One person has been injured after a fire ripped through a home in Christchurch.

Two fire crews were called to the early morning blaze on Linwood Ave just after 5am.

Fire and Emergency New Zealand acting shift manager Ian Littlejohn said the house was engulfed when crews arrived.

All people have been accounted for but one person has suffered injuries to the hand and minor smoke inhalation.

The fire was extinguished at about 7.20am and is not being treated as suspicious.

A fire investigator has been sent to the scene.

Littlejohn said the house is guaranteed to be written off.