Building a new deck typically costs between $20 and $80 per square foot installed, depending on material and features. Use this free deck cost calculator to estimate your total project cost based on deck size, decking material (pressure-treated, cedar, composite, PVC, or Ipe hardwood), elevation, and optional features like railing, stairs, and built-in seating.
Decking material is the single biggest variable — Ipe hardwood costs about 3–4x what pressure-treated lumber costs per square foot. Composite and PVC decking save on long-term maintenance but cost more upfront. Elevated decks require larger footings, more framing, and stairs, which can add 30–50% to the project. Railings alone often run $30–$60 per linear foot.