The guide
American modernism was not imported to Chicago — it was invented here, twice. This is the short course: the three traditions, where the houses are, and what owning one actually involves.
At the turn of the twentieth century, Frank Lloyd Wright and the circle around his Oak Park studio invented the first genuinely American residential architecture: long horizontal lines answering the prairie, deep sheltering eaves, ribbons of art-glass casements, open plans decades before the term existed. Oak Park and River Forest hold the densest concentration of it anywhere — the Home & Studio and Unity Temple anchor a neighborhood you can walk — and Prairie-influenced houses run through the older suburbs and the boulevards. Original examples are landmarks in fact and often in law; buying one is buying a stewardship.
Chicagoland's postwar modern is quieter than California's and every bit as real. George Fred and William Keck were designing passive-solar houses in the 1930s and 40s — south glass, deep overhangs computed for the sun angle — a generation before anyone said “sustainable.” The North Shore ravine suburbs (Highland Park, Glencoe, Winnetka) collected architect-designed customs through the 50s and 60s, and the south suburbs — Flossmoor and Olympia Fields especially — grew their own mid-century pockets that remain the region's value play.
Mies van der Rohe arrived in 1938 to lead the architecture school at IIT and made Chicago the world capital of steel-and-glass modernism. Most of that legacy is vertical — the lakefront towers, with Bertrand Goldberg's concrete Marina City curving in dissent beside them — but the single-family expression exists too, from architect-built glass pavilions in the suburbs to the most famous house in the tradition, the Farnsworth House in Plano, an hour southwest. High-rise units in the landmark towers are their own market: co-op and condo boards, single-glazed curtain walls, and provenance that shows up in the price per square foot.
Modern in a freeze-thaw climate is a different ownership proposition than modern in California. The short list: