Riddle-Friend House
Also known as: Slonaker--Friend--Riddle House
Why it's listed
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.
Significance in brief: 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.
Machine-generated summary. This summary was generated by a language model from the official nomination document and has not been reviewed line by line by an editor. It may contain errors. Check the source document before relying on any detail. Source: nomination document (PDF) · National Archives catalog entry. NRHP reference 86001643, listed August 25, 1986. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | 507 Springfield Pike, Wyoming |
|---|---|
| County | Hamilton County |
| Listed | August 25, 1986 |
| Reference number | 86001643 |
| Resource type | Building |
| Architect / builder | Unknown; built by Isaac Riddle according to local historian Henry Teetor |
| Architectural style | Federal/Victorian Italianate/Neo-classic |
| Criteria |
|
| Areas of significance | Industry, Community Planning and Development, Architecture |
| Level of significance | Local |
| Status (as stated in the nomination) | Residential use; interior and exterior condition listed as excellent. |
| Acreage | 2.8 |
| Coordinates | 39.22695, -84.47314 (NPS GIS) |
What listing means for this property
National Register listing is honorary for a privately owned home: it does not by itself restrict what an owner may do with their own money, and it does not require public access. Restrictions come from local landmark or historic-district ordinances, which are separate (how they differ).
Owner-occupied houses are not eligible for the 20% federal rehabilitation tax credit, which applies to income-producing buildings, but many states offer credits for homeowners. Listing also opens the door to preservation easements and to buying a plaque. Start with what listing means for homeowners, renovating a listed house and selling one.
General information, not legal or tax advice. Rules change; confirm with your State Historic Preservation Office or a qualified adviser.
Sources and further reading
- National Park Service, National Register of Historic Places database (snapshot May 2026), reference 86001643.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7332427
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.