Deck Building Cost Guide: What to Budget in 2026
Building a deck is one of the most popular home improvement projects — and one of the best ROI renovations you can do. Here's a real breakdown of what it costs and what drives the price.
Average Deck Costs in 2026
- Pressure-treated wood deck: $15–$35 per square foot installed — the most affordable option
- Composite deck (Trex, TimberTech): $35–$65 per square foot installed — higher upfront, minimal maintenance
- Hardwood deck (ipe, cedar, redwood): $30–$60 per square foot installed — beautiful but requires annual sealing
- PVC/vinyl deck: $40–$70 per square foot — low maintenance, not as natural looking
For a 400 sq ft deck: $6,000–$14,000 for pressure-treated; $14,000–$26,000 for composite.
What's Not Included in That Price
- Permit fees — $200–$800 depending on location
- Stairs — add $100–$300 per step for a staircase with landing
- Built-in features — benches, planters, pergolas: $500–$3,000+ each
- Lighting — solar or wired deck lighting: $200–$1,500
- Demo of old deck — removal and disposal: $500–$2,000
Pressure-Treated vs. Composite: The Real Math
PT wood requires staining or sealing every 2–3 years ($200–$500 each time) and typically needs boards replaced within 15–20 years. Composite requires only occasional cleaning and most products carry 25–30 year warranties.
For a 400 sq ft deck, the 20-year total cost of ownership often favors composite by $3,000–$6,000 when you factor in maintenance. If you're staying in the home long-term, composite is almost always the better financial decision.
Factors That Drive Up Your Cost
- Height above grade — elevated decks require longer posts, more structural work: add 15–30%
- Complex shape — L-shapes, multiple levels, curves cost significantly more than a simple rectangle
- Railing type — cable railing or glass panels add $150–$400 per linear foot vs. standard railing
- Soil conditions — deep footings in cold climates add $500–$2,000
Deck ROI: What You Get Back at Resale
The 2025 Cost vs. Value Report shows wood decks recoup ~68% of cost at resale — one of the best ROI projects available. Decks consistently rank in the top 10 renovation ROI projects nationwide.
Use our deck cost calculator to get a quick estimate based on your size and material choice.