Firefighters attended an incident involving a portable cabin on Denby Street, Sheffield in the early hours of this morning.
Fire crews were called at 2.02am and arrived at the scene to find the building well alight.
Firefighters from Central and Mansfield Road stations used main jets to extinguish the blaze and left around 2.45am.
The fire is believed to have begun accidentally and there was no damage to any other property.