Police were called to an apartment building at 3171 Eglinton Avenue East to the sound of gunshots.
The man, whose name has not been released, was found dead just inside a door at the back of the building.
Police haven’t released any details about possible suspects or confirmed whether anyone has been arrested.
Much of the block, including the building’s underground parking garage, has been cordoned off while police investigate.
Homicide and forensic investigators are on scene.