How much does a composite deck cost?
Composite deck installation runs $8,500 for a small Trex or TimberTech deck, $18,000 for a typical 16x20 composite deck with hidden fasteners, and $38,000+ for large multi-level decks with premium railing systems.
Quick price points (2026)
| Scope | Cost | What it includes |
|---|---|---|
| Low | $8,500 | installed |
| Typical | $18,000 | installed |
| High | $38,000 | installed |
How to budget for this project
- Get 3 quotes
Get itemized quotes from at least three licensed contractors in your area.
- Adjust for your region
Compare the same scope and account for regional labor and permitting.
- Add 10–15% contingency
Hidden conditions, code upgrades and permit fees can increase the original quote.
- Plan the cash, not the financing
Build the replacement cost into the home's repair plan before the work becomes an emergency.