Deck cost calculator
What will your deck cost?
Size, material, height. A Treasure Valley price range in seconds — no contact details required.
Estimated installed range
$7,000–$13,500
192 sq ft · Capped composite (e.g. Trex, TimberTech, Fiberon) · raised (1–4 ft) · $40–$62/sq ft base
Priced at your site visit
Railing · Stairs · Old deck removal & haul-off · Solid roof cover · Pergola · Low-voltage lighting — these vary too much by yard to price blind.
Ranges reflect published 2026 Treasure Valley and national installed-cost data, not a Valley Decks quote. Your price depends on size, height, access, footings, railing, stairs and permit scope — we confirm it in writing after an on-site measure.
Want the reasoning behind the numbers? Read what a deck costs in Boise in 2026.
Calculator questions
- How accurate is the deck cost calculator?
- It gives a planning range from published 2026 installed-cost data for the Treasure Valley and national benchmarks, adjusted for height. It can't see your yard, so railing length, stairs, demolition, footings on a slope and permit scope are priced after an on-site measure. Treat it as a budget check, not a quote.
- Why does deck height change the price so much?
- A taller deck needs longer posts, bigger footings, bracing, stairs and a guard on every open edge. In Boise and Nampa, anything more than 12 inches above grade also needs a building permit with framing and ledger details, which adds design time and inspections.
- What does a 12 × 16 composite deck cost in Boise?
- At the published 40–62 dollars per square foot for capped composite, a 192 sq ft raised deck lands roughly in the high four to low five figures before railing and stairs. Use the calculator above with your exact size and height for a tighter range.
- Do I have to give my phone number to see a price?
- No. The range shows as soon as you pick a size, material and height. If you want a written estimate, the form below the result carries your numbers over so you don't have to retype them.
- Is composite really worth the higher price?
- In Boise's dry air and strong sun, untreated wood checks and grays quickly and needs regular stain. Capped composite costs more upfront and skips that maintenance. Our composite vs wood guide walks through the trade-offs, including heat underfoot on dark boards.
Sources
- Iron Crest Remodel — Boise deck pricing (2026)
- HomeGuide — Composite decking prices (2026)
- HomeGuide — Cedar decking cost (2026)
- HomeGuide — Pressure-treated decking cost (2026)
- Remodeling / JLC Cost vs. Value 2025 — Mountain region
Last reviewed .
Next step
Ready to price your deck?
Tell us the size, the material you're leaning toward and when you'd like it built. We'll follow up to schedule an on-site measure.