Estudillo Mansion
Why it's listed
Francisco Estudillo's mansion at 150 S. Dillon in San Jacinto is a two-story brick house in the Italianate style, with a symmetrical facade, segmental-arched windows, a truncated hip roof with wood shingles, and ornate brackets under the eaves. A one-story rear extension was added around 1940. It stands on a 5.39-acre lot with mature trees, a formal hedged garden, and an early carriage house. Estudillo inherited part of his family's Mexican land grant in the San Jacinto Valley and became a leading developer. His land company offered the railroad a free right-of-way and depot site, helping make the new town of San Jacinto the valley's center. He also served as mayor and later as a federal Mission Indian Agent. The house was damaged by the 1992 Landers earthquake, then retrofitted by the city, which now owns it. Its original wraparound porch was removed and is being prepared for reconstruction. The period of significance is 1885 to 1901, the years he lived here.
Significance in brief: The nomination argues significance under Criterion B for its association with Francisco Estudillo, heir to the family's Mexican land grant in the San Jacinto Valley. He became a leading developer and held local offices. The mansion and the adjacent railroad depot, built on land he donated, became the center of growth for the new town of San Jacinto.
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 01001178, listed October 25, 2001. Summary generated October 2026 (model claude-sonnet-5-5, prompt v1.0-2026-10-29, confidence medium).
Key facts
| Address | 150 S. Dillon, San Jacinto |
|---|---|
| County | Riverside County |
| Listed | October 25, 2001 |
| Reference number | 01001178 |
| Resource type | Building |
| Period of significance | 1885-1901 |
| Architect / builder | Bacon & Ashenfelter |
| Architectural style | Italianate |
| Criteria |
|
| Areas of significance | Exploration/Settlement, Politics/Government |
| Level of significance | Local |
| Status (as stated in the nomination) | Damaged in the 1992 Landers earthquake; seismic retrofit completed April 2000, with porch reconstruction and interior restoration still under way. Owned by the City of San Jacinto. |
| Acreage | 5.4 |
| Coordinates | 33.78102, -116.96812 (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 01001178.
- Nomination form (PDF, National Archives) — catalog entry
- Wikipedia article (used for cross-checking only; text not reproduced here)
- Wikidata Q133441001
- This listing as JSON
Last updated October 2026. Found an error? See the editorial policy for how to report it.