The cause of the blaze at the Marine Pub is still under investigation but the Burnaby Fire Department says it is suspicious.
Firefighters were called at about 2:30 a.m. and found the back of the building engulfed in flames.
Burnaby Fire Department Assistant Chief Rick Weir says the blaze grew quickly and at one point flames shot up to 24 metres in the air.
More than 30 firefighters responded and no one was injured in the fire.
The fire department and RCMP continue to investigate.