In principle, he can't, unless he digs to a depth of more than 6 meters, and detects that the rocks below are difficult to weather, and then directly makes a pile platform at the dug position.

This requires the certificate of the Geological Exploration Institute. And notify the supervisor or the owner. Of course, this kind of house must have design documents. If the design documents do not require piling, there is no need to fight (the possibility is almost zero), and there is no money to take it.