Wondering where everyone draws their house plan in relation to origin (0,0).

I realize I've drawn mine so the front of the house and everything in the Y direction is always negative, with (0,0) at the:

1. Back rear corner of the house, and
2. Positioned at the outside wall boundary.
https://imgur.com/a/1hbLo8z

How do other people position their designs in relation to the origin? Do you go with outside wall, or inside wall?