Originally Posted by nealtw
I was thinking of drawing a line from the left side of the staircase straight up to the outside wall giving you plenty of room for a closet and maybe your extra room. For a smoking room in a non-smoking house, you will want fresh air vent and exhaust fan and independent heat source.
Hopefully the designers will be along shortly with their ideas.
Nice that was my same idea! So it seems I was on the right track!