey deck needs a properly flashed ledger bolted into the rim joist — the single most common failure point in residential decks and the reason inspectors look there first.

What Railing and Labor Add to a Deck

Both of these are checkboxes on the free calculator, and between them they are the largest swing a homeowner controls. Unticking either one is a real decision, not a display option.

Skipping railing is only an option on a deck low enough not to need one. Building the frame yourself and hiring out nothing is where the money is, but the ledger, the footings and the beam-to-post connections are the parts that carry people — if you are going to hire one thing, hire that.

Bill of Materials for a 16 x 20 ft deck

What the takeoff actually orders for the worked deck above, at the schema-default framing, posts and footings. Quantities include the standard waste factor where the engine applies one.

Deck Cost by Metro Area

These are the complete regional factors this calculator applies — not a selection. Type the ZIP in the second column into the ZIP field above and the calculator prices your own deck at that factor. The cost column is the same 16 x 20 ft deck used throughout this page, so the rows are comparable to each other and to the national $7,300.

Decking boards ship nationally and price within a narrow band; framing lumber and carpenter time do not. If your ZIP is not in the list the calculator prices at the national baseline rather than guessing.

How This Estimate Is Calculated

The deck calculator prices every component the way a deck builder's takeoff does, then totals them. These are the exact steps the engine runs on your inputs:

1. Decking: deck area × (1 + 10% waste) × the material rate — from $3.00/sq ft for pressure-treated pine up to $28.00/sq ft for aluminum.
2. Structure: framing at $1.50–$8.00/sq ft by frame material (scaled by deck height), footings at one per 8×8 ft grid plus two ledger-end footings at $45.00 each, posts at $15.00–$85.00 each, and hardware at $1.25/sq ft for hangers, caps, and fasteners.
3. Railing and stairs: railing runs along the perimeter minus the house side at $25.00–$200.00 per linear foot by material; stairs are priced per riser at $120.00, scaled for widths over 36 inches.
4. Labor: deck area × the material's labor rate ($8.00–$21.00/sq ft), scaled by the height multiplier — ground-level decks get a 0.85 discount, second-story decks cost 2.0×.
5. Permit and region: a building-permit fee is estimated from the project valuation using the published UBC fee schedule, and every line is scaled by your ZIP code's regional multiplier. The final range brackets the total at −20% to +35%.

Data Sources

• Labor benchmarks: U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics (OEWS), May 2025 estimates — Carpenters (SOC 47-2031), national median $29.12/hour ($60,580/year), and Construction Laborers (SOC 47-2061), national median $22.66/hour. Dataset last retrieved June 2026.
• Material unit prices: 2025–2026 national retail averages for decking delivered; composite and cedar rates re-calibrated to 2026 pricing. Last reviewed: September 2026.
• Permit fees: Uniform Building Code valuation-based fee schedule, applied to the regionally adjusted project value.
• Regional adjustments: construction cost indices built from BLS wage data and published industry surveys, covering 24 states and 28 metro areas against a 1.00 national baseline.

What Changes a Deck Estimate: Waste, Height, and Region

Labor is 35% of the worked example above, so location moves the bottom line. See state-specific deck costs:

Deck Cost FAQ

Related Calculators