Ralston, William C., House
Why it's listed
Ralston Hall is a mansion on the grounds of the College of Notre Dame in Belmont, California. William Chapman Ralston, the San Francisco financier behind the Bank of California and the Palace Hotel, bought a modest villa built by Count Leonetto Cipriani in 1864 and enlarged it into a house of more than eighty rooms. The result is a modified Italian villa whose interior borrows from Mississippi riverboats, with sliding doors, curved walls, skylights, a mirrored ballroom and silver-plated hardware. Ralston entertained leading figures there, including Ulysses S. Grant and Leland Stanford, to showcase California's prospects. After his death in 1875, the estate passed to Senator William Sharon, then served as a girls' school and a private sanitarium. The Sisters of Notre Dame de Namur bought it in 1922 and restored it. A four-foot-thick stone carriage house from about 1874 also survives, the only remaining outbuilding from Ralston's time.
Significance in brief: The house was the country estate of William C. Ralston, the San Francisco financier who founded the Bank of California and built the Palace Hotel. He used the estate to entertain prominent visitors and promote California's potential. The form also notes its Italian villa style with riverboat-inspired interior features, and the surviving stone carriage 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 66000234, listed November 15, 1966. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | College of Notre Dame campus, Belmont |
|---|---|
| County | San Mateo County |
| Listed | November 15, 1966 |
| Reference number | 66000234 |
| Resource type | Building |
| Period of significance | 1864-1875 |
| Architectural style | Modified Italian villa with "steamboat Gothic" interior features |
| Areas of significance | Commerce, Economics, Social History |
| Level of significance | National |
| National Historic Landmark | Yes, designated November 15, 1966 |
| Status (as stated in the nomination) | Restored by the Sisters of Notre Dame and in use as part of the College of Notre Dame; the stone carriage house is also standing and in use. |
| Acreage | 4 |
| Coordinates | 37.51765, -122.28712 (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 66000234.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q7288363
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.