The fire that all but destroyed an implement shed and an attached sleepout on an orchard in Pilmer Road was caused by an electrical fault in a ride-on mower stored in the shed.
Fire and Emergency NZ crews responded to the blaze at Makauri at around 2.25am Tuesday morning.
The 20 by 15 metre building was well involved in fire when they arrived.
Specialist fire investigator Tim Allan was called in to ascertain a cause.
“It was started by a short in the battery in the ride-on mower.”