Builder Pig (known as Construction Pig or Pig from "The Big Setup") is the pig with the construction hard hat, one of the bad Pigs

As well as being a background character, he was one of the three pigs to steal the eggs for King pigs birthday.

The other two hated him for his hat which was hindering their plan.

In King Pigs day off, he was ignored at the party so left after saying "Screw you guys".