When replacing a wood deck with Trex composite, buyers typically pay for materials, labor, and site-related factors. Main cost drivers include deck size, railing type, stairs, and existing structure condition. The following figures reflect U.S. pricing in USD and assume mid-range materials and standard installation.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Deck Size Basis | 80 sq ft | 200 sq ft | 400+ sq ft | Per-square-foot costs scale with area |
| TREX Decking Material | $3.50 | $6.50 | $9.50 | Per sq ft, premium colors may add |
| Framing & Substructure | $4.00 | $7.50 | $12.00 | Pressure-treated or aluminum options |
| Labor (Deck Installation) | $4.00 | $12.00 | $20.00 | Hours depend on complexity and permits |
| Railing System | $20/linear ft | $40/linear ft | $70/linear ft | Glass, cable, or classic pickets affect cost |
| Stairs & Railings | $1,000 | $3,000 | $6,000 | Includes stringers, treads, and handrails |
| Permits & Inspections | $100 | $500 | $2,000 | Location-dependent |
| Delivery/Disposal | $100 | $500 | $2,000 | Waste removal and material drop fees |
| Warranties & Misc. Stuff | $0 | $500 | $1,500 | Extended warranties add value |
Assumptions: region, deck size, existing structure condition, and chosen railing system.
Overview Of Costs
Typical project ranges for replacing a wood deck with Trex in the United States generally fall between $8,000 and $25,000, depending on size and features. Smaller, simple decks under 120 sq ft often land in the $8,000–$14,000 range, while mid-sized decks around 150–300 sq ft commonly run $12,000–$22,000. For larger or more complex installations with premium railing, integrated lighting, or multiple levels, costs can exceed $25,000. Per-square-foot estimates commonly cited vary from $9 to $22 for total installed cost, with materials typically representing about 40–70% of the total. Labor hours often range from 8–16 hours for straightforward replacements to 40+ hours for elaborate projects.
Cost Breakdown
The following table shows how money typically allocates across major components.
| Component | Low | Average | High | Notes |
|---|---|---|---|---|
| Materials (Trex decking) | $2,800 | $6,500 | $9,500 | Includes boards and fixings |
| Framing & Substructure | $3,200 | $7,000 | $12,000 | Fasteners and joists included |
| Labor | $3,200 | $12,000 | $20,000 | Varies by site access |
| Railing System | $1,000 | $4,000 | $7,000 | Material choice drives cost |
| Stairs | $1,000 | $3,000 | $6,000 | Interior vs exterior placement matters |
| Permits & Fees | $100 | $500 | $2,000 | Municipal requirements vary |
| Delivery/Disposal | $100 | $500 | $2,000 | Waste and material handling |
| Contingency | $200 | $1,200 | $3,000 | Typically 5–10% of project |
data-formula=”labor_hours × hourly_rate”> In practice, a basic replacement will usually lean toward the lower end of the ranges, while multi-tiered decks with upgraded railings and lighting push costs higher.
What Drives Price
Key price drivers include deck size, material grade, and railing complexity. Larger decks dramatically increase material and labor needs. Premium Trex boards with embossed textures, darker colors, or anti-slip finishes cost more per square foot. The chosen railing style—from classic pickets to glass panels or stainless steel cables—adds a sizable premium both in materials and installation time. Substructure choices like aluminum framing can reduce maintenance but increase upfront costs. Finally, site access and existing structure condition can add labor hours and disposal/remove-and-rebuild fees.
Ways To Save
Economy-focused strategies can trim upfront in several areas. Consider a mid-range Trex line instead of premium textures, and optimize where stairs and railings are required rather than over-building. If existing framing is viable, replacing decking without a full substructure rebuild lowers costs. Scheduling work during off-peak seasons can yield labor discounts in some markets. Obtain multiple quotes to compare both material packages and total bids, and confirm that quotes include permits, delivery, and disposal so there are no hidden fees.
Regional Price Differences
Prices differ by region due to freight, labor, and permit variability. In the Northeast, expect higher installed costs due to labor rates and building codes, while the Midwest can be slightly more economical. The West Coast often shows premium pricing for materials and inspection requirements, and the South may offer lower labor costs but higher material shipping charges in some markets. Typical regional deltas hover around +/- 10–25% from national averages, depending on local demand, permit stringency, and contractor availability.
Labor, Hours & Rates
Labor rates range with market strength and crew size. Typical hourly rates for deck installers fall between $40 and $75 per hour, with specialized railing crews sometimes higher. A straightforward 150–200 sq ft replacement might require 16–40 hours of labor, including framing, decking, railing, and stairs. Complex projects with multiple levels, custom railings, or integration of lighting and drainage can exceed 60 hours. A reasonable target is to view labor as 40–60% of total installed cost for mid-range projects.
Real-World Pricing Examples
Basic Scenario: 120 sq ft deck with standard Trex decking and vinyl railing, no stairs replacement. Assumptions: mid-range boards, simple joists, standard permits. Labor about 18 hours. Total: $9,000–$13,000; materials about $4,200; labor about $4,800–$7,000; per sq ft about $75–$110.
Mid-Range Scenario: 180 sq ft deck with Trex Reserve boards, mid-tier railing, 3 steps, basic lighting. Assumptions: standard site access, local permit. Labor about 28–34 hours. Total: $14,000–$22,000; materials about $7,200; labor about $6,800–$11,000; per sq ft about $78–$122.
Premium Scenario: 300 sq ft with Trex Transcend boards, glass or cable rail, multiple landings, integrated lighting and drainage, aluminum framing option. Assumptions: complex stairs, close site, permit bundle. Labor about 50–60 hours. Total: $25,000–$40,000; materials about $12,000; labor about $11,000–$20,000; per sq ft about $83–$133.
Assumptions: region, specs, labor hours.
