Deck size, material, height off ground, stairs, and railing — enter the specs and get material cost, estimated labor hours, and a total quote with your margin built in.
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Decks look like simple square-footage math. They aren't. The framing, ledger attachment, post anchoring, joist hangers, blocking, and hardware underneath a deck can cost as much as the visible decking on top. Contractors who price only the visible surface consistently underbid — and either eat the loss or cut corners on the structural work.
Composite decking runs $4–$8/sq ft for mid-grade, $8–$14/sq ft for premium — versus $2–$4/sq ft for pressure-treated pine. But the framing for a composite deck is identical to the framing for a PT deck. The customer is paying more for the surface but the structural labor is the same. That's where composite becomes a better margin job — more material revenue with similar labor content, especially when you markup the material 25–35%.
Basic code-compliant wood railing adds 15–20% to the total job. Composite or cable railing adds 25–40% — at significantly higher material cost and only moderately higher labor. Customers who want composite decking almost always want composite or cable railing. Upsell the railing when you're already selling premium decking — the customer is already in a premium mindset.
A deck without a permit that fails — or that causes injury — exposes you to liability with no legal protection. Most jurisdictions require permits for decks over 30" above grade. The inspection process also protects you: a passing inspection is documented proof that the work was done correctly. Pull the permit, pass the inspection, and make sure the customer knows it's included in your quote.
US deck builds typically run $25–$75/sq ft installed depending on material and features. A basic PT deck runs $25–$35/sq ft. A composite deck with railing and stairs runs $50–$80/sq ft. Premium composite on an elevated deck with cable railing can hit $100/sq ft. Know where your quote lands on that spectrum — and be able to explain why. "We're not the cheapest, but you're getting code-compliant structural work with premium material" is a better conversation than competing on price.
Quote templates, material tracking worksheets, change order forms, and the business documents for carpentry, decking, and home improvement contractors.
Deck pricing is driven by square footage, decking material (pressure-treated, composite, hardwood), structure complexity, height, railing linear footage, stairs, and permit costs. This calculator builds a complete deck construction quote from each component — so you're pricing decks accurately, not just estimating by the square foot and hoping for the best.