1886 Connecticut-brownstone mansion of Comstock silver baron James C. Flood — the first brownstone west of the Mississippi and the only Nob Hill mansion whose structure survived the 1906 earthquake and fire; home of the private Pacific-Union Club since 1912.
1000 California Street, San Francisco, CA 94108
Research updated June 2026
Age
View from public sidewalk only
Cost
Free
Building is a private members-only club. Not open to the public; view exterior from California Street only.
Access
Wheelchair OK
Public sidewalks on the Nob Hill streets surrounding the building; the building itself is closed to non-members.
Equipment
Photos OK
Est. 1886 · First brownstone constructed west of the Mississippi River · Only Nob Hill mansion whose structure survived the 1906 earthquake and fire · Built for Comstock silver baron James C. Flood · Home of the Pacific-Union Club since 1912 · National Historic Landmark (1966) · Remodeled by Willis Polk
James C. Flood (1826-1889) was one of the four 'Bonanza Kings' of the Comstock Lode silver-mining boom in Nevada, alongside John Mackay, James Fair, and William O'Brien. His Big Bonanza strike of 1874 made him one of the wealthiest men in 19th-century America. Flood used a portion of his fortune to build a Nob Hill mansion that would announce his arrival among San Francisco's social elite.
The mansion was designed by architect Augustus Laver and constructed between 1885 and 1886 (some sources cite construction completing in 1888) of precut Connecticut brownstone shipped to California via Cape Horn — a substantial logistical undertaking, as no significant brownstone quarries existed west of the Mississippi at the time. The building was the first brownstone constructed west of the Mississippi River and cost approximately $1.5 million, making it the most expensive private residence ever built on the West Coast at that point.
Flood died in 1889 and the mansion was occupied by his daughter Cora Jane Flood during the years leading up to the 1906 San Francisco earthquake. On April 18, 1906, the catastrophic earthquake and the four-day fire that followed destroyed most of Nob Hill — including the wood-framed mansions of fellow Bonanza Kings James Fair, John Mackay, and Mark Hopkins, and the wood-framed mansions of railroad magnates Leland Stanford and Collis Huntington. The Flood Mansion's heavy brownstone walls structurally survived; only the interior was gutted by fire.
The Cora Flood family sold the shell to the Pacific-Union Club, San Francisco's elite men's social club, which had been searching for permanent quarters. The Club commissioned architect Willis Polk to design the interior renovation; Polk added a third floor, designed a new interior in a Beaux-Arts style, and brought additional brownstone from the same Connecticut quarries as the original construction. The remodeled mansion opened as the Pacific-Union Club's clubhouse in 1912.
The Pacific-Union Club has continued in occupancy ever since. The Flood Mansion was declared a National Historic Landmark in 1966. The building is closed to non-members and is one of the most architecturally significant — and most private — surviving 19th-century buildings in San Francisco.
Sources
The Flood Mansion / Pacific-Union Club is included in San Francisco ghost-tour materials — including US Ghost Adventures' Pacific-Union Club page and Tours of the Tales' Flood Mansion entry, along with the Inside Guide to San Francisco haunted-places compilation — but its paranormal record is intrinsically thin because the building is a closed private men's club and independent observation of paranormal phenomena inside the building is essentially impossible.
The most-cited ghost story is of an elderly male figure described as wandering the corridors and the library of the building, generally identified by ghost-tour narrative as James C. Flood himself. The story typically pairs Flood's identification with cold spots and unexplained footsteps reported by Club staff in unoccupied rooms. Tour narratives describe the figure as benign and tied to the building's Gilded-Age original ownership.
The key honest framing for this entry is that the Pacific-Union Club, as a private membership organization, does not give media interviews about staff accounts and does not allow paranormal investigators to access its premises. The accounts of cold spots and footsteps that appear in ghost-tour materials are essentially second- or third-hand reports filtered through the historic-tour industry; we have not been able to locate direct first-person accounts from named Club staff in publicly available sources.
The combination of the building's exceptionally rich documented history (Bonanza Kings era, 1906 survival, Willis Polk renovation), the consistent narrative anchor of Flood himself, and the impossibility of independent corroboration makes the Pacific-Union Club a case where the paranormal lore is well-established in San Francisco tour literature but lightly substantiated in independent observational record. Treat the Flood-apparition story as San Francisco folk-paranormal narrative rather than as documented phenomena.
This venue is a private members-only club and not open to the public — appreciate from the public sidewalk on California Street only.
Notable Entities
View the Flood Mansion from California Street at the top of Nob Hill. The brownstone is the only original Nob Hill mansion whose structure survived the 1906 earthquake and fire and is one of the most architecturally significant 19th-century buildings in San Francisco. The interior is closed to all non-members.
Every HauntBound history is researched from documented sources. We clearly separate verified historical fact from paranormal folklore.
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