12×12 Deck Cost Calculator: 2026 Price Guide

12×12 deck costs between $2,880 and $9,360 for most homeowners in 2026, depending on material choice and local labor rates. At 144 square feet, it is a compact square deck that works well for intimate outdoor spaces and smaller backyards.

Frequently Asked Questions

How much does a 12×12 deck cost in 2026?

A 12×12 deck costs between $2,880 and $5,040 for pressure-treated wood and $5,040 to $9,360 for composite decking. The square shape makes it a simple and affordable build for most contractors.

What can fit on a 12×12 deck?

A 12×12 deck fits a 4-person dining table with chairs or a small outdoor sofa set. It is a comfortable size for 2 to 4 people and works well as a dedicated outdoor dining or lounging space.

How does a 12×12 compare to a 12×16?

A 12×12 gives you 48 fewer square feet than a 12×16. The 12×16 is the more popular choice as it offers significantly more space for furniture and movement. A 12×12 is better suited for very small backyards or tight spaces.

How long does it take to build a 12×12 deck?

Most contractors can complete a 12×12 deck in 2 to 3 days. The square shape is one of the simplest deck designs to frame and build, keeping labor time and costs low.