He is in the Class 1B building, though the dorm rooms have the same layout as the ones in 1A. Here's his room's layout:

He actually doesn't have much in his room at all. He has his bed, a chair and desk, and dresser. He also has shelves for his belongings. The stuffed animal he has stays on his bed, though.

Since he's blind, he had help from Fuji on decorating his room. The curtains have FatGum on them, as do his bedsheets and comforter. He also has posters up of FatGum, too. It's clear who his favorite pro hero is, but can you blame him? It's the same hero who adopted him!