You can add a raised bar to your design if you have a section of your counter that is open on both sides. If this section also includes your sink, a raised bar is a great way to hide dirty dishes.
Determine how high you want the bar to be above the countertop and cut 2” x 6” stud spacers. Figure in the 1.5” for the thickness of the top plate and also the thickness of the final bar material when measuring the height of these spacers. You will want enough stud spacers to have one spaced every 18” along the length of the new bar space.