Emergency services were called to the Te Maru Place property in Redwood at about 12.40am.
Police say a person was found deceased in a caravan that had been destroyed by the fire.
The death is currently being treated as unexplained.
A scene guard has been in place overnight and police and Fire and Emergency NZ investigators will be carrying out a scene examination this morning, they said.
The blaze has sen the suburban street cordoned off by police.
At least two fire trucks were at the scene in the early hours of the morning.