The fire started around 2:15 a.m. on the 1400 block of Rosalie Street.
Firefighters arrived to heavy flames showing from the rear of the house.
The twelve residents from inside the home were all able to get out safely.
Officials say the fire brought down wires which caused a power outage.
PECO crews were called to the scene to make repairs.
There were no reports of any injuries.
The Fire Marshal is investigating the cause of the blaze.