by Jerry Peck - Codeman on Mon Mar 04, 2013 11:18 pm
You can call a bedroom anything you want, but according to the code it will still be a "sleeping room". As the saying goes: "A rose by any other name ... " is still a "sleeping room".
I can envision the possibility that you could convert the den/craft room into a 'loft/hallway' where 'den' stuff (entertainment center equipment?) is on one side of the hall up against one wall, and the 'craft' stuff up against the opposite wall, leaving a hallway between the two. Granted, this would take some additional work, but you would then be accessing the bedroom by that stairs and then through the 'loft/hallway'.
Keep in mind, though, that removing a window and replacing it with a doorway that is now an interior doorway could cause the loss of required natural light and natural ventilation.
Sounds to me that you really need to talk to an architect or someone similar who will be able to properly design and layout what you want within what you are working with so that all the pieces will not only work together but also be code compliant.
Jerry Peck - CodeMan
AskCodeMan.com
Construction Litigation Consultant - Retired
Construction and Code Consultant - Semi Retired