Montreal police Const. Danny Richer said workers at Mango Copper Industries found the body at about 11:30 a.m. on Tuesday.
"It's impossible for the investigators to determine the sex or the age of the body found," Richer said.
The business is located in the Rivière-des-Prairies–Pointe-aux-Trembles borough along 10930 Sherbrooke Street East.
Richer said investigators have not determined whether foul play was involved. Investigators are waiting for a coroner's report to determine the circumstances of the death.