Glassworks-Core House
Also known as: Building 302-B (Army Corps Historic Buildings Survey)
Why it's listed
Built around 1820 in the village of Glassworks, about a quarter mile north of Greensboro, this three-bay, two-and-a-half story timber frame house follows the vernacular I house form. Its main block was originally a single room on the first floor, with a centrally placed fireplace on the south wall and a narrow box winder stair in the southeast corner. The house was constructed on land owned by the New Geneva Glassworks Company, which was founded in 1797 by Albert Gallatin and German glassmakers and is credited with producing the first glass west of the Alleghenies. The house is regarded as one of four surviving houses tied to the early glass industry of southwestern Pennsylvania. Its significance rests on this industrial link and on its survival as a representative small vernacular dwelling of the early nineteenth century. Later changes include modern windows, panelling, a porch with wrought iron posts, and a rear kitchen addition.
Significance in brief: The nomination argues the house is associated with the early glass industry, since the main block was built on land owned by the New Geneva Glassworks Company. It is described as one of four surviving houses linked to the early glass industry in southwestern Pennsylvania and as a good example of a small early nineteenth-century vernacular house.
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 95000121, listed July 27, 1995. Summary generated October 2026 (model claude-haiku-5-5, prompt v1.1-2026-10-29, confidence high).
Key facts
| Address | PA 2014, Monongahela Township, Glassworks |
|---|---|
| County | Greene County |
| Listed | July 27, 1995 |
| Reference number | 95000121 |
| Resource type | Building |
| Period of significance | 1820-1860 |
| Architectural style | Vernacular I house |
| Criteria |
|
| Areas of significance | Industry |
| Level of significance | Local |
| Status (as stated in the nomination) | Renovated in the twentieth century with modern windows, doors and interior panelling; a shed roof porch and a rear kitchen addition were added, and a door was cut to create a second-floor apartment in the late twentieth century. |
| Acreage | 0.9 |
| Coordinates | 39.80013, -79.91312 (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 95000121.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q5567194
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.