2021 Cost to Build A Deck

How much does it cost to build a deck? The cost to build a deck depends on deck size, materials, railing, stairs, deck framing and code requirements, etc. In addition, it is often cheaper to build a deck during construction of a new home vs. an existing home.

Some general estimates of deck cost per square are as follows:

• Treated Lumber Deck Per Square (Joists 16” On Center): $38

• Treated Lumber Deck Per Square (Joists 16” On Center): $26

Treated lumber is the most economical decking material. The following image illustrates the price difference in decking materials (not including framing and other materials):

Every construction project is different and material costs change often, so these estimates can only be used as a rule of thumb for cost per square foot for a completed deck with stairs and railings.