16×20 Deck Cost Calculator: 2026 Price Breakdown

16×20 deck costs between $6,400 and $20,800 for most homeowners in 2026, depending on material and location. At 320 square feet, it is ideal for homeowners who love to entertain and want space for dining, lounging, and grilling all in one area.

Frequently Asked Questions

How much does a 16×20 deck cost in 2026?

A 16×20 deck typically costs $6,400 to $11,200 for pressure-treated wood and $11,200 to $20,800 for composite decking. It is ideal for homeowners who love to entertain.

What can fit on a 16×20 deck?

A 16×20 deck comfortably fits a large dining table, lounge chairs, a grill station, and still leaves room to move around. Many homeowners also add a pergola or shade structure at this size.

Is composite worth it on a 16×20 deck?

For a larger deck like a 16×20, composite is often worth the upfront cost. You will save significantly on maintenance over 10 to 15 years with no staining, sealing, or board replacement needed.

How do I get the best price on a 16×20 deck?

Get at least 3 contractor quotes, build in spring or fall when demand is lower, and consider pressure-treated wood framing with composite decking boards only on the surface to balance cost and low maintenance.