Deck Building Costs at a Glance
A new deck is one of the best investments you can make for outdoor living — and 2026 is a great year to build one if you plan ahead. The average cost to build a deck ranges from $15 to $35 per square foot depending on the material, or roughly $4,500 to $14,000 for a standard 300-square-foot deck. Premium materials and complex designs can push that to $20,000 or more.
Spring and early summer are prime deck-building season, but that also means contractors get booked fast. If you're planning a summer 2026 project, getting quotes in May gives you the best shot at both fair pricing and available contractors.
Cost by Material — The Full Comparison
The biggest cost variable is your decking material. Here's how the three main options compare for a 300 sq ft deck:
| Material | Cost per Sq Ft (Materials) | Cost per Sq Ft (Installed) | 300 Sq Ft Total | Lifespan | Maintenance |
|---|---|---|---|---|---|
| Pressure-Treated Wood | $2–$5 | $15–$22 | $4,500–$6,600 | 10–15 years | Annual staining/sealing |
| Cedar | $4–$8 | $20–$28 | $6,000–$8,400 | 15–20 years | Periodic sealing |
| Redwood | $5–$10 | $22–$32 | $6,600–$9,600 | 20–25 years | Periodic sealing |
| Composite (Trex, TimberTech) | $6–$12 | $22–$35 | $6,600–$10,500 | 25–30 years | Minimal (wash yearly) |
| PVC (Azek, TimberTech Advanced) | $8–$14 | $28–$42 | $8,400–$12,600 | 30–50 years | Almost none |
| Ipe (Hardwood) | $10–$20 | $35–$55 | $10,500–$16,500 | 40–75 years | Oil annually for color |
Labor Costs and What Affects Them
Labor typically accounts for 50–65% of total deck cost. Here's what drives labor pricing:
- Basic ground-level deck: $8–$15/sq ft labor — straightforward framing on level ground
- Elevated deck (4+ feet): $15–$25/sq ft labor — requires posts, beams, and sometimes footings poured by a contractor
- Multi-level deck: $20–$35/sq ft labor — complex framing, stairs, and structural engineering
- Wraparound or curved deck: $25–$40/sq ft labor — custom cuts, more waste, longer build time
Additional labor-intensive features and their costs:
- Built-in bench seating: $200–$500 per 8-foot section
- Pergola or shade structure: $2,000–$6,000
- Deck railing (standard): $20–$40 per linear foot
- Cable or glass railing: $60–$120 per linear foot
- Deck stairs: $50–$120 per step (including railing)
- Built-in lighting: $500–$2,000 total
Permits, Inspections, and Hidden Costs
Don't forget the less obvious expenses that can add $500–$2,000 to your project:
- Building permit: $100–$500 in most jurisdictions. Required for almost any attached or elevated deck.
- Site preparation: $200–$1,000 — grading, clearing vegetation, removing an old deck.
- Concrete footings: $50–$150 per footing. Most decks need 4–8 footings.
- Structural engineering: $300–$800 if required by your jurisdiction for elevated decks.
- Waterproofing (under-deck drainage): $5–$10/sq ft — important if you want dry storage under an elevated deck.
Wood vs. Composite — Which Should You Choose?
This is the most common question homeowners face, and the right answer depends on your priorities:
Choose pressure-treated wood if:
- You're on a tight budget (saves $2,000–$5,000 on a typical deck)
- You don't mind staining every 1–2 years
- You like the natural look and feel of real wood
- You're handy and plan to DIY (wood is easier to cut and fasten)
Choose composite if:
- You want minimal long-term maintenance
- You're factoring in 20-year total cost of ownership (composite wins due to zero stain/seal costs)
- You want consistent color and no splinters
- You're in a humid or wet climate where wood rots faster
Over 20 years, a pressure-treated deck costs roughly $8,000–$12,000 (including maintenance), while a composite deck costs $7,000–$11,000 total. Composite actually becomes the cheaper option long-term in most scenarios.
DIY vs. Hiring a Pro
A confident DIYer can save 40–60% on labor by building their own deck. For a 300 sq ft pressure-treated wood deck, that's $2,500–$4,000 in savings. However, consider that:
- A DIY deck build takes the average homeowner 3–5 weekends
- Permits and inspections are still required
- Mistakes can be costly — a poorly built deck can fail or reduce home value
- Composite decking requires specialized hidden fastener systems
If you've never built a deck before, consider a hybrid approach: hire a contractor for the structural framing and do the decking (boards, railing, finishing) yourself. This saves 20–30% while ensuring the structural work is done right.