How long does deck installation take?

A 200–300 sq ft deck typically takes 3–5 days to build. Larger or more complex decks (multiple levels, stairs, built-in seating) can take 1–2 weeks. Permit processing time varies by municipality and may add 1–4 weeks before construction begins.

Deck Addition Cost 2026: Build or Replace a Deck

Q: How much does a deck cost?

A new deck costs $8,000–$35,000 in 2026 depending on size and material. A 200 sq ft pressure-treated deck averages $8,000–$12,000. A 400 sq ft composite deck runs $20,000–$35,000. Hardwood (Ipe or cedar) decks cost $25,000–$50,000+.

Q: Is composite decking worth the extra cost?

Composite decking costs 2–3x more than pressure-treated wood upfront but requires almost no maintenance — no staining, sealing, or annual treatments. Over a 10–15 year period, composite typically costs less than wood when maintenance expenses are included. It also resists rot, warping, and insects.

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

Most municipalities require a permit for decks attached to the house or elevated more than 12–18 inches off the ground. Ground-level freestanding decks under a certain size may be exempt. Always check local codes — unpermitted decks can cause issues when selling your home.

Updated May 2026 · Based on US regional contractor pricing data

Quick Answer: $8,000 – $35,000+ A 200 sq ft pressure-treated deck averages $8,000–$12,000. A 400 sq ft composite deck runs $20,000–$35,000. Hardwood decks start at $25,000.

Deck Cost by Material

Material	Cost per Sq Ft (installed)	Maintenance	Lifespan
Pressure-Treated Pine	$20–$35	Stain/seal every 2–3 yrs	15–20 yrs
Cedar / Redwood	$30–$55	Seal every 1–2 yrs	20–30 yrs
Composite (mid-grade)	$45–$70	Minimal — annual cleaning	25–30 yrs
Composite (premium)	$65–$95	Minimal — annual cleaning	30–50 yrs
Hardwood (Ipe, Tigerwood)	$60–$110	Oil annually	40–75 yrs
Aluminum	$70–$120	None	50+ yrs

Deck Cost by Size

Deck Size	Pressure-Treated	Composite
10×12 (120 sq ft)	$4,000–$6,500	$7,000–$12,000
12×16 (192 sq ft)	$6,000–$10,000	$12,000–$18,000
16×20 (320 sq ft)	$10,000–$16,000	$18,000–$28,000
20×24 (480 sq ft)	$14,000–$22,000	$26,000–$40,000

Add-On Costs

Feature	Typical Add-On Cost
Built-in bench seating	$500–$1,500
Pergola or shade structure	$3,000–$12,000
Stairs (per flight)	$1,000–$3,000
Railing (per linear ft)	$50–$150
Under-deck drainage system	$3,000–$8,000
Electrical / lighting	$500–$2,500

Frequently Asked Questions

Is composite decking worth the extra cost?

Over 15–20 years, composite decks often cost less than wood when you factor in staining, sealing, and board replacement. They also hold color better and resist rot, mold, and insects. If you plan to stay in your home long-term, composite is typically the smarter investment.

Do I need a permit to build a deck?

Yes in most jurisdictions, especially for attached decks or those elevated more than 18 inches. Permits typically cost $200–$600. Always verify with your local building department — your contractor should handle the application.

What is the ROI on adding a deck?

Decks typically return 60–75% of their cost at resale. A $15,000 pressure-treated deck may add $9,000–$11,000 in home value. Composite decks return slightly less in dollar terms but may be more attractive to buyers.

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