{"nrhp_refnum":"93000324","name":"O'Conor, Andrew J., III, House","other_names":[],"category":"building","location":{"address":"637 Chapel St.","address_restricted":false,"city":"Ottawa","county":"LaSalle County","state":"IL","lat":41.34874223800006,"lon":-88.82936753999996,"geom_source":"nps_gis"},"listed_date":"1993-04-22","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-and-a-half story brick Colonial Revival house at 736 Chapel Street in Ottawa, Illinois, on the city's east side near where the Fox River meets the Illinois River. It began as an 1848 Italianate house and was extensively rebuilt in 1922, with a 1922 brick garage.","why_significant":"The nomination argues the house is one of the best remaining local examples of early 20th century Colonial Revival architecture. It was redesigned in 1922 by Norman W. Cook, an Ottawa-born architect working in Chicago. The form describes it as well preserved and in excellent condition.","narrative":"Overlooking the river on Ottawa's east side, this brick house at 736 Chapel Street began in 1848 as an Italianate home built by early settler Henry Green. In 1922 Andrew J. O'Conor, III, an attorney, hired Norman W. Cook, an Ottawa-born architect working in Chicago, to redesign it at a cost of $45,000. The work removed the cupola and original roof, enlarged the walls, refaced the building in brick, and added a gambrel roof with dormers, a screened porch, a breakfast room and a north wing. A curved-roof entrance with fluted columns and a leaded glass fanlight faces the street. Inside, the original library fireplace and ceiling medallion were kept, and older woodwork was reused. A brick garage from 1922 and a low brick wall complete the grounds. The house was listed for architecture, as one of the best local examples of Colonial Revival design, with 1922 as its period of significance.","period_of_significance":"1922","architect_builder":"Cook, Norman W.","architectural_style":"Colonial Revival","criteria":["C"],"status_note":"Described as well preserved and in excellent condition; it has remained a private residence since built.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:37.639205-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/99/8933/28893399/content/electronic-records/rg-079/NPS_IL/93000324.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/93000324/51a919eb5d-800.webp","url_1600":"https://nationalhistoricalregister.com/media/93000324/51a919eb5d-1600.webp","licence":"CC BY 3.0","author":"IvoShandor","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Ottawa_IL_Andrew_J._O%27Conor_III_House1.jpg\" rel=\"noopener\">IvoShandor</a>, <a href=\"https://creativecommons.org/licenses/by/3.0\" rel=\"license noopener\">CC BY 3.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Ottawa_IL_Andrew_J._O%27Conor_III_House1.jpg"},"district":{"nrhp_refnum":"13000718","name":"Ottawa East Side Historic District","url":"https://nationalhistoricalregister.com/districts/illinois/ottawa-east-side-historic-district-13000718/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/28893399","wikipedia":"https://en.wikipedia.org/wiki/Andrew_J._O%27Conor_III_House","wikidata":"https://www.wikidata.org/wiki/Q4757425"},"indexable":true,"url":"https://nationalhistoricalregister.com/illinois/lasalle-county/oconor-andrew-j-iii-house-93000324/"}