You're correct. There is a second house on Urban Street which is/was occupied by lacrosse players.
I've been wondering why Reade got the cab at Urban and Watts and not at Buchanan.
Perhaps after Kim announced "the show is over!" at 12:04 Reade and a few of the guys walked around the corner to the Urban house. There they quickly decided to just call it a night, and it is from there that Reade called the taxi, telling the cab to pick him and his friend up on the corner of Urban and Watts.
Would make sense that the sophomore Reade might have been better buds with the guys living in the Urban house (esp. if underclassmen) than to the senior team captains living in the Buchanan house.
But if that house had been searched, don't you think we would have some indication by now?