Deck Cost & Materials Estimator

Decking Calculator

Calculate the total cubic yards required based on length, width, and depth for accurate material estimation.

Length (m) Width (m) Square footage (area)

Select board width (mm) Enter board length (m)

Number of boards Fasteners used
Screws/Nails Hidden clips

Number of screws/nails

Enter cost of one board (PKR) Price of fasteners (PKR) Total cost of fasteners (PKR) Total decking cost (PKR)

Decking Calculator — Deck Cost Estimator

A new deck costs $15 to $35 per square foot installed, or $4,500 to $22,000 for a 300 sq ft deck depending on material, framing complexity, and local labor rates.

Enter your deck dimensions, material type, and features in the estimator above to get a full cost breakdown — decking boards, framing lumber, hardware, labor, and total installed price.Deck quotes vary by $3,000 to $8,000 for the same project between contractors. Use this calculator before requesting quotes — knowing real numbers prevents overcharging and speeds up the bidding process.

How to Use the Decking Calculator

Enter 4 values to get your deck estimate: deck dimensions (length x width), material type, height off ground, and desired features. The calculator returns decking board quantity, framing material, labor estimate, and total project cost.

Select deck material — pressure-treated wood, cedar, redwood, composite, or PVC decking
Enter dimensions — length and width in feet; the calculator converts to square footage automatically
Set deck height — ground-level, raised (under 30 inches), or elevated (over 30 inches requiring stairs and railings)
Add features — built-in benches, pergola, skirting, stairs, railing type, and lighting
Include site prep — ledger attachment to house, concrete footings, post depth based on frost line

Decking Cost by Material Type — 2026 US Averages

Material choice is the single biggest factor in deck cost and long-term maintenance. Each option has different upfront cost, lifespan, and annual maintenance requirements.

Decking Material	Material Cost/sq ft	Total Installed Cost	Lifespan	Maintenance
Pressure-Treated Pine	$2 – $5/sq ft	$15 – $25/sq ft	15–25 years	Annual staining/sealing
Cedar / Redwood	$4 – $8/sq ft	$20 – $35/sq ft	20–30 years	Biennial sealing
Composite (mid-grade)	$6 – $10/sq ft	$25 – $38/sq ft	25–30 years	Occasional cleaning only
Composite (premium)	$10 – $16/sq ft	$35 – $55/sq ft	30+ years	Minimal – no sealing needed
PVC Decking	$9 – $14/sq ft	$30 – $50/sq ft	30–50 years	Wash with soap and water
Tropical Hardwood (Ipe)	$14 – $22/sq ft	$40 – $70/sq ft	40–75 years	Annual oiling required

Deck Cost Per Square Foot — Full Breakdown

Decking material is only part of the total project cost. Framing, hardware, footings, and labor each add to the final number. Every component below should appear in a legitimate contractor quote.

Cost Component	Cost Range	% of Total	Notes
Decking Boards	$2 – $16/sq ft	25 – 40%	Material cost varies widely by species and brand
Framing Lumber	$1.50 – $4/sq ft	15 – 20%	Joists, beams, posts — PT lumber required for ground contact
Concrete Footings	$200 – $600 per footing	8 – 15%	Depth determined by local frost line — do not skip this
Hardware & Fasteners	$0.50 – $2/sq ft	5 – 8%	Hidden fasteners add cost but improve appearance
Railings	$40 – $120 per linear ft	10 – 20%	Code required above 30 inches; cable rail is premium
Stairs	$600 – $1,800 per staircase	5 – 10%	Each step, riser, and landing adds cost
Labor	$8 – $22/sq ft	30 – 45%	Varies by region and complexity — elevated decks cost more
Permits & Inspections	$200 – $1,500	2 – 5%	Required in virtually every jurisdiction for attached decks

Deck Size and Cost Estimates — 2026

These estimates are for a composite mid-grade deck at grade level with standard railings. Add 15–25% for elevated decks; add 10–20% for premium materials.

Deck Size	Square Footage	Pressure-Treated	Composite (mid)	PVC / Premium Composite
10 x 12 ft	120 sq ft	$2,500 – $4,500	$4,000 – $6,500	$5,500 – $9,000
12 x 16 ft	192 sq ft	$3,500 – $6,000	$5,500 – $9,000	$7,500 – $13,000
16 x 20 ft	320 sq ft	$5,500 – $9,500	$9,000 – $14,500	$12,000 – $20,000
20 x 24 ft	480 sq ft	$8,000 – $14,000	$13,500 – $21,000	$18,000 – $30,000
20 x 30 ft	600 sq ft	$10,000 – $17,000	$17,000 – $26,000	$23,000 – $38,000

Deck Add-On Costs — Features and Upgrades

Feature / Add-On	Added Cost	Notes
Built-in seating / benches	$400 – $1,200	Per bench section; adds storage option with hinged seats
Pergola (attached)	$4,000 – $12,000	Adds shade and visual framing; increases property value
Outdoor lighting (string/recessed)	$500 – $2,500	Low-voltage recessed stair lights are popular and code-safe
Skirting / under-deck panels	$1,500 – $4,500	Hides framing; deters animals; improves visual finish
Cable railing system	$150 – $220 per linear ft	Premium look; requires tensioning hardware and post upgrades
Composite fascia boards	$3 – $8 per linear ft	Wraps framing ends; cleaner appearance than exposed lumber
Composite deck tiles (floating)	$3 – $9 per sq ft	No permit needed for freestanding; easy DIY option

Wood vs Composite vs PVC Decking — Detailed Comparison

	Pressure-Treated Wood	Composite Decking	PVC Decking
Upfront Cost (installed)	$15 – $25/sq ft	$25 – $55/sq ft	$30 – $50/sq ft
Lifespan	15–25 years	25–30 years	30–50 years
Annual Maintenance	Stain/seal annually	Clean with mild soap	Wash with soap and water
Splinters / Rough Surface	Yes — sands over time	No — smooth finish	No — smooth finish
Fade Resistance	Greys over time	Good (capped composite)	Excellent — UV stabilized
Moisture Resistance	Moderate — can warp	Good — resists rot	Excellent — 100% waterproof
DIY Friendly	Yes	Moderate	Moderate
Best For	Budget builds, rural areas	Most homeowners	Pool decks, coastal climates

Deck Permits and Code Requirements

Most jurisdictions require a building permit for attached decks and any deck over 30 inches above grade. Skipping permits creates problems at resale and voids contractor warranties.

Permit required for all attached decks and decks over 200 sq ft in most states
Frost line footings — concrete piers must extend below local frost depth (12 to 48 inches depending on region)
Railing required for all decks 30 inches or higher above grade; minimum 36 inches high (42 inches in commercial)
Baluster spacing must prevent a 4-inch sphere from passing through — this is a child safety code
Ledger board attachment must use through-bolts or structural screws into the rim joist — not nails
Stair handrails required for any staircase with 4 or more risers

How to Hire a Decking Contractor

Verify general contractor or specialty deck builder license — required in most states
Ask for proof of liability insurance and workers compensation — essential for elevated work
Review the lumber and material spec sheet — every board grade and brand should be listed
Confirm footing depth matches local frost line — any contractor skipping this is a red flag
Get a payment schedule tied to project milestones — never pay more than 30% upfront
Confirm the contractor pulls all permits — never accept unpermitted deck work

Frequently Asked Questions

How much does a 12x16 deck cost?

A 12×16 deck (192 sq ft) costs $3,500 to $6,000 in pressure-treated wood, $5,500 to $9,000 in composite, and $7,500 to $13,000 in PVC or premium composite. These are total installed costs including framing, footings, railings, and labor.

Is composite decking worth the extra cost?

Composite decking costs 50 to 100% more upfront than pressure-treated wood but eliminates annual staining and sealing costs of $300 to $800 per year. For most homeowners, composite pays for itself within 8 to 12 years in saved maintenance time and material costs. For high-traffic, pool-adjacent, or coastal decks, composite is the practical choice.

How many deck boards do I need?

For a 16×20 ft deck (320 sq ft) using standard 5/4×6 boards, you need approximately 115 to 125 boards at 16 feet long, accounting for spacing and waste. The calculator above automatically computes board quantity, spacing, and waste factor based on your dimensions and board width.

Do I need a permit for a deck?

Yes, in most US jurisdictions. Any attached deck, any deck over 30 inches above grade, or any deck over 200 square feet typically requires a building permit. Your contractor should pull all permits before breaking ground. Unpermitted decks create problems during home sales and void structural warranties.