Vineyard,
I am not sure if we are in disagreement or not. I don’t think I am fully comprehending your latest reply.
The 2012 VA-IRC, Section R311.2.1 was poorly written and impossible to get consensus opinion on what it is meant to accomplish, hence the rewrite which I have just been told, was approved by the BHCD for the 2015 VA-IRC.
The new version clearly says additions do not have to comply. Additions can use any size door at the end of a hallway, or anyplace on the same level as the egress door.
What it does say to contractors is this: if your trim package and 2′-10″ door do not work with your hallway, you have to change your hallway width.
Call me if you want to discuss. 804-717-6428