Deck area
1 sections

Add sections for L-shaped or multi-level decks. Each section is a rectangle.

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Total sq ft
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Board lin ft needed
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Sq ft w/ overage
Decking layout & fasteners
Board layout

Diagonal: +15% material · Herringbone: +20% material & more labor.

Board width
Fastener type

Face screws: ~$0.10–$0.15/LF · Hidden clips recommended for composite & PVC.

Fastener cost ($ / lin ft of decking)
Overage
Perimeter lin ft

Used for fascia boards and railing. Auto-estimated from sections; adjust as needed.

Framing & structure
Joist spacing

12" OC required for diagonal or herringbone decking layouts.

Joist size
Framing cost ($ / sq ft of deck)

Includes joists, beams, ledger, rim joist, and joist hangers. PT lumber: ~$4–$7/SF of deck.

Deck posts
4

6×6 PT posts. Count support posts under deck (not railing posts).

Post material cost ($ / post)

6×6×10 PT post: ~$30–$45.

Concrete per post (60 lb bags)
Concrete cost ($ / bag)
Fascia boards
Finish boards covering the rim joist — often a premium or matching board
Fascia cost ($ / lin ft)

Match to decking material. Composite fascia: ~$4–$8/LF. IPE: ~$10–$14/LF.

Railing
Posts, balusters, top & bottom rail
Railing linear feet

Perimeter minus house side. Open sides and stair sections only.

Railing height
Railing style
Railing cost ($ / lin ft)

Wood PT: ~$15–$25/LF · Composite: ~$25–$45 · Cable: ~$80–$150 · Glass: ~$150–$250/LF installed.

Railing continues on stairs
Adds stair rail length based on stair section below
Stairs
Stringers, treads, and risers
Number of steps 4
120
Stair width 4 ft
3 ft10 ft
Tread material
Stair cost ($ / step)

Per step including stringers, treads, and risers. ~$65–$120/step typical.

Labor — professional installation
Decking installation per sq ft (framing labor billed separately)
Decking labor ($ / sq ft)

PT typical: $5–$9/SF · Composite/PVC: $7–$12 · IPE: $10–$16 (pre-drilling required).

Framing labor ($ / sq ft)

Framing, post-setting, and ledger attachment: ~$6–$12/SF.

Railing labor ($ / lin ft)

Wood / aluminum railing: ~$12–$25/LF labor. Cable or glass: higher.

Stair labor ($ / step)
Building permit allowance
Most jurisdictions require a permit for attached decks — typically 1–2% of project value
Permit fee ($)

Typical residential deck permit: $200–$700. Complex or larger projects may be higher.

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Deck sq ft
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Board lin ft
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Materials
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Est. total
Cost breakdown
Decking boards—
Framing & posts—
Total estimate—
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Board lin ft
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Joists needed
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Concrete bags

Board count includes selected overage · Joist count based on longest deck dimension ÷ spacing + 1 · Quantities rounded up · Prices exclude tax and delivery