{"nrhp_refnum":"89000419","name":"Hobart Circle Historic District","other_names":[],"category":"district","location":{"address":"2--9 Hobart Cir. and 11 and 23 Hobart Dr.","address_restricted":false,"city":"Troy","county":"Miami County","state":"OH","lat":40.04307983450005,"lon":-84.20957745143406,"geom_source":"nps_gis"},"listed_date":"1989-05-25","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Engineering","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"A residential historic district in Troy, Miami County, Ohio, centered on Hobart Circle and made up of prefabricated welded steel houses built between 1938 and 1940 by the Hobart Welded Steel House Co. Houses in the survey include examples at 2, 3, 4, 5, 7, 8 and 11 Hobart Circle/Drive.","why_significant":"The houses were designed and built by the Hobart brothers and prefabricated entirely of 18 gauge welded steel in their West Main Street factory, then trucked to the site. The Hobart Circle subdivision contains a concentration of these houses, with the survey describing each as one of 21 remaining Hobart houses. Several are in styles such as Georgian Revival, Cape Cod, Dutch Colonial Revival and Moderne, and some remain largely unaltered.","narrative":"Hobart Circle in Troy, Ohio, is a small subdivision of houses made entirely of welded steel. The Hobart brothers' Hobart Welded Steel House Co. fabricated each house of 18 gauge steel in its West Main Street factory and delivered it by truck to the site. The houses date from 1938 to 1940 and were first held as rentals by the company, then sold in the mid to late 1940s. The survey counts 21 surviving Hobart houses, with the Circle holding a notable group. Styles include Georgian Revival, Cape Cod, Dutch Colonial Revival and a rare Moderne example. Original features such as welded steel entrance hoods, circular windows and sixteen-light casement windows survive on some houses, and one lot keeps an original steel storage shed described as the only one of its style. Others have been altered with vinyl siding, replacement windows and new roofs, though the steel construction remains. Together they document an unusual local experiment in prefabricated housing.","period_of_significance":null,"architect_builder":"Hobart Welded Steel House Co (the Hobart brothers)","architectural_style":"Georgian Revival, Cape Cod, Dutch Colonial Revival, Art Moderne (\"Hobart Colonial\")","criteria":[],"status_note":"Houses are in use as single family dwellings or rentals; condition ranges from excellent to fair/poor. Some retain original features while others have replacement windows, siding and roofs.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:14.964874-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/89000419.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71985901","wikipedia":null,"wikidata":null},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/miami-county/hobart-circle-historic-district-89000419/"}