See geographic terms and names.
room numbers and names
Usually, it is acceptable to drop the word room from addresses, as long as you do so consistently throughout the publication:
Our office is in 314 Samford Hall.
212 Brooks Hall
129 Chapman Hall
N101 Divinity Hall
Don’t capitalize room when it is followed by a number, unless it is the first word in a sentence.
Capitalize room and similar words when part of a proper or well-known name:
the Auxiliary Room
the Flag Colonnade