ᐅ Planning the staircase to the attic space, which has not yet been developed

This is a planned terraced house. The attic will initially remain unfinished. Our primary preference was a concrete staircase from the first floor to the attic. Due to the height situation, two dormer windows are necessary. We do not like their appearance, and overall the costs are quite high. We are currently considering a space-saving staircase. However, we have difficulty imagining where to place the space-saving staircase—either in the hallway or in one of the children’s rooms, which would then become an office. For child number two, we would then partially or fully finish the attic space above.

We appreciate any help!
Thank you very much!