Deck Replacement Cost Calculator
Add your deck size, whether the old deck needs tearing out, and your rebuild material to estimate the full replacement cost — demolition plus rebuild, shown as a low-high range.
Choosing a material fills in a typical installed rate, which you can edit. Tear-out includes demolition and disposal.
Estimates only — not financial advice. This calculator gives approximate figures for planning. It is not financial, tax, or legal advice; check with a qualified professional before making decisions.
How the deck replacement cost calculator works
Replacement has two bills: getting rid of the old deck and building the new one. Demolition with haul-away runs about $5 per square foot. The rebuild rate depends on the material — pressure-treated is the budget pick, cedar sits in the middle, composite costs roughly double wood but needs almost no maintenance.
The total is shown as a ±15% range because labor varies by market, permits, stairs, and railings. Treat the low end as a simple flat deck in a cheap market and the high end as a two-level deck with stairs in an expensive one.
total = area × rebuild rate + area × $5 (tear-out) · low = total × 0.85, high = total × 1.15
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Deck replacement cost calculator FAQ
How much does it cost to replace a deck?
Roughly $25–$55 per square foot rebuilt, plus about $5 per square foot for tear-out — so a 320 sq ft deck runs about $9,600–$19,000 rebuilt. Enter your numbers above for your range.
How much does deck tear-out cost?
About $5 per square foot including demolition labor and disposal, so a 320 sq ft deck costs roughly $1,600 to tear out. Rotted framing that crumbles can cost more.
Wood or composite for a replacement deck?
Pressure-treated wood costs roughly half of composite up front; composite costs roughly double but needs no staining and lasts 25–30 years. Over 15+ years the lifetime costs often land close.
Should I repair or replace my deck?
Repair if the framing and footings are sound and only boards are worn. Replace if posts, beams, or joists are rotting, the deck is over 20 years old, or repairs would cost more than half of replacement.
Does a bigger deck cost less per square foot?
Usually yes — fixed costs like permits, mobilization, and footings spread over more area. Small decks under 200 sq ft often price at the high end of the per-square-foot range.