Roscoe Village is twenty-five-foot lots and workers’ cottages, built from the 1890s through the 1920s and upgraded steadily ever since rather than rebuilt all at once. A great many of the houses were jacked up over a new basement at some point, and a great many have a rear addition added later.
The kitchen sits at the back, long and narrow, with the stack in the rear wall and the back door and basement stair taking up the wall that should hold cabinetry. If a previous owner added on behind it, the kitchen may now be further from that stack than it was designed to be.
That distance is the thing to establish first. A sink on an island in a long narrow plan can need a horizontal run that is already at minimum fall by the time it reaches the stack. We check it from the basement before it goes in a drawing, because it is the one constraint that can change a layout after the cabinets are ordered.