Platoon Chief Joe Armstrong tells CHSJ News 3 people lived in the older building and one man was treated for burns to his hands.
He says crews could see the smoke and flames coming from the house long before they arrived. The house has suffered a large amount of damage.
Armstrong says a fire investigator is on the scene and the cause is being looked into by both city police and the fire department.
One man was charged with a drug offense and released.