Enter the deck’s square footage, pick a decking material — pressure-treated, cedar or redwood, composite, premium composite, or PVC — add railing, stairs, or old-deck removal, and get a competitive 2026 price range in seconds. Then hand the customer a branded estimate before they call the next deck builder.
A new deck costs $20–$80 per square foot installed in 2026, depending on the decking material: pressure-treated wood runs $20–$40, cedar or redwood $28–$50, mid-grade composite $35–$55, premium composite $50–$70, and PVC $55–$80. Railing and stairs add $5–$12 per square foot, an elevated or raised structure adds $4–$10, and tearing out an old deck first adds $5–$15, while large decks price 10–15% lower per foot at scale. A typical 16×20 ft deck (about 320 sq ft) lands around $11,200–$17,600 for a mid-grade composite build. The calculator below prices it instantly by square footage and material, and QuoteIQ turns the result into a sendable, branded estimate — or an online self-quote your customers run themselves. Plans start at $29.99/mo.
Deck jobs are priced by the square foot: the deck area times a per-foot rate for the chosen material, plus add-ons for railing, stairs, height, and demo. The formula: area × material rate × scale factor = base price. The material you install is the biggest lever — a pressure-treated deck and a PVC deck can differ by 3–4× per square foot — and the structure is the wildcard, because footings, beams, railing, and stairs add cost the deck surface alone never shows. The calculator above uses the 2026 U.S. market ranges below; your material grade and local labor decide where you land inside each band.
| Material / add-on | Typical 2026 rate (per sq ft, installed) |
|---|---|
| Pressure-treated wood | $20 – $40 |
| Cedar / redwood | $28 – $50 |
| Composite, mid-grade | $35 – $55 |
| Composite, premium | $50 – $70 |
| PVC / AZEK | $55 – $80 |
| Railing & stairs (add-on) | $5 – $12 |
| Elevated / raised structure (add-on) | $4 – $10 |
| Tear out & haul old deck (add-on) | $5 – $15 |
Railing and stairs are the silent margin killer. Bidding a deck on its square-foot surface rate alone — while a wraparound rail and a full stair run quietly eat days of labor — is how a clean composite deck turns into a break-even job. Quote the rail, the stairs, and the footings as their own lines, or the framing crew eats the profit.
Three factors move every quote beyond the deck surface itself: structure (railing, stairs, and footings can add more labor than the decking boards, and a raised or multi-level deck needs taller posts and more beams), site (a sloped or hard-to-access yard slows the build and can require engineered footings), and scale — large decks price 10–15% lower per square foot because mobilization, delivery, and crew setup spread across more area, which is why the calculator’s Large toggle applies a 13% reduction. For benchmarks on managing job costs and margins, the U.S. Small Business Administration is blunt: price from your costs, not your competitors’.
A $14,000 composite deck isn’t $14,000 in your pocket. Decking boards, joists and beams, fasteners and hidden clips, footings and concrete, railing, stair stringers, equipment, delivery, and labor all come out first — and deck margins live or die on framing labor and material waste, not on any single quote. The SBA’s guidance on managing finances is blunt: track cost per job, not per month.
If the calendar is full but the bank account isn’t growing, the quotes weren’t the problem — under-priced railing, stairs, and footings were. QuoteIQ Job Costing attaches material, labor, and framing time to every deck so you see real margin per job, not a guess.
Deck work is a trust game: the contractor who shows up with a clear, professional number usually wins the job. Inside QuoteIQ, the price you just calculated becomes a branded estimate sent from the job site, a slot on the schedule, and an invoice that collects card payment the day the deck is done — and customer self-quoting puts this same square-foot logic on your website so homeowners price their own deck and book while you’re on another job. Measuring from a site plan? MapMeasure Pro pulls square footage straight off the map.
Review Multiplier turns finished decks into Google reviews automatically — the social proof that sells the next build. QuoteIQ serves deck builders among 50+ home service industries — and if you run other services too, try the free lawn care, pressure washing, and tree removal calculators, the detailing price list template, or browse all our free tools.
Square footage is the easy part — margin lives in the framing, railing, and stain options. Deck building estimating software prices tiered options on one professional bid, and this comparison of software for deck building businesses shows what each platform includes.
Turn this estimate into a branded, sendable quote in about 60 seconds — or put this calculator’s logic on your own website with customer self-quoting, then run the schedule, the invoice, and the review request without leaving QuoteIQ. Plans start at $29.99/mo.
“QuoteIQ simplifies scheduling, invoicing, and customer communication, making pressure washing businesses run smoothly always.”
Verified App Store ReviewA new deck costs $20–$80 per square foot installed in 2026, depending on the decking material: pressure-treated wood runs $20–$40, cedar or redwood $28–$50, mid-grade composite $35–$55, premium composite $50–$70, and PVC $55–$80. A typical 16×20 ft deck of about 320 sq ft lands around $11,200–$17,600 for a mid-grade composite build, and railing, stairs, and old-deck removal are the most common reasons a quote climbs. Enter your square footage and material in the calculator above and the range updates instantly, then send it as a branded quote through QuoteIQ.
Deck cost per square foot installed runs $20–$40 for pressure-treated wood, $28–$50 for cedar or redwood, $35–$55 for mid-grade composite, $50–$70 for premium composite, and $55–$80 for PVC such as AZEK in 2026. Those rates include materials and labor for the deck surface and framing; railing and stairs add $5–$12 per square foot, and labor alone is typically half to sixty percent of the total. Pick your material in the calculator above to see the range for your exact square footage.
A 16×20 ft composite deck — about 320 sq ft — costs roughly $11,200–$17,600 with mid-grade composite in 2026, or about $16,000–$22,400 in premium composite. The 2025 Zonda Cost vs. Value report pegs a national-average composite deck addition near $25,000 once railing, stairs, and an elevated structure are included, which is why those add-ons matter. Railing and stairs add $5–$12 per square foot and a raised or multi-level frame adds $4–$10. Price your exact deck in the calculator above.
Composite decking costs $35–$55 per square foot installed for mid-grade and $50–$70 for premium — roughly a 25–40% premium over a pressure-treated wood deck at $20–$40 — but it never needs staining or sealing and commonly lasts 25 to 30 years, so over a 20-year horizon the total cost of ownership often narrows or beats wood. Pressure-treated stays the lowest upfront price; cedar or redwood ($28–$50) splits the difference with a natural look that needs upkeep. Compare materials side by side in the calculator above.
Deck railing runs about $20–$60 per linear foot installed — wood at the low end, composite and metal higher — and a deck stair run typically adds $1,400–$2,600 plus footings. Across a whole deck that works out to roughly $5–$12 per square foot of deck for railing and stairs combined, which is why this calculator treats it as a per-square-foot add-on. They are easy to under-quote because the labor hides in posts, balusters, and stringers rather than the deck surface. Toggle the Railing & stairs add-on in the calculator above to fold it in.
Deck builders price by the square foot: deck area times a per-foot rate for the chosen material, plus add-ons for railing, stairs, height, and demo. The formula is area × material rate × a scale factor, with extras of $5–$12 per square foot for railing and stairs, $4–$10 for an elevated or raised structure, and $5–$15 to tear out and haul an old deck. Large decks price 10–15% lower per square foot because fixed costs spread across more area. If you are setting your own rates, build from your costs — boards, framing lumber, fasteners, footings, labor, insurance — then check against the market table on this page and track real margin per job with QuoteIQ Job Costing.
QuoteIQ is the best software for deck building and outdoor-living businesses because it runs the whole job from one app: customer self-quoting puts a square-foot price calculator on your website so leads book themselves, quotes send from the job site, jobs land on the schedule, invoices collect card payment when the deck is done, job costing tracks material and labor against every build, and Review Multiplier turns finished decks into Google reviews automatically — all rated 4.7 stars across 4,100+ reviews and built for deck builders among 50+ home service industries. Plans start at $29.99/mo, below comparable Jobber and Housecall Pro tiers and a fraction of ServiceTitan. Book a free demo to see it on your own pricing.
Yes — the calculator on this page is free to use and works on any phone or tablet, which helps when you are quoting a deck standing in the customer’s backyard. Enter the square footage, pick a material, add railing, stairs, or demo if the job needs it, and get an instant range; the first time you download or print an estimate, enter your first name and email once and it is unlocked on this device for good. When you are ready to send branded quotes and collect payment, QuoteIQ offers a 14-day free trial on every plan, and a credit or debit card is required to start. Start a trial or keep using the calculator as often as you like.
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