The Law of Travelers Upon Entering a House
Question
Answer
You have the status of a traveler as long as you have not entered the house and are standing at the threshold. However, when you enter to eat regularly in the house, you need to recite the first blessing again, even if you initially intended to continue eating at home.
Source
The Shulchan Aruch, Orach Chaim, Siman 178, Seif 4, states: "As is customary for travelers who eat on their way and sit to bless at the place where they finish eating." The poskim have written that when one wants to leave his house and stands at the threshold, intending to start eating, since it is evident that he is on his way out, he has the status of a traveler and does not have the status of a change of place, and therefore does not need to bless again outside.
It seems that upon returning, he is not exempt from the status of a traveler when standing at the threshold of his house and has not yet put down his belongings.