The Judgement Factory is a room located in Gregory House. This is where all anthropomorphic scales live in (as seen in episode 12 of season 1 and 2). In the show, the original Judgement Boy doesn't live in the factory and instead lives in Room 207
The Judgment Factory is a large room with a high ceiling and probably bronze walls that look like they're rusting. The floor itself is black and has no furniture.
In Soul Collector, both the ceiling and the walls (except the wall with the door) are dark black, and the floor is wood. Knocking on one of the dark walls may give the player an item, usually a banana.