Perpendicular Wall Transitions

Another BAD INSTALL on a $20M house in Miami Beach. Planning ahead for these is extremely critical and hazardous. The interior and exterior wall finish thickness are rarely detailed on architectural plans, often pending interior design decisions that may not come till after windows are ordered.

Interior wall framing is often a minimum 1-1/2" to over 2" thick and in stairs like this 25-30 feet high, expect them to not be plumb, reducing your opening even more.