How much does deck replacement cost?
Enter deck surface area, editable material cost, editable labor cost, and waste. The default example estimates about $5,984.
Separate scope lines
Deck cost pages estimate one planning scope at a time. Surface boards, framing, railing, stairs, footings, demolition, permits, hidden fasteners, fascia, and repairs can be separate.
Use local prices and product specs
Composite, PVC, cedar, pressure-treated, hardwood, stain, sealer, and paint all price differently. Replace defaults with your local material and labor inputs.
Deck board example counts
Examples use 5.5 in boards, 0.25 in gaps, and 10% waste. Board length, seams, fascia, stairs, railings, and framing are separate.
| Deck size | Board rows before waste | Boards with 10% waste |
|---|---|---|
| 12 ft x 12 ft deck | 26 rows | 29 boards |
| 12 ft x 16 ft deck | 34 rows | 38 boards |
| 12 ft x 20 ft deck | 42 rows | 47 boards |
| 16 ft x 20 ft deck | 42 rows | 47 boards |
| 20 ft x 20 ft deck | 42 rows | 47 boards |
Before you calculate
- Measure the deck surface area in square feet before entering cost inputs.
- Separate boards, staining, sealing, fascia, stairs, and railing when pricing differs.
- Use local material and labor rates rather than national averages.
Common mistakes
- Treating surface-board cost as a full deck build quote.
- Forgetting demolition, hidden fasteners, fascia, railing, stairs, framing repairs, and disposal.
- Using one labor rate for both board replacement and coating work.
Formula
cost = area * (1 + wastePercent / 100) * (materialCostPerSqFt + laborCostPerSqFt)
Assumptions
- Costs are editable planning inputs, not contractor quotes.
- Demolition, framing repairs, footings, railings, stairs, disposal, permits, access, and code upgrades can be separate.
- Use local material and labor prices before budgeting.
Example
Estimated deck replacement cost: 5984 USD
How to estimate deck replacement cost
- Measure the project area in square feet.
- Enter editable material cost and labor cost per square foot.
- Add waste or planning buffer when material quantity changes with cuts or layout.
- Multiply adjusted area by the combined cost rate.
- Use local quotes and project scope notes before treating the result as a budget.
Before you buy materials
- Use quotes or local store pricing to replace defaults.
- Keep contingency visible for damaged boards, access, and layout changes.
FAQ
How do I estimate deck replacement cost?
Multiply deck area by material plus labor cost per square foot, then add waste. Use local prices and separate complex scope items.
How much is 320 sq ft in this example?
At $7 material and $10 labor /sq ft with 10% waste, 320 sq ft is about $5,984.
Does this include framing or railings?
Only if this page is specifically for that scope or you include those costs in the inputs. Otherwise price boards, framing, railings, stairs, footings, and coatings separately.
Should I price decking and staining separately?
Yes. Board replacement, staining, sealing, fascia, fasteners, stairs, and railing often use different units and labor rates.
Related calculators
This calculator is for planning estimates only. Verify final quantities with product labels, project conditions, and a qualified professional when accuracy matters.