Deck Cost Calculator
Estimate deck construction cost by square footage, material, and options like railing and stairs. Accounts for elevated builds.
Material
Deck Level
Options
What drives deck construction costs?
Decking material is the primary cost driver. Pressure-treated pine is the entry point at $15–$25/sq ft installed; cedar runs $20–$35; composite (Trex, TimberTech) $25–$45; and tropical hardwoods $30–$55+. Labour accounts for 50% of total cost and increases with deck height — an elevated deck requires more structural work, longer posts, and additional bracing. Railings add $40–$80/linear ft depending on material (aluminum balusters vs. glass panels). Permits typically add $500–$1,500.
Ground-level vs. elevated: what changes?
A ground-level deck (within 12 inches of grade) is typically the simplest and cheapest build — minimal footings, no lateral bracing required, and lower labour. An elevated deck (second-story or hillside) requires engineered footings, ledger board attachment to the house, and post-to-beam connections that meet local seismic or wind codes. Expect to pay 20–35% more for elevated builds. Some jurisdictions require structural engineering drawings for elevated decks, adding $500–$1,500 to permit costs.
Composite vs. wood: total cost of ownership
Pressure-treated pine has a low upfront cost but requires staining every 2–3 years ($300–$600/application) and boards may warp or check over time. Composite decking costs 60–80% more upfront but needs only occasional cleaning, carries 25-year fade/stain warranties, and won't splinter. Run a 20-year cost analysis: composite often wins on total spend once you factor in maintenance. Cedar sits in the middle — better aesthetics than PT pine, less maintenance, but still requires sealing.
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