What is the cheapest decking material in 2026?

Pressure-treated (PT) lumber is the least expensive: $15–$25/sq ft installed. Cedar decking costs $20–$30/sq ft. Composite decking (Trex, TimberTech) costs $40–$70/sq ft installed but needs little maintenance and carries 25- to 50-year limited warranties depending on the product line, vs 10–15 years of typical service for PT wood.

Deck Cost Calculator 2026: Total Build Cost, Labor, Materials and Permits

Q: How much does it cost to build a deck in 2026?

A basic installed deck runs roughly $18–$35 per square foot in pressure-treated wood and $40–$70 in composite. A 12×16 ft (192 sq ft) pressure-treated deck: $3,800–$6,500. A 16×20 ft (320 sq ft) composite deck: $13,000–$22,000. Full-featured builds cost more: Zonda's 2025 Cost vs. Value report puts a 16×20 wood deck addition at $18,263 and a composite one at $25,096 nationally.

Q: Do I need a permit to build a deck?

Under the model IRC (Section R105.2), a deck is exempt from a permit only if it is 200 sq ft or less, no more than 30 inches above grade, not attached to the house, and does not serve a required exit door. Anything else needs a permit, and many jurisdictions are stricter. Fees are set locally. Unpermitted decks can cause issues at home sale and may be required to be torn down.

Q: How long does it take to build a deck?

A professional crew builds a basic 200–400 sq ft deck in 3–7 days. Permitting adds 1–6 weeks to the timeline. DIY builds typically take 3–4 weekends for the same size. Custom features (pergola, stairs, lighting) add 2–5 additional days.

A basic deck costs roughly $18–$35 per square foot installed in pressure-treated wood and $40–$70 in composite. A standard 200 sq ft pressure-treated wood deck runs $4,000–$7,000; a 320 sq ft composite deck costs $13,000–$22,000. Labor is 40–60% of total cost. Use our deck cost calculator for a customized estimate by size, material, and location.

Deck Cost by Size (2026 Estimates)

Deck Size	Sq Ft	Pressure-Treated Wood	Cedar/Redwood	Composite (Trex)
10×12 ft (small)	120	$2,200–$3,800	$3,000–$5,000	$5,000–$7,500
12×16 ft (medium)	192	$3,800–$6,500	$5,000–$8,000	$8,000–$13,000
16×20 ft (large)	320	$6,500–$11,000	$8,500–$14,000	$13,000–$22,000
20×24 ft (XL)	480	$9,500–$16,000	$13,000–$21,000	$20,000–$34,000

Estimates include labor, materials, hardware, and basic permit. Excludes stairs, railings upgrades, pergola, or lighting. Prices vary 20–30% by region.

Cost Breakdown: Where Your Deck Budget Goes

Cost Component	% of Total Cost	Example (16×20 composite)
Decking boards (composite/wood)	25–35%	$4,000–$6,000
Framing lumber and hardware	15–20%	$2,500–$3,500
Labor (contractor)	40–55%	$6,500–$9,000
Concrete footings/posts	5–10%	$800–$1,500
Permit and inspection	2–5%	$200–$600

Deck Material Comparison 2026

Material	Cost/Sq Ft (installed)	Lifespan	Maintenance	Best For
Pressure-treated pine	$15–$25	10–15 years	Stain/seal every 2-3 yr	Budget builds
Cedar	$20–$32	15–20 years	Seal every 2-3 yr	Natural look + mid-budget
Redwood	$25–$40	20–25 years	Seal every 3 yr	Premium natural wood
Composite (Trex/TimberTech)	$40–$70	25–50 yr limited warranties (by product line)	Minimal (wash 2x/yr)	Low maintenance + longevity
PVC/Vinyl	At or above composite	30+ years	Very low	Max durability

Add-On Costs to Budget For

Stairs: $150–$400 per stair step; a standard 4-step stair run adds $600–$1,500
Railings: $150–$600 per linear foot installed (wood vs. cable vs. glass)
Pergola/overhead structure: $3,000–$12,000 depending on size and material
Built-in seating/planters: $500–$2,000
Lighting (LED deck lights): $700–$2,500 installed
Waterproofing (under-deck system): $15–$25/sq ft additional

Deck ROI and Home Value

Decks are one of the better-returning exterior projects. Zonda's 2025 Cost vs. Value report (the 38th edition, national averages for a 16×20 ft deck with railings and stairs):

Wood deck addition: $18,263 job cost, $17,323 added resale value, 94.9% recouped
Composite deck addition: $25,096 job cost, $22,199 added resale value, 88.5% recouped

Those are national figures. Returns swing a lot by metro, so treat them as a direction, not a promise. Note that the report's project cost is higher than the basic-build ranges above because its spec includes railings, stairs and built-in features.

FAQ: Deck Cost 2026

How much does it cost to build a deck in 2026?

Roughly $18–$35 per sq ft installed for pressure-treated wood, $40–$70 for composite. A 12×16 ft wood deck: $3,800–$6,500. A 16×20 ft composite: $13,000–$22,000.

What is the cheapest decking material?

Pressure-treated pine at $15–$25/sq ft installed. Requires staining every 2–3 years; lifespan 10–15 years.

Do I need a permit to build a deck?

Usually, yes. The model IRC (R105.2) only exempts decks that are 200 sq ft or smaller, 30 inches or less above grade, detached from the house and not serving a required exit door. Your local building department sets the fee and may add stricter rules.

How long does it take to build a deck?

Professional crew: 3–7 days for 200–400 sq ft. Permitting: 1–6 weeks additional. DIY: 3–4 weekends.

Sources

Zonda, 38th annual Cost vs. Value report (September 18, 2025) — wood and composite deck addition cost, resale value and percentage recouped.
ICC, IRC 2021 Section R105.2, Work exempt from permit (deck exemption conditions).
Trex, How long does a deck last? — 25 to 50 year limited residential warranties, varying by product line.

Size-based ranges are our own estimates for basic builds and vary 20–30% by region. Last reviewed October 2026.