Decks and patios
Deck Construction Cost Guide: Pressure-Treated Wood vs Composite (2026)
Cost breakdown comparing pressure-treated wood ($22–$35/sq ft) against composite decking ($45–$70/sq ft) over a 20-year ownership lifecycle.
Data reviewed October 24, 2026
Building an outdoor deck expands residential living space and delivers strong lifestyle value. However, choosing between traditional pressure-treated lumber, cedar, and composite decking (Trex, TimberTech) significantly impacts upfront construction budgets and long-term maintenance costs.
| Decking Material | Cost / Sq Ft (Installed) | Total Build Cost (300 sq ft) | 10-Year Maintenance Cost |
|---|---|---|---|
| Pressure-Treated Pine | $24 - $32 | $7,200 - $9,600 | $2,400 (Powerwash & stain) |
| Western Red Cedar | $35 - $48 | $10,500 - $14,400 | $2,400 (Sealing) |
| Entry Composite (Trex Basics) | $42 - $55 | $12,600 - $16,500 | $250 (Soap & water wash) |
| Capped Polymer (TimberTech Advanced) | $58 - $75 | $17,400 - $22,500 | $250 (Soap & water wash) |
Material Costs: Wood vs Composite
Pressure-treated Southern yellow pine ($15–$25 per square foot installed) is the most economical upfront option. High-performance composite decking ($38–$65 per square foot installed) carries a higher initial cost but requires zero staining, sanding, or chemical sealing.
Substructure: Footings and Framing
Regardless of surface boards, substructure framing utilizes pressure-treated ground-contact lumber. Concrete sonotube footings dug below the local frost line (36 to 48 inches in northern zones) ensure structural stability.
Railing Systems and Stairs
Railing systems represent 20% to 30% of total deck cost. Aluminum and cable railing ($60–$110 per linear foot) preserve sightlines compared to standard pressure-treated wood balusters ($25–$40 per linear foot).
Frequently asked questions
- Does composite decking get too hot in direct sun?
- Darker composite boards can become hot under intense summer sun. Opt for lighter tan or light grey tones if your deck faces south with no shade.
- How long does a pressure-treated wood deck last?
- With regular bi-annual washing and staining, a pressure-treated wood deck lasts 15 to 20 years. Composite decking lasts 25 to 30+ years.