Fire crews are at a large house fire north of Auckland.

A total of four fire crews have been called out to a property on McLachlan Road, in Kaukapakapa.

Northern fire communications spokesman Jaron Phillips said the upper level of the two-storey house was well-involved when staff arrived just after 10am.

Two more crews were called to the site at about 10.30am.

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Mr Phillips said there were people at home at the time, but everyone was safe and there were no injuries reported.