Which is correct, 'the person's door you are or the person's door you at?

The correct answer is:

"The person's door you are at..."

As used in the sentence "The person's door you are at belongs to Julie." or "Do you know the person's door you are at ?"

The sentence "The person's door you are" suggests that "you are a person's door" which is a little absurd.

The sentence "The person's door you at" is understandable but is like African American Slang English.