A home was built in the 1930’s. There is visual updates in a 1st floor half bath including newer glass block window (no vent), newer sink, toilet, floor tile, etc. There is no ventilation except the HVAC duct at the floor and the door. I don’t know when the work was done, but it obviously is not original.
After looking at many other “improvements” throughout the home, I suspect the work may have been done by the owner and possibly without permits but there is no way to know for sure without calling the local building inspection department (outside SOP). Any ideas?