Park Ridge has a genuine pre-war core. Around Uptown and through the Country Club district the housing is 1920s and 1930s Colonials, Tudors and Chicago-style bungalows. Move west and south and it turns over to 1950s and 1960s ranches and split-levels. Teardown-and-rebuild activity has been steady since the 1990s, so newer houses are scattered through both.
That mix means the same question comes up on every first visit: what year was this house built. A 1928 Colonial near Uptown behaves like Wilmette — galvanised supply, a cast-iron stack, plaster on lath, a small tiled bathroom. A 1958 ranch behaves like Morton Grove — copper supply, a waste run in a slab, a roomier bathroom and a fan going into the attic.
Neither is difficult, but they are not the same job and they do not cost the same. We establish which one you have before quoting, because a pre-war house needs the plumbing replaced and a post-war one mostly needs the layout rethought.