Isn’t there usually supposed to be a bit of headroom between the top of the doors and the ceiling?

This isn’t a basement we’re looking at. It’s the ground floor.

It seems pretty obvious that there used to be a large garage door taking up most of the front of this “house.” I suspect that maybe the building was originally just someone’s detached garage, and they decided to “finish” it and sell it as a standalone home. Good luck with that.