Artist wrote:
I relies this but I was wondering what other home owners may have
done or any home improvement contractors experience on a matter like
this.

OK, but remember, this is NOT legal advice and you should consult a
lawyer immediately.

Was a permit required for this job? Did the contractor get one? If
not, call your local city / county inspection agency and ask them to
cite the contractor for working without a permit. They will get his
insurance information (if he has any).