A small cabin has been lost and homes have been evacuated due to a fire in Christchurch's Port Hills.

The fire's estimated to have burnt though around 15 hectares since fire crews were first called just after 11 last night.

There have been partial evacuations along Avoca Valley Road - and emergency services are liasing with affected residents.

Area commander Dave Stackhouse says at the height of the fire 15 appliances and crews were deployed to combat the fire.

He says the 50 firefighters on the ground are focusing on protecting structures along Port Hills Road and are working to stop the fire from spreading further up the hill.

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