Deck Building Cost Calculator: Materials + Labor 2026
Published Apr 14, 2026 · 7 min read
A well-built deck recovers 60-80% of its cost at resale according to Remodeling Magazine's 2026 Cost vs. Value report. But costs vary wildly depending on material, size, and whether you hire a contractor or go DIY.
Average Deck Cost Per Square Foot (2026)
| Material | Material Cost/sqft | With Labor/sqft | 300 sqft Deck Total |
|---|---|---|---|
| Pressure-treated wood | $2-$5 | $15-$25 | $4,500-$7,500 |
| Cedar | $4-$8 | $20-$30 | $6,000-$9,000 |
| Composite (Trex, TimberTech) | $5-$12 | $22-$35 | $6,600-$10,500 |
| PVC / cellular | $8-$15 | $28-$45 | $8,400-$13,500 |
| Hardwood (Ipe, Cumaru) | $10-$20 | $35-$55 | $10,500-$16,500 |
Wood vs. Composite: The 20-Year Math
Pressure-treated lumber costs less upfront but needs staining/sealing every 2-3 years ($1-$2/sqft each time) and replacement boards after 10-15 years. Composite costs 2-3x more initially but requires zero staining and lasts 25-50 years. Over 20 years, the total cost often converges.
Hidden Costs People Forget
- Permits: $100-$500 depending on municipality. Always required for attached or elevated decks.
- Footings/foundation: $200-$2,000 for concrete piers or helical piles.
- Railings: $15-$100 per linear foot, required for decks 30 inches or higher above grade.
- Stairs: $500-$2,500 for a standard entry staircase with railing.
- Demolition: Removing an old deck runs $5-$15 per sqft.
DIY vs. Hiring a Contractor
Labor typically represents 50-60% of total deck cost. A competent DIYer can save $3,000-$6,000 on a standard 300 sqft deck. However, mistakes in framing, footings, or code compliance can cost more to fix than the labor savings. Unless you have experience with structural carpentry, hire a licensed contractor for the substructure and consider DIY only for decking boards.
Best Time to Build
Lumber prices peak in spring and drop 15-20% in fall/winter. Contractor availability is also better October through February. If your climate allows it, scheduling a winter build can save 10-20% on materials and potentially get lower labor bids.
How to Get Accurate Quotes
Get three written quotes minimum. Each should itemize materials, labor, permits, and disposal separately. Be suspicious of quotes significantly below market — they often indicate cut corners on footings, fastener quality, or code compliance.