Pennypacker Mansion
Why it's listed
Built in the early eighteenth century, probably by Hans Joest Heijt, this stone house with a stucco finish stands in the Perkiomen Valley at Pennypacker's Mills near Schwenksville, Pennsylvania. Peter Pennebecker bought it in 1747, and his family owned it during the period when it gained wider importance. In 1777, the Continental Army encamped nearby from September 26 to 29, and General George Washington used the house as his headquarters. From there he received news of General Horatio Gates's victory at Stillwater, and he sent requests for troops and supplies that the nomination links to the American move toward Germantown. Around 1902, former Pennsylvania governor Samuel W. Pennypacker enlarged the house with a rear addition, a side kitchen, a wraparound verandah, and dormers, and he used it as a summer home. He also wrote a book about the local history and folklore, which is one reason the property is remembered. The original kitchen survives behind the house, built with the same stone construction.
Significance in brief: The nomination argues the house was used as Continental Army headquarters for General Washington during the encampment of September 26-29, 1777, and that it was the later summer residence of former Pennsylvania governor Samuel W. Pennypacker. It also notes its link to the 1755 passage of General Braddock's army through the area.
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 76001657, listed November 7, 1976. Summary generated October 2026 (model claude-haiku-5-5, prompt v1.1-2026-10-29, confidence medium).
Key facts
| Address | 5 Haldeman Rd., Schwenksville |
|---|---|
| County | Montgomery County |
| Listed | November 7, 1976 |
| Reference number | 76001657 |
| Resource type | Building |
| Period of significance | 1718-1730 |
| Architect / builder | Hans Joest Heijt (presumed) |
| Areas of significance | Military, Politics/Government, Architecture |
| Level of significance | National |
| Acreage | 5.5 |
| Coordinates | 40.25420, -75.45726 (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 76001657.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7164493
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.