C&S Individual Project within a Campus Registration

This may be a very simple question, and perhaps our team is looking into this too deeply: We have a campus which we intend to use a Master Site with individual registrations (i.e. not a group). If we want to pursue a credit on just one building, is that allowed? For example, we want one building and only the area of that building to get the Green Power and Renewable Energy Credit, but only that building. It may put it into a different certification tier. Does this pose any problems if we still use the Master Site to claim points for other credits?