{"nrhp_refnum":"93001390","name":"Insco Apartments Building","other_names":["Newcom Manor"],"category":"building","location":{"address":"255 N. Main St.","address_restricted":false,"city":"Dayton","county":"Montgomery County","state":"OH","lat":39.76349838100003,"lon":-84.19344703499996,"geom_source":"nps_gis"},"listed_date":"1994-02-18","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Social History","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A seven-story apartment building at 255 North Main Street in downtown Dayton, Montgomery County, Ohio, designed by architect Charles Insco Williams and erected in 1894-1895 in the Second Renaissance Revival style.","why_significant":"The nomination cites it as a significant local example of Renaissance Revival architecture and an early Dayton use of steel skeleton-frame construction. It is also the surviving work of Williams with an intact facade. It documents the turn-of-the-century shift toward luxury high-rise apartment living in the city center, and it is the last tall apartment building in Dayton's Central Business District.","narrative":"Rising seven stories on North Main Street in downtown Dayton, this apartment building was designed by architect Charles Insco Williams and built in 1894-1895. It has a buff pressed-brick shaft above a rusticated stone first story, round-arched windows, and a classically detailed cornice with dentils and modillions. Inside, an ornate foyer with a marble dado and vaulted ceiling survives. It was built with skeleton-frame construction, which was new to Dayton at the time. It was among the city's luxury apartment houses, built when wealthier residents began adopting urban apartment living. After the 1913 flood, many well-to-do residents moved to higher ground, and by the 1930s the building stood vacant. In 1943 the city converted it into war housing for women, and the interior was subdivided. Today it holds offices and shops on the lower levels and apartments above. It is the only tall apartment building remaining in the central business district and one of only two Williams buildings still standing downtown.","period_of_significance":"1894-1930","architect_builder":"Williams, Charles Insco","architectural_style":"Renaissance (Second Renaissance Revival)","criteria":["A","C"],"status_note":"Currently houses offices and retail space on the basement level and first floor, with modest apartments on the upper stories. The exterior is unaltered.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:52:07.284773-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/93001390.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/93001390/5489bdb918-800.webp","url_1600":"https://nationalhistoricalregister.com/media/93001390/5489bdb918-1600.webp","licence":"CC BY 3.0","author":"Photo by Greg Hume (Greg5030)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:InscoApartments.jpg\" rel=\"noopener\">Photo by Greg Hume (Greg5030)</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:InscoApartments.jpg"},"district":{"nrhp_refnum":"100004316","name":"Downtown Dayton Historic District","url":"https://nationalhistoricalregister.com/districts/ohio/downtown-dayton-historic-district-100004316/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71990573","wikipedia":"https://en.wikipedia.org/wiki/Insco_Apartments_Building","wikidata":"https://www.wikidata.org/wiki/Q6037168"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/montgomery-county/insco-apartments-building-93001390/"}