Morton Grove was built out almost entirely between 1950 and 1970, in brick ranches, Georgians and a smaller number of split-levels, on modest and very regular lots. It is one of the most uniform suburbs in the area, and we have a second base here, so this is housing we know street by street.
The bathroom in one of these houses is typically five by eight or a little larger, with a steel or cast-iron tub in an alcove, a single vanity, original ceramic tile to about four feet, and a fan that either does not work or is not going anywhere useful. Supply is copper. The waste run is below a slab or in a shallow crawl.
The result is that a good bathroom here is mostly a planning and finishing exercise. There is no galvanised supply to chase, no cast-iron stack to worry about and no plaster to cut. What limits the layout is the drain route under the floor, and what most needs correcting is the ventilation.