Cost to Build a Deck in 2026: By Material, Size, and Story Height
Building a standard 12×16 deck costs $4,800 to $8,200 in pressure-treated wood or $7,700 to $15,000 in composite professionally installed in 2026. Per square foot, expect $25 to $45 for PT wood and $40 to $80 for composite decking. The cost to build a deck depends on material, square footage, elevation (ground-level vs second-story), railing type, and whether stairs are included.
A deck is one of the most-used outdoor improvements a homeowner can make, and return on investment data consistently places it among the top exterior projects. The National Association of Realtors Remodeling Impact Report estimates that a new wood deck recoups roughly 80 percent of its cost at resale, and composite decking recoups 60 to 70 percent. More practically: a usable, well-built deck changes how a household uses outdoor space for the life of the home.
The deck cost calculator estimates material and labor for any deck size, material type, and elevation.
Open the Deck Calculator →Deck Build Cost by Decking Material in 2026
| Decking material | Installed cost per sq ft | Lifespan | Maintenance |
|---|---|---|---|
| Pressure-treated pine (PT) | $25 to $45 | 15 to 25 yrs | Stain/seal every 2-3 yrs; board replacement |
| Cedar / redwood | $30 to $55 | 20 to 30 yrs | Seal every 2-3 yrs; more stable than PT |
| Composite (Trex, TimberTech) | $40 to $80 | 25 to 50 yrs | Annual wash; no sealing or staining |
| PVC decking | $45 to $85 | 30 to 50 yrs | Wash only; never stains or splinters |
| Ipe / tropical hardwood | $50 to $90 | 40 to 75 yrs | Oil annually; extremely dense and durable |
| Aluminum decking | $55 to $95 | 50+ yrs | None; never rots, warps, or splinters |
Deck Build Cost by Size in 2026
| Deck size | Square footage | PT wood installed | Composite installed |
|---|---|---|---|
| 10×10 (small) | 100 sq ft | $3,000 to $5,500 | $5,000 to $9,000 |
| 12×16 (standard) | 192 sq ft | $4,800 to $8,200 | $7,700 to $15,000 |
| 14×20 (medium) | 280 sq ft | $7,000 to $12,000 | $11,200 to $21,000 |
| 16×24 (large) | 384 sq ft | $9,600 to $16,500 | $15,400 to $30,000 |
| 20×30 (XL) | 600 sq ft | $15,000 to $26,000 | $24,000 to $46,000 |
Elevated vs Ground-Level Deck Cost
An elevated deck (second-story or high-elevation attached deck requiring posts 6 feet or taller, or a deck over a slope) costs 25 to 60 percent more than an equivalent ground-level deck because of additional structural requirements: longer posts with deeper concrete footings, diagonal bracing for lateral stability, and increased labor time for working at height. An 8-foot elevation deck requires special engineering in many jurisdictions and frequently triggers a structural engineer review as part of the permit process. The railing height requirement also increases at higher elevations: most codes require 42-inch railings rather than the 36-inch minimum for decks under 30 inches off the ground. For patio alternatives to an elevated deck, our concrete patio cost guide covers at-grade hardscape options. For retaining walls that allow patio-level access on a sloped lot, our retaining wall cost guide covers that structural option.
Deck Permit and Inspection Requirements
A permit is required for virtually every attached deck in the United States. The permit triggers inspection of the footing depths (frost depth varies by climate zone: 12 inches in Florida, 48 inches in Minnesota), the ledger connection to the house (the most common structural failure point on decks), the beam-to-post connections, and the railing height and baluster spacing. The building department inspection catches framing errors before the decking surface covers the structure. Decks built without permits are a liability issue at resale: buyers’ inspectors identify unpermitted decks, which require retroactive permitting, inspection, and potentially correction. Permit cost: $50 to $400 depending on jurisdiction and deck value. Structural engineer review for elevated or complex decks: $500 to $1,500.
Three Real Deck Build Projects
Example 1: Composite deck on a second-story walkout in Raleigh, North Carolina
A homeowner building a 14×18 composite deck off a second-story sliding door on a 1990s split-level home. Elevation: 9 feet. Required: structural engineer review for the post and beam sizing at that elevation, diagonal bracing, and 42-inch railing. Permit: $185. Engineered footing design: $680. Framing (posts, beams, joists, ledger): $4,200 in labor and PT lumber. Composite decking (Trex Select): $3,800 in material. Composite railing system: $2,400. Two stair sections to grade: $1,800. Total: $13,065. The elevated deck cost 45 percent more per square foot than an equivalent ground-level composite deck because of the structural engineering, extended posts and footings, and the elevated framing labor.
Example 2: Ground-level pressure-treated deck in Columbus, Ohio
A homeowner building a 16×20 PT deck off a rear door at grade level (deck surface 18 inches above grade; no railing required by code below 30 inches, though the homeowner added one for safety). Footings: 8 concrete tube forms at 42-inch depth (Ohio frost line). Framing and PT decking: $7,200 combined materials and labor. Railing (pressure-treated post-and-rail): $1,200. Two steps down to grade: $480. Permit: $120. Total: $9,000. Staining at initial installation (semi-transparent penetrating stain, 3 gallons, DIY): $95. The homeowner got three quotes ranging from $8,400 to $14,200; the high quote used composite decking the homeowner had not requested. Verifying that all three quotes used the same material allowed accurate comparison.
Example 3: Ipe hardwood deck in Seattle, Washington
A homeowner building a 12×14 ipe hardwood deck (168 sq ft) as a permanent, low-maintenance outdoor living space. Seattle climate is ideal for ipe: the species is naturally mold- and rot-resistant without treatment, critical in the Pacific Northwest. Ipe decking material: $3,780. PT framing and footings: $2,900 (labor and material). Hidden fastener system (ipe clips): $380. Cable railing (stainless, through aluminum posts): $2,800. One stair section: $640. Permit: $160. Total: $10,660. At $63.50 per sq ft, this was at the high end of the ipe range but represented a projected 40-year lifespan with minimal maintenance, making the lifetime cost competitive with a PT deck replaced twice over the same period at today’s material and labor prices.
The deck calculator estimates material and labor for any size, material, and elevation before you request quotes.
Calculate Deck Cost →Frequently Asked Questions About Deck Build Cost
How much does it cost to build a deck?
Building a standard 12×16 deck costs $4,800 to $8,200 for pressure-treated wood or $7,700 to $15,000 for composite decking, professionally installed in 2026. Cost per square foot ranges from $25 to $45 for PT wood and $40 to $80 for composite. Elevated decks (second-story or high-elevation) cost 25 to 60 percent more because of additional structural requirements. Permit, footings, framing, decking, railing, and stairs are all included in complete installed quotes; always verify what is and is not included before comparing contractor bids.
Is composite decking worth the extra cost over pressure-treated wood?
Composite decking costs 50 to 80 percent more upfront than PT wood but requires no ongoing maintenance (no staining, sealing, or board replacement for 25 to 50 years). Over a 25-year period, PT wood decks require 8 to 12 rounds of staining ($300 to $600 per round DIY or $600 to $1,200 professional) plus likely some board replacement; total maintenance cost: $3,000 to $8,000. Composite decking’s lifetime maintenance cost: essentially $0 beyond washing. For homeowners planning to stay in the home long-term, composite often wins on 20-year total cost. For short-term owners (under 7 years), PT wood’s lower upfront cost is typically the right choice.
Do I need a permit to build a deck?
Yes, in virtually all US jurisdictions. Attached decks that connect to the house structure require a permit that inspects the ledger connection, footing depth, beam sizing, and railing compliance. Even freestanding decks over a certain size (commonly 200 sq ft) require permits in most municipalities. Decks built without permits cannot be inspected for structural compliance, create liability issues at resale, and may require removal or retroactive permitting if discovered by a buyer’s inspector. Always pull a permit for deck construction.
How deep do deck footings need to be?
Deck footings must extend below the local frost depth to prevent frost heave from lifting and shifting the deck structure. Frost depths by region: Southern states (Florida, Georgia, Texas): 12 inches; Mid-Atlantic and Pacific Coast: 18 to 24 inches; Midwest (Ohio, Illinois): 36 to 42 inches; Northern states (Minnesota, Michigan): 42 to 48 inches; Mountain West: 36 to 48 inches depending on elevation. Your building permit inspector will specify the required frost depth for your location. Footings that do not reach frost depth are the most common structural deficiency found on unpermitted deck inspections.
How long does a deck last?
Pressure-treated pine decking lasts 15 to 25 years with regular sealing; the structural framing (also PT) typically lasts longer. Cedar and redwood deck boards last 20 to 30 years. Composite decking from major manufacturers (Trex, TimberTech) is warranted for 25 to 50 years and typically lasts as long with no significant surface degradation. Ipe and tropical hardwood decking lasts 40 to 75 years. The limiting factor on deck lifespan is usually the decking boards and railings, not the structural framing, which is protected by pressure treatment from the factory.
Can I build a deck myself?
A ground-level attached deck is one of the most achievable major DIY projects for a homeowner with basic carpentry skills, a miter saw, drill, and circular saw. DIY deck framing and decking saves $8 to $18 per square foot in labor on a standard ground-level deck. The non-negotiable requirements for DIY: pull the permit, have the footing depth and ledger connection inspected before covering, and follow the code for railing height and baluster spacing exactly. Elevated decks (over 30 inches) and complex multi-level decks require higher precision structural work that most DIYers should hire a professional for.
What is the best decking material?
The best decking material depends on priorities. For lowest upfront cost: pressure-treated pine. For lowest lifetime cost with no maintenance: composite (Trex, TimberTech, Fiberon). For natural appearance with good durability: cedar or redwood. For maximum durability in harsh climates: ipe or composite. For allergy to splinters and maximum hygiene: PVC or aluminum decking. For most homeowners in most climates, composite decking in the mid-range product tier represents the best balance of upfront cost, appearance, and zero-maintenance performance over 25 to 50 years.
How much does a deck railing cost?
Deck railing cost per linear foot installed in 2026: pressure-treated wood post-and-rail ($15 to $30), aluminum (Fortress, TIVA) ($30 to $60), composite railing (Trex, TimberTech) ($40 to $80), cable railing with aluminum or stainless posts ($60 to $150), glass panel railing ($80 to $200). Railing is required on decks with a drop of 30 inches or more; most jurisdictions require 36-inch minimum railing height (42 inches for commercial and higher-elevation residential decks) and baluster spacing of 4 inches or less to prevent a 4-inch sphere from passing through.
Related Calculators and Guides
For deck construction standards and ledger attachment requirements, the American Wood Council DCA 6 Prescriptive Residential Wood Deck Construction Guide is the widely-adopted standard referenced by most US building departments. For composite decking product standards, the North American Deck and Railing Association (NADRA) provides contractor certification and consumer guidance.