Washroom (1F)

thumb|Entering the Washroom. ''This article is about the Washroom on the first floor of Luigi's Mansion. For the Washroom on the second floor, see Washroom (2F).''

After Luigi collected five Boos, the Washroom mysteriously became unlocked. When Luigi went inside, he noticed a lone Toad crying and cowering in a corner. When the plumber spoke to the Toad, it mentioned that it had dropped something important inside the toilet. By reassuring the Toad, the lights in the Washroom magically went on. Afterward, in true plumber fashion, Luigi opened the toilet for inspection. Instantly, the Key to the Fortune-Teller's Room popped out.

The Washroom, although smaller than the Bathroom, is quite cramped. Starting on the west side, there is toilet with an antique-style hanging tank, a mirror overlooking a sink, a radiator, and a medicine cabinet. The sink will often contain a 10-HP or 20-HP restoring Heart for Luigi.