DeckMath
All budgets
Under $15,000 · all 20 sizes

Under $15,000 Deck Build

Comfortable mid-budget — fits a 16×20 mid-composite deck with composite or aluminum railing + properly sized framing. Most popular upgrade target for owners moving up from a 30+ year-old PT deck.

Recommended: composite · composite rail
Typical builds at this budget

16×20 (320 sqft) mid composite (Trex Transcend, Fiberon Sanctuary) with composite or aluminum railing + 5-6 step stairs. Includes permit, demolition of existing deck if applicable, and standard 5-7 year contractor labor warranty.

Budget cuts (if over)

Pick mid composite, not premium PVC (TimberTech AZEK). Use aluminum railing instead of cable ($30+/lf savings). Skip picture-frame border (save $400-700). Build during shoulder seasons (March-April, October-November) for 8-12% labor discount.

Pick your deck size — see what fits under $15,000

Open the calculator pre-loaded for under $15,000

The full deck cost calculator dials in your exact size + material + railing + stair + state labor multiplier for a real quote-ready number.