If you are going to use an adjacent room, then you need to look at what is having on the walls to be removed. Credit rating bearing, then you will have to put in a beam to support the burden. Most of my clients would prefer to see no evidence that the wall has been removed. In other words, they want a flush ceiling, which means you have to slice the joists apart and set up an in-ceiling beam. It can not that hard, but there is a particular technique to achieving this. I suggest you use a qualified remodeler to do this.
The particular wall studs can make restrictions on where in addition to how large an opening can be and a person are making different types shelves. Recessed shelves usually are basically holes cut directly into your wall that manufactured in a frame, dry walled over, and painted or even covered so you get the equivalent shelf room, but without anything adhering out into the room. These shelves can end up being large rectangles, small squares, and even full cabinets with doors, and all current with added shelf space you won’t bump in to the bathroom.