From Longman Dictionary of Contemporary Englishon somebody’s/the doorstepon somebody’s/the doorstepNEARa)very near someone’s homeWow! You’ve got the beach right on your doorstep!b)at someone’s homeI got a shock when he just turned up on the doorstep. →doorstep
Examples from the Corpus
turned up on the doorstep• The phone kept ringing and no one there, and then he turned up on the doorstep.• My guess is you turned up on the doorstep during business hours with some papers for Marty to sign.