Firefighters from Lancashire and Greater Manchester were called at 8.45pm to George Street Motor Repairs Ltd on George Street.
They used used jets and a stinger, a fire engine with a water tower and pressurised hose, to extinguish the fire.
Cylinders were found by firefighters in the garage and as a result the electricity and gas were isolated to the property.
This meant that local residents were also affected by a loss of power.
The fire is now under investigation.