{"nrhp_refnum":"86001643","name":"Riddle-Friend House","other_names":["Slonaker--Friend--Riddle House"],"category":"building","location":{"address":"507 Springfield Pike","address_restricted":false,"city":"Wyoming","county":"Hamilton County","state":"OH","lat":39.22695228200007,"lon":-84.47313636099994,"geom_source":"nps_gis"},"listed_date":"1986-08-25","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Industry","Community Planning and Development","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"A two-story brick house at 507 Springfield Pike in Wyoming, Hamilton County, Ohio, built in 1832 in the Federal style by Isaac Riddle and Victorianized in the 1850s.","why_significant":"The nomination calls it Wyoming's most historically significant property. It is tied to the Riddle family, early landholders and pioneers, and to George H. Friend, a Civil War officer and Wyoming founder who owned the Friend Paper Mill in Lockland. Its layered Federal, Italianate and neo-classic changes and a community effort that saved it from demolition add to its standing.","narrative":"This two-story brick house at 507 Springfield Pike in Wyoming, Ohio, was built in 1832 by Isaac Riddle, son of the early pioneer General John Riddle, who had given him the land. The original Federal block, laid in American bond, survives at the back, and the elliptical fanlight over the main door is the clearest remaining Federal feature. In the 1850s George H. Friend, owner of the Friend Paper Mill in Lockland and a Civil War officer, Victorianized it with a front gable, bracketed eaves, Italianate stair and molded casework. A paired-column Doric portico, balcony and porches were added in the early twentieth century. Riddle surveyed the original village, and Friend was among Wyoming's founders. In the 1970s a developer planned to demolish the house for condominiums, but community protest led two local families to buy and save it. Residents regard it as the town's most significant historic property. It remains a private residence set on about 2.8 acres.","period_of_significance":null,"architect_builder":"Unknown; built by Isaac Riddle according to local historian Henry Teetor","architectural_style":"Federal/Victorian Italianate/Neo-classic","criteria":["A","B","C"],"status_note":"Residential use; interior and exterior condition listed as excellent.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:53:14.687106-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_OH/86001643.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/86001643/0516a4819f-800.webp","url_1600":"https://nationalhistoricalregister.com/media/86001643/0516a4819f-1600.webp","licence":"CC BY 3.0","author":"Photo by Greg Hume (Greg5030)","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:RiddleFriendHouseLR.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:RiddleFriendHouseLR.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/71986412","wikipedia":"https://en.wikipedia.org/wiki/Riddle%E2%80%93Friend_House","wikidata":"https://www.wikidata.org/wiki/Q7332427"},"indexable":true,"url":"https://nationalhistoricalregister.com/ohio/hamilton-county/riddle-friend-house-86001643/"}