Housing Help

I was recently accepted and am committing to CPP as a freshman (I plan to pay the $150 nonrefundable). I’m still waiting for another school (UCSD) on their waitlist, which is released from May 1st to June 1st. June 1st is also the last day to apply for housing, but I read in another thread that the waitlist can get hundreds deep in those last few days.
Is the $450 initial for housing refundable? If not, how long should I wait to send in my housing app and payment?
Thanks, and go Broncos!

It’s refundable before August 24th (not sure on date)

I did email them asking about the housing fee and whether or not that it was refundable, and they responded saying that it would be refundable once you notify them that you plan not to house / attend the school.