The tenant on the 200 block of Walker Street made the discovery around 10:22 a.m., and called police, Cliffside Park Deputy Chief Vincent Capano said.
The man was reportedly homeless and often snuck into the building to sleep downstairs, Capano said. He battles alcoholism and other various medical issues for years, the deputy chief added.
The man's body was taken to the Medical Examiner's office.
Click here to follow Daily Voice Mahwah-Ramsey and receive free news updates.