Forgive my ignorance on this subject.
When you have a space that could be considered a garage,with a space considered liveable,they are supposed to be sealed off from one another.Most of the time it's done with a solid wood door with a full jam.This is supposed to keep gasses from engine from settling in the livable areas.Will you be required to do this and how would you do it in your building?
I was denied a permit for this reason when I wanted to build a 24x24 on my house.They BI said it's a no no to have windows or other openings that lead into a space that could be used to house vehicles equipped with engines.I would have had to tear out and enclose three windows in the side of my house before I would be granted a permit for the 24x24 garage addition.I'm in an area with laxed building codes.