Fire and Emergency New Zealand said four crews responded to the blaze.
One person has died after a house fire in Mairehau in Christchurch. Photo / Supplied
The fire, while still well involved, is under control, a spokesperson said.
A Hato Hone St John spokesperson said four ambulances, two rapid response units and an operations manager went to the scene.
Cordons are in place around Whitehall St and the public is urged to avoid the area while a scene investigation is carried out.