Two people have been evacuated from their home in Swansea Heads near Newcastle after a large hole opened up under the property.

Police say a sink hole, 15 metres wide and 10 metres deep, opened up under the house shortly before 7:00pm (AEST) on Tuesday.

Authorities arrived at the home in Lambton Parade to find the front corner of the house had collapsed.

Two people were evacuated from the home and were not injured, but the property was extensively damaged.

The Mine Subsidence Board is investigating what is thought to be a disused mine shaft.

Police say engineers are expected to further examine the sinkhole today.