If you are talking about a floor to ceiling pantry, here is one I had built. It is approx 4' wide and 30" deep. Not sure what you mean by storage on the door. If you are talking shallow shelves to be mounted on the inside of the doors, there are a couple factors to consider: the weight of these could eventually take the doors out of alignment and the placement would need to be planned so that they don't interfere with the rolling shelves inside.