Trex Decking Cost Calculator
Calculate Trex composite deck costs across Enhance, Select, and Transcend product lines with framing, railings, and hidden fasteners.
Trex Decking Cost Calculator
PROJECT SPECIFICATIONS
Length of the deck attached along home or freestanding in feet
Projection distance from home exterior wall in feet
Total perimeter guardrail length in linear feet (leave 0 for low platform deck under 30")
Low-voltage waterproof transformer, illuminated post-cap lights, and stair riser lights
Hidden fastener clips eliminate exposed screw heads and ensure automatic 1/4" board spacing
MATERIAL GRADE SELECTION
REGIONAL LABOR MARKET TIER
SPECIFICATION TAKEOFF & LINE-ITEM BREAKDOWN
Trex Enhance scalloped composite decking boards ($5.20/sq ft) + pressure-treated 2x8 joist substructure, 4x4 posts, and concrete footings ($6.80/sq ft) = $12.00/sq ft material baseline
Carpenter crew: mechanical auger digging of frost footings, concrete pier pouring, ledger board installation with structural ledger screws, 16" OC framing (12" OC diagonal), hidden clip fastening, and perimeter picture-frame borders
Municipal residential building permit, plan review, zoning setback verification, and frost-depth footing inspection
Site grading scrap disposal, pallet recycling, joist cutoffs, and jobsite broom-clean cleanup
Composite post sleeves, caps, top/bottom rails, and powder-coated balusters ($75/LF installed)
Trex Hideaway hidden clips and stainless start clips for seamless screw-free surface ($1.50/sq ft)
| Cost Component | Notes & Rate Basis | Estimated Amount |
|---|---|---|
| Trex Enhance Basics / Naturals & PT Substructure | Trex Enhance scalloped composite decking boards ($5.20/sq ft) + pressure-treated 2x8 joist substructure, 4x4 posts, and concrete footings ($6.80/sq ft) = $12.00/sq ft material baseline Source: [Primary Source] Home Depot — Trex Composite Decking, Railing & Hidden Fasteners • Checked 2026-10-22 Trex Enhance scalloped capped composite deck boards ($5.20/sq ft retail material) plus pressure-treated framing lumber package ($6.80/sq ft baseline). | $4,224 |
| Professional Trade Labor | Carpenter crew: mechanical auger digging of frost footings, concrete pier pouring, ledger board installation with structural ledger screws, 16" OC framing (12" OC diagonal), hidden clip fastening, and perimeter picture-frame borders BLS OEWS May 2024 Carpenters (SOC 47-2031): median $28.51/hr · mean $30.79/hr. Modeled crew wage: $30.80/hr × 0.38 hr/sq ft = $11.70 base wage × 1.0684 burden multiplier = $12.50/sq ft turnkey trade labor. | $4,000 |
| Building Permit & Municipal Inspections | Municipal residential building permit, plan review, zoning setback verification, and frost-depth footing inspection Standard municipal residential building permit and structural plan review fee for residential deck additions ($150–$250 range). | $185 |
| Debris Disposal & Haul-Away | Site grading scrap disposal, pallet recycling, joist cutoffs, and jobsite broom-clean cleanup Jobsite framing scrap disposal, composite cutoff removal, and local transfer station tipping ($0.75/sq ft). | $264 |
| Trex Transcend Composite / Aluminum Railing System | Composite post sleeves, caps, top/bottom rails, and powder-coated balusters ($75/LF installed) Source: [Primary Source] Home Depot — Trex Composite Decking, Railing & Hidden Fasteners • Checked 2026-10-22 Trex Enhance scalloped capped composite deck boards ($5.20/sq ft retail material) plus pressure-treated framing lumber package ($6.80/sq ft baseline). | $3,900 |
| Trex Hideaway Universal Hidden Fastener Clips | Trex Hideaway hidden clips and stainless start clips for seamless screw-free surface ($1.50/sq ft) Source: [Primary Source] Home Depot — Trex Composite Decking, Railing & Hidden Fasteners • Checked 2026-10-22 Trex Enhance scalloped capped composite deck boards ($5.20/sq ft retail material) plus pressure-treated framing lumber package ($6.80/sq ft baseline). | $480 |
| Total Project Estimate | $13,053 | |
What's included in this estimate
- –Demolition and haul-away of existing rotted multi-level deck structure (available as custom demo add-on)
- –Screened porch roof additions, enclosed 3-season sunrooms, or permanent pergola framing
- –Engineered helical metal pier foundations in uncompacted fill soils or steep cliffside slopes
- ·Low-elevation ground platform deck under 30 inches above grade requiring zero guardrails or staircases
- ·Rectangular deck geometry utilizing standard 12-ft, 16-ft, or 20-ft board lengths without diagonal cuts
- ·Trex Enhance scalloped boards fastened with standard composite deck screws
- ·Upgrading to Trex Transcend Lineage boards with heat-mitigating solar core ($11.50/sq ft board material)
- ·Second-story elevated deck requiring 6x6 posts, diagonal cross-bracing, and tall staircases
- ·Trex Transcend composite/aluminum railing packages ($75/linear foot) with integrated LED lighting kits
- ·Curved decking boards requiring heat-blanket thermoforming bending equipment
Installing Trex composite boards over 24" OC joists (common in old wood decks) creates severe board deflection and spongy feel underfoot, and immediately voids manufacturer structural warranty. Joists must be framed @ 16" OC max (12" OC for diagonal patterns).
Failing to leave 1/8" to 1/4" end-to-end and side-to-side expansion gaps leads to severe board buckling and distorted wavy lines when summer direct sunlight raises composite surface temperature above 140°F.
Omitting butyl joist tape (Trex Protect) allows water to pool between composite deck boards and wood joists, causing pressure-treated framing to rot within 10–12 years while composite boards survive 30+ years, necessitating complete premature rebuild.
Check this estimate yourself
Verify our benchmark numbers against the same primary sources we use for materials, labor, and local permitting:
Calculation Formula & Engineering Rules
Our estimating engine calculates required volume or surface area from your project dimensions, applies verified unit material prices, adds trade-standard waste allowances, and adjusts labor, permit, and disposal components for regional economic variations:
Total Cost = Material Costs + [(Labor + Permits + Disposal) ×
Regional Multiplier] Worked Estimating Example: Baseline Specification
ENGINE BASELINE OUTPUTBelow is a fully itemized breakdown for a typical residential project configured with our default baseline dimensions ( 20 ft × 16 ft (320 sq ft deck with 52 LF railing)) using standard national benchmark pricing in an average-cost US market:
| Cost Component | Category | Amount ($) | Share of Total | ||
|---|---|---|---|---|---|
| Cost Component & Scope | Amount · Share | ||||
| materials Trex Enhance Basics / Naturals & PT Substructure Trex Enhance scalloped composite decking boards ($5.20/sq ft) + pressure-treated 2x8 joist substructure, 4x4 posts, and concrete footings ($6.80/sq ft) = $12.00/sq ft material baseline | $4,224.00 · 32.4% | Trex Enhance Basics / Naturals & PT Substructure Trex Enhance scalloped composite decking boards ($5.20/sq ft) + pressure-treated 2x8 joist substructure, 4x4 posts, and concrete footings ($6.80/sq ft) = $12.00/sq ft material baseline | materials | $4,224.00 | 32.4% |
| labour Professional Trade Labor Carpenter crew: mechanical auger digging of frost footings, concrete pier pouring, ledger board installation with structural ledger screws, 16" OC framing (12" OC diagonal), hidden clip fastening, and perimeter picture-frame borders | $4,000.00 · 30.6% | Professional Trade Labor Carpenter crew: mechanical auger digging of frost footings, concrete pier pouring, ledger board installation with structural ledger screws, 16" OC framing (12" OC diagonal), hidden clip fastening, and perimeter picture-frame borders | labour | $4,000.00 | 30.6% |
| permit Building Permit & Municipal Inspections Municipal residential building permit, plan review, zoning setback verification, and frost-depth footing inspection | $185.00 · 1.4% | Building Permit & Municipal Inspections Municipal residential building permit, plan review, zoning setback verification, and frost-depth footing inspection | permit | $185.00 | 1.4% |
| disposal Debris Disposal & Haul-Away Site grading scrap disposal, pallet recycling, joist cutoffs, and jobsite broom-clean cleanup | $264.00 · 2.0% | Debris Disposal & Haul-Away Site grading scrap disposal, pallet recycling, joist cutoffs, and jobsite broom-clean cleanup | disposal | $264.00 | 2.0% |
| materials Trex Transcend Composite / Aluminum Railing System Composite post sleeves, caps, top/bottom rails, and powder-coated balusters ($75/LF installed) | $3,900.00 · 29.9% | Trex Transcend Composite / Aluminum Railing System Composite post sleeves, caps, top/bottom rails, and powder-coated balusters ($75/LF installed) | materials | $3,900.00 | 29.9% |
| materials Trex Hideaway Universal Hidden Fastener Clips Trex Hideaway hidden clips and stainless start clips for seamless screw-free surface ($1.50/sq ft) | $480.00 · 3.7% | Trex Hideaway Universal Hidden Fastener Clips Trex Hideaway hidden clips and stainless start clips for seamless screw-free surface ($1.50/sq ft) | materials | $480.00 | 3.7% |
| Total Estimated Baseline Cost | $13,053.00 · 100.0% | ||||
|
National Contractor Range (320 sq ft)
$11,548 – $14,781 (
$40.79/sq ft)
| |||||
| Total Estimated Baseline Cost | $13,053.00 | 100.0% | |||
| National Contractor Range (320 sq ft) | $11,548 – $14,781 ( $40.79/sq ft) | ||||
Material Grades & National Supplier Pricing
Unit material pricing sourced from verified national suppliers (Home Depot, Lowe's, and specialty regional building distributors) as of 2026-10-22:
| Material Grade | Unit Price | Specification & Recommended Use Case | ||
|---|---|---|---|---|
| Material Grade & Specification | Unit Price | |||
| Trex Enhance Basics / Naturals (Scalloped Profile, 25-Yr Warranty) Trex Enhance scalloped composite decking boards ($5.20/sq ft) + pressure-treated 2x8 joist substructure, 4x4 posts, and concrete footings ($6.80/sq ft) = $12.00/sq ft material baseline | $12.00 / sq_ft | Trex Enhance Basics / Naturals (Scalloped Profile, 25-Yr Warranty) | $12.00 / sq_ft | Trex Enhance scalloped composite decking boards ($5.20/sq ft) + pressure-treated 2x8 joist substructure, 4x4 posts, and concrete footings ($6.80/sq ft) = $12.00/sq ft material baseline |
| Trex Select (Solid Core, High-Traffic, 35-Yr Fade/Stain Warranty) Trex Select solid profile composite decking boards ($7.80/sq ft) + pressure-treated structural framing, ledger board, and hardware ($6.80/sq ft) = $14.60/sq ft material baseline | $14.60 / sq_ft | Trex Select (Solid Core, High-Traffic, 35-Yr Fade/Stain Warranty) | $14.60 / sq_ft | Trex Select solid profile composite decking boards ($7.80/sq ft) + pressure-treated structural framing, ledger board, and hardware ($6.80/sq ft) = $14.60/sq ft material baseline |
| Trex Transcend / Lineage (Dense Protective Shell, Heat-Mitigating, 50-Yr Warranty) Trex Transcend / Lineage heat-mitigating solar core boards ($11.50/sq ft) + heavy-duty PT substructure framing and joist tape ($7.00/sq ft) = $18.50/sq ft material baseline | $18.50 / sq_ft | Trex Transcend / Lineage (Dense Protective Shell, Heat-Mitigating, 50-Yr Warranty) | $18.50 / sq_ft | Trex Transcend / Lineage heat-mitigating solar core boards ($11.50/sq ft) + heavy-duty PT substructure framing and joist tape ($7.00/sq ft) = $18.50/sq ft material baseline |
DIY vs. Professional Contractor Installation
DIY APPROACH
Best suited for experienced homeowners with proper specialty tools. Saves direct professional labor costs (typically 40% to 55% of the total contractor invoice). Requires significant physical stamina, site preparation, safety gear, tool rental expenses, and material hauling logistics.
HIRING A LICENSED CONTRACTOR
Recommended for structural integrity, code-compliant permitting, heavy demolition, and expedited completion. Professional contractors carry commercial general liability and workers' compensation insurance, provide manufacturer-backed workmanship warranties, and handle municipal building inspections.
Need an In-Depth Cost Analysis?
Explore our comprehensive cost guide for complete material comparisons, contractor negotiation tips, and local permit advice.
Frequently Asked Questions About Trex Decking Cost Calculator
What is the price difference between Trex Enhance, Select, and Transcend? ↓
Trex Enhance ($5.20/sq ft board material, ~$24.50/sq ft turnkey) features a scalloped underside to reduce weight and cost with a 25-year warranty. Trex Select ($7.80/sq ft board, ~$29/sq ft turnkey) offers a solid board profile and 35-year fade/stain warranty. Trex Transcend and Transcend Lineage ($11.50/sq ft board, ~$37/sq ft turnkey) deliver a heavy protective shell, heat-mitigating solar core, and a 50-year manufacturer warranty.
Does Trex decking require joist spacing of 12 inches or 16 inches? ↓
For residential installations where deck boards run perpendicular (90 degrees) to framing, 16 inches on-center (OC) joist spacing is standard. If you install Trex boards diagonally (at a 45-degree angle) or for commercial applications, maximum joist spacing must be reduced to 12 inches OC to prevent noticeable board deflection.
Are Trex Hideaway hidden fastener clips worth the extra cost over face screws? ↓
Yes. Trex Hideaway hidden clips slip into the grooved edges of composite boards and screw directly into joists from between boards, leaving a pristine screw-free surface. They also enforce automatic uniform 1/4-inch thermal expansion spacing. Face screwing saves ~$1.50/sq ft but leaves hundreds of visible screw heads across your deck surface.
Why is joist flashing tape essential when building a Trex composite deck? ↓
Trex composite decking boards last 25 to 50+ years, but the pressure-treated lumber substructure beneath can rot in 10 to 15 years if moisture gets trapped between boards and joist tops. Applying butyl flashing tape (such as Trex Protect) seals joist tops and screw penetrations, ensuring the frame lasts as long as the composite surface.
How much do Trex composite railings cost compared to wood railings? ↓
Trex Transcend composite railing kits with powder-coated aluminum balusters cost $65 to $85 per linear foot installed ($75/LF standard benchmark), compared to $25 to $40/LF for pressure-treated wood. While more expensive upfront, composite railings never require sanding, staining, or repainting.