Composite decking cost is one of the most-misquoted numbers in home improvement. Big-box price stickers show $4 per linear foot for entry-level boards, which gets confused with installed prices. The actual delivered cost — boards plus framing plus labor plus fasteners plus permit — runs $30 to $60 per sq ft for typical projects, and goes higher for high-end product or complicated layouts. Understanding the full breakdown is the only way to budget realistically.
Part of our Decks & Outdoor guide — explore the full guide →
Material Cost by Tier
Composite decking splits into three quality tiers, each with a price band:
- Entry capped composite — $4 to $7 per linear foot (Trex Enhance Basics, TimberTech EDGE, Fiberon Sanctuary)
- Mid-range capped composite — $7 to $11 (Trex Transcend, TimberTech AZEK Vintage, Fiberon Concordia)
- Premium PVC and capped polymer — $11 to $18 (TimberTech AZEK Harvest, Fiberon Paramount, Deckorators Voyage XT)
For a 200 sq ft deck using 5/4×6 boards on 16-inch joist centers, you need about 380 linear feet of decking. That’s $1,500 to $2,700 in entry-level boards, $2,700 to $4,200 in mid-range, and $4,200 to $6,800 in premium PVC. Order 10 percent overage for cuts and waste.
Full Installed Cost Breakdown
Here’s a complete material and labor breakdown for a 12×16 (192 sq ft) attached deck with a single set of 4 stairs and a 36-inch railing:
| Pressure-treated framing (joists, beams, ledger) | $700 to $1,200 |
| Concrete footings + post bases | $300 to $500 |
| Hardware (joist hangers, lag screws, fasteners) | $200 to $400 |
| Composite decking boards (mid-range) | $2,700 to $4,200 |
| Hidden fasteners + face screws | $200 to $350 |
| Composite or aluminum railing kit | $1,500 to $4,000 |
| Stairs (stringers + treads + risers) | $400 to $900 |
| Permit fees | $150 to $500 |
| Labor (18-25 hours @ $50-90/hr) | $3,500 to $8,000 |
| Total installed | $9,650 to $20,050 |
That’s $50 to $104 per sq ft installed for the deck floor including everything. Per-sq-ft numbers below $40 typically exclude something — railing, stairs, footings, or labor.
Project Size Examples
Composite decking cost scales non-linearly. Footings, permits, ledger work, and crew mobilization are nearly fixed costs that small decks absorb at higher per-sq-ft rates:
- 10×10 (100 sq ft) freestanding — $4,500 to $8,500 ($45 to $85 per sq ft)
- 12×16 (192 sq ft) attached — $9,650 to $20,050 ($50 to $104 per sq ft)
- 16×20 (320 sq ft) attached with stairs and partial roof — $14,000 to $32,000 ($44 to $100 per sq ft)
- 20×30 (600 sq ft) elevated with multi-level transitions — $30,000 to $72,000 ($50 to $120 per sq ft)
Larger decks see economy on materials but pay more for footings, beam sizing, code-required guard rails, and stair count.
Railing Drives Up the Cost
Composite railing is the single biggest cost shock for first-time deck buyers. Cable railing systems run $80 to $200 per linear foot installed. Aluminum picket railings are $50 to $120. Glass-panel systems are $150 to $300. Even basic composite-and-aluminum systems run $30 to $60 per linear foot.
For a 12×16 deck with railing on three sides (44 linear feet), railing costs $1,500 to $13,000 depending on system. Specify the railing tier early — it’s a budget make-or-break.
Hidden Fasteners vs Face Screws
Premium installations use hidden fasteners (TigerClaw, Trex Hideaway, CAMO) that screw into board edges instead of through the surface. Adds $0.30 to $0.80 per linear foot in fastener cost and 4 to 8 hours of labor on a typical deck. The look is cleaner — no visible screw heads — and warranty companies sometimes require hidden fasteners.
Face screws (Cortex, GRK Trim Head) with color-matched plugs cost half as much and install faster, with the trade-off of visible plugs that age slightly differently from the boards.
DIY vs Pro Build
A competent DIYer saves $3,500 to $9,000 in labor on a 200 sq ft deck. The catch: composite decking requires very flat framing, careful expansion gap planning, and specific fastener patterns to honor the manufacturer warranty. Mistakes that pros catch — joist crowning, missed flashing, oversized board gaps — show up after the first winter.
For a first DIY composite build, expect 2 to 3 weekends of work and 10 to 15 percent over-budget on materials due to learning-curve waste. Watch every YouTube video the manufacturer publishes; install patterns are different from old wood-deck habits.
Lifetime Cost vs Wood
Pressure-treated decking lasts 12 to 18 years with annual sealing. Composite lasts 25 to 30 years with no sealing. Over a 30-year horizon, composite costs less per year despite the 2x to 3x upfront premium — pressure-treated requires 1 to 2 board replacements and $1,500 to $3,000 in seal/stain over the same period.
For a 5-year-and-sell timeline, pressure-treated is cheaper. For a 15+ year hold, composite wins on total cost and dramatically on time spent maintaining the deck.
Permits and Hidden Cost Factors
Local permit costs vary significantly. Most jurisdictions charge $150-500 for a residential deck permit, with inspection visits required at footings, framing, and final stages. Skipping permits saves the upfront fee but costs more at resale — buyers’ inspectors flag unpermitted decks, lenders sometimes refuse to fund the mortgage, and homeowner’s insurance may not cover injury on unpermitted structures.
Other often-missed costs: removal of old deck if replacing ($1-3 per sq ft demo), tree trimming or removal if access is constrained ($300-2,000), grading work for footings on sloped sites ($200-1,500), and electrical for outdoor lighting and outlets ($500-3,000 if not already in place). For accurate budget planning, get itemized quotes covering everything from demo to final inspection rather than just material and labor.
