Deck Cost Calculator
Get a complete installed-cost estimate for your new deck based on square footage, material choice, and structural complexity. Pricing reflects 2026 national averages.
Recommended products for this project
As an Amazon Associate we earn from qualifying purchases. Affiliate disclosure.
Outdoor Solid Composite Decking Boards 96"x5.43"x1", Polymer Composite Decking for All Weather Use,Poolside,Backyard,Patio(6 Pcs,Redwood and Maple,21.72sqft)
View on Amazon
8 Pcs ABS Deck Spacer Tool, 4 Thicknesses Deck Board Spacers (1/16", 1/8", 3/16", 1/4") for Pressure Treated Lumber, Composite Decking, PVC & Hardwood Boards
View on Amazon
Ultimate Guide: Decks, Updated 6th Edition: Plan, Design, Build (Creative Homeowner) DIY Your Own Deck - Expert Installation Tips, Building Techniques, Step-by-Step Instructions, and Over 700 Photos
View on Amazon
Outdoor Solid Composite Decking Boards 96"x5.43"x1", Polymer Composite Decking for All Weather Use,Poolside,Backyard,Patio(6 Pcs,Rosewood and Light Grey,21.72sqft)
View on AmazonWhat actually drives the cost of a new deck
The average American homeowner spends between $4,500 and $15,000 on a new deck in 2026, but the range is so wide because five variables dominate every quote: square footage, material choice, height off the ground, complexity of the shape, and regional labor rates. A 12×16 pressure-treated deck at ground level might come in at $22 per square foot installed, while an identical footprint built four feet up with premium composite and cable railings can push $75 per square foot. The calculator above accounts for the two biggest levers — size and material — and applies a complexity multiplier so you can see the range you should expect in a competitive local quote.
How the estimate breaks down
On a typical deck build, roughly 55% of the total cost is materials, 35% is labor, and the remaining 10% covers hardware, permits, and small consumables like flashing, ledger bolts, and joist hangers. That split shifts significantly on a DIY build (labor drops to near zero) or on a premium composite install (material climbs above 60%). If a contractor quote comes back with material listed below 40% of the total, that's a signal they're marking up labor aggressively or under-specifying the framing — worth pushing back on.
Costs the calculator doesn't include
Several line items regularly surprise homeowners: demolition of an existing deck ($500–$1,500), hot tub reinforcement ($800–$2,000), gas or electrical stub-outs ($400–$1,200 each), upgraded railings (aluminum runs 2× wood, cable runs 3–4×), and tree or slope work to prepare the site. For a full-scope budget, add 8–15% to the calculator's mid-point for these extras.
How to save 15–25% on your build
The single biggest lever is timing: contractors in most regions discount 10–20% for fall and late-winter builds versus the May–July peak. Beyond timing, three tactics reliably lower the bill without cutting quality — pick a rectangular footprint over multi-level or curved shapes, use pressure-treated framing under a composite surface (framing doesn't need to be visible), and source your own decking directly from a lumberyard rather than through the contractor's markup. Together these can shave $2,000–$4,000 off a $12,000 project.
Getting an accurate contractor quote
Use the calculator's range as your baseline, then get at least three written quotes with itemized material specs, joist spacing, footing size, and warranty terms. A quote that's 25% below the range shown here almost always means the framing or footings are undersized — most common failure point on cheap decks. See our deep-dive on deck cost by size and material for a full teardown of contractor markups and how to negotiate them down.
2026 deck cost by size (installed)
These are the installed price ranges homeowners are quoted in 2026 for a standard single-level deck with railings and one set of stairs. Materials, labor, hardware, and permits are included; demolition, hot-tub framing, and electrical are not.
| Deck size | Sq ft | Pressure-treated | Cedar | Composite | PVC |
|---|---|---|---|---|---|
| 10 × 10 ft | 100 | $1,980 – $2,530 | $2,880 – $3,680 | $4,320 – $5,520 | $5,220 – $6,670 |
| 10 × 12 ft | 120 | $2,376 – $3,036 | $3,456 – $4,416 | $5,184 – $6,624 | $6,264 – $8,004 |
| 12 × 12 ft | 144 | $2,851 – $3,643 | $4,147 – $5,299 | $6,221 – $7,949 | $7,517 – $9,605 |
| 12 × 16 ft | 192 | $3,802 – $4,858 | $5,530 – $7,066 | $8,294 – $10,598 | $10,022 – $12,806 |
| 14 × 20 ft | 280 | $5,544 – $7,084 | $8,064 – $10,304 | $12,096 – $15,456 | $14,616 – $18,676 |
| 16 × 16 ft | 256 | $5,069 – $6,477 | $7,373 – $9,421 | $11,059 – $14,131 | $13,363 – $17,075 |
| 16 × 20 ft | 320 | $6,336 – $8,096 | $9,216 – $11,776 | $13,824 – $17,664 | $16,704 – $21,344 |
| 20 × 20 ft | 400 | $7,920 – $10,120 | $11,520 – $14,720 | $17,280 – $22,080 | $20,880 – $26,680 |
2026 deck cost by material (per square foot)
Material choice moves the total more than any other decision. The per-square-foot numbers below are installed averages — roughly 55% material, 35% labor, 10% hardware and permits. DIY builders can usually subtract the labor share.
| Material | Installed $/sq ft | 12 × 16 deck | Typical lifespan | Upkeep |
|---|---|---|---|---|
| Pressure-Treated Pine | $22 | $3,802 – $4,858 | 15–20 yrs | Seal every 2 yrs |
| Cedar | $32 | $5,530 – $7,066 | 15–25 yrs | Stain every 2–3 yrs |
| Redwood | $38 | $6,566 – $8,390 | 20–30 yrs | Stain every 2–3 yrs |
| Composite (Trex/TimberTech) | $48 | $8,294 – $10,598 | 25–30 yrs | Wash annually |
| PVC / Cellular | $58 | $10,022 – $12,806 | 30–50 yrs | Wash annually |
| Ipe / Tropical Hardwood | $65 | $11,232 – $14,352 | 40–75 yrs | Oil annually (optional) |
How to use this deck cost calculator
- Measure the footprint. Length × width in feet, measured to the outside of the rim joists.
- Pick the decking material. This is the biggest cost lever — swap between options to see the spread instantly.
- Set complexity. A simple rectangle at ground level is cheapest; multi-level, curves, and built-in benches add 20–40%.
- Hit Calculate and read the range, not the mid-point. Bring the range to three local contractors.
Deck cost FAQs contractors get asked most
Is labor really a third of the job? On a standard install, yes — 30–40%. On a hillside build with tall posts or a deck over a finished space, labor can pass 50%.
Why is my quote higher than the calculator? Three usual reasons: demolition of an old deck, footings deeper than 36" in cold climates, or upgraded railing. Each can add $1,000–$3,000 on a mid-size deck.
Does a deck add value? Wood decks return roughly 60–70% of cost at resale and composite around 55–65% — run your own numbers in the deck ROI calculator.
Get the Smart Decking Calculator app
Estimate decks on the go, save projects, and share with contractors.
Building something else? Try our sister calculators
Smart Fencing Calculator
Estimate fence cost by material and linear footage.
Smart Roofing Calculator
Free roof replacement cost estimates by material.
Smart Drywall Calculator
Android app — drywall sheets, mud, and tape estimates.
Smart Fencing Calculator
Android app — fence cost estimates on the go.
Frequently asked questions
- What is the average cost of a deck?
- Most homeowners spend $4,500–$15,000, or roughly $30–$60 per square foot installed depending on materials.
- How accurate is this calculator?
- Estimates are based on 2026 national pricing. Local quotes typically fall within ±15% of the range shown.
