{"nrhp_refnum":"95001235","name":"Green Bay Road Historic District","other_names":[],"category":"district","location":{"address":"Roughly, area surronding 10 S to 1596 N Green Bay Rd. and Ahwahnee Rd.","address_restricted":false,"city":"Lake Forest","county":"Lake County","state":"IL","lat":42.26292859500006,"lon":-87.84799314344444,"geom_source":"nps_gis"},"listed_date":"1995-11-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture","Social History"],"significance_levels":["local"],"summary":{"what_it_is":"A large residential historic district of country houses and estates along Green Bay Road in Lake Forest, Lake County, Illinois, developed west of the railroad between 1890 and 1945. It also includes the Onwentsia Club and St. Mary's Church.","why_significant":"The district is presented as an outstanding example of domestic architecture in an exclusive exurban community, with high-quality designs by important architects and a high degree of integrity. Its estates were built by the second generation of Chicago's business and social elite, who helped develop the city as a center of commerce, banking and industry. Its park-like landscape and large estate lots set it apart from the neighboring Lake Forest Historic District.","narrative":"Green Bay Road in Lake Forest, Illinois, runs along a ridge west of the railroad, and the historic district built around it preserves a landscape of country houses and estates created between 1890 and 1945. Henry Ives Cobb was the first to build there in 1890, and Howard Van Doren Shaw soon followed. The Onwentsia Club, founded in the 1890s, became the social center of the area. The district covers about 2.25 miles by 1.75 miles and is almost entirely single-family residential, with large lots, long private drives, mature trees and outbuildings such as gate houses, stables and greenhouses. Colonial Revival, Tudor Revival, French Eclectic and Arts and Crafts styles predominate, with work by architects including Arthur Heun, Harrie Thomas Lindeberg and David Adler. The form counts 153 contributing and 129 noncontributing resources. It was listed as an outstanding example of domestic architecture in an exclusive exurban community, associated with Chicago's business leaders.","period_of_significance":"1890-1945","architect_builder":"Henry Ives Cobb, Howard Van Doren Shaw, Arthur Heun, Harrie Thomas Lindeberg, David Adler, Albro & Lindeberg, James Gamble Rogers (among many architects named)","architectural_style":"Colonial Revival, Tudor Revival, Arts and Crafts, French Renaissance Revival, Classical Revival, Art Deco","criteria":[],"status_note":"Houses are maintained to a high standard and integrity is high; most outbuildings remain, and some have been converted into separate single-family residences.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:37.806033-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/62/8933/28893362/content/electronic-records/rg-079/NPS_IL/95001235.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/95001235/b5127a087e-800.webp","url_1600":"https://nationalhistoricalregister.com/media/95001235/b5127a087e-1600.webp","licence":"CC BY-SA 3.0","author":"Teemu08","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Innisfail_Lake_Forest.JPG\" rel=\"noopener\">Teemu08</a>, <a href=\"https://creativecommons.org/licenses/by-sa/3.0\" rel=\"license noopener\">CC BY-SA 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Innisfail_Lake_Forest.JPG"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28893362","wikipedia":"https://en.wikipedia.org/wiki/Green_Bay_Road_Historic_District_(Lake_Forest,_Illinois)","wikidata":"https://www.wikidata.org/wiki/Q86752771"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/lake-county/green-bay-road-historic-district-95001235/"}