I have a rental cottage. It has two stories with a bedroom and bath on the second floor that are accessed by spiral staircase. The bedroom opens onto a 4'x13' balcony which is 16 feet above a courtyard. Does Massachusetts building code require a stairway from the balcony to the ground?
Spiral staircases are allowed if they meet the specs (780 CMR 5318.104.22.168), but as with any bedroom, you have to have a second means of egress in an emergency (Sec. 5310). This can be a window in the bedroom, provided it meets the requirements. I don't see any requirement that a window be under a certain height from the ground. I recommend calling the local building inspector to be sure--your county or city may have more stringent requirements than the state building code.