Remodeling a bathroom usually involves the same process which is planning, removing anything that’s being replaced, replacing old pipes, fixing the wiring, patching up torn surfaces, finishing the room’s wallpaper/paint/tile and adding the last touches like installing baseboards or vanities.
Of course, there can be more steps added, but this is the majority of the remodel. The planning process is key to the entire project and can save you can lot of money when done properly.