Sorry to go off topic.
I usually take the stairs everywhere (no lifts etc) and many/most of the stairs are built incorrectly. Either the 'run' is too small or large or the 'rise' is the same. Many, many 2 or 3 storey buildings have low head height.
But the builders seem to use those cement slabs, placed side by side for the second, third floors. So you may be able to have steps to a landing, then 90 degrees for more steps to the second floor and remove some cement slabs without interfering with the beams.
But as Crossy says, need a picture or two.
Building correct stairs is a real art.