Photo: George Block
Fire and Emergency New Zealand supervisor Brent Dunn said crews were deployed about 10.45pm to the house on Wray St, amid reports that a person remained in the house.
On arrival they found and extinguished a small fire in a bedroom, he said.
St John attended and assisted a "very distressed" but otherwise unharmed person.
The cause of the blaze was known to fire crews but he was unable to provide further details.
Police and a fire investigator had been notified.
