second floor front room
Refers to a room on the second floor at the front of a building, often a traditional Japanese house or shop. The term is somewhat specific and may not be widely used in modern contexts.
I look down at the street from the window of the second floor front room.
Compound of 表 (front) and 二階 (second floor). The exact historical derivation is uncertain, but the term straightforwardly describes a front-facing room on the second floor.