Crews were called to a burning shed in Ngongotahā on Tuesday evening.
A Fire and Emergency NZ spokeswoman said five crews from Rotorua and Ngongotahā stations were called to the blaze about 4.20pm.
On arrival they found a shed “well involved” in fire.
There was no one in the shed at the time and there was nothing to suggest the fire was suspicious, the spokeswoman said.