Shocked neighbours have said the family living in the property were 'perfectly nice and normal people'.'We knew them to say hello to and they seemed nice,' said one woman, who didn't want to be identified.
The woman, who lives at the back of the property, said an elderly couple lived in the home and had adult children.
The accused, whose names are known to Daily Mail Australia but not yet confirmed by police, were arrested in the simultaneous raids.
Australian Federal Police, ASIO and NSW Police jointly carried out the operation on Saturday in Surry Hills, Lakemba, Wiley Park and Punchbowl.
A number of 'items of interest' were seized in the raids and searches continued on Sunday, with AFP Commissioner Andrew Colvin suggesting they may take 'many more days'.
The other father and son duo are understood to have been arrested in separate raids.'The office of transport security has advised security screening will take longer, and travellers should arrive at terminals at least two hours before flights to allow ample time for screening,' he said on Sunday.