You should recall, from previous posting, you'll be asked how many conductors are in the
existing switch box, and if there are just 3, a black, a white and a ground its only a switch leg, however if there are more than 3 conductors, you probably also have a hot pair.
Which side of the recp. is the wall stud on?
If you have an accessible attic you may not need to damage the walls, at all.