I went and checked out Brown’s NPC. They don’t ask about the primary family residence there–they have removed that from the calculations. They do ask about other real estate holdings and assets.
I ran my numbers on Brown’s NPC and compared to two LACs that meet full need where I know the exact aid amounts and also know that the NPCs are very close to the actual figures, Brown is almost exactly in between them (the discrepancy between the two others is almost entirely attributable to one having a no-loan policy while the other doesn’t). [Here’s a tip also: if you are signed into a College Board account, it will grab the most recent NPC numbers you have filled in anywhere. If you want to run different sets of entries, you can also save the link and return to that, and then do the same as previously stated in terms of transferring that data to other NPCs]
I don’t know what might be causing the Brown NPC to be higher for you. I would think that the schools would treat non primary home real estate assets similarly.