Did a new construction house the other day, part of a big development. The development was in what used to be a corn field in a suburb and the Village wants the tax revenue, so they have a “relaxed” code environment.
2nd floor. Only one return and it was on the wall of the 2nd floor hallway. above each room door was a register with another one ion the other side. So ductwork between, they just cut holes in the drywall and screwed the registers to the drywall.
They even took a piece of sheet metal and screwed it into the 2 x 4 above the door so that light would not go through the registers, but you could hear everything through the walls.
I asked the builder and he said, “Hey, it meets code.”
And the development was billed as “luxury” homes.