<p>I was accepted back in December and filled out my housing almost immediately for summer and fall. My friend just got accepted in this march decision today and he wants to room with me. I have no problem with that, I'd probably prefer to room with someone I'm comfortable with and know and trust. Just how does it work, if I had a decent priority number back in December and he's just doing housing now? Do they base it off of my priority number or is it just completely random? Any idea?</p>
<p>If you choose roommate preference as more important than hall preference, they would use your friend’s priority number, as they use the worse of the two.</p>