he James C. Flood mansion, built in 1886, was the only Nob Hill manse to survive the 1906 Earthquake and Fire. It barely stood, thanks to its brownstone construction, and was rehabbed by Willis Polk for the Pacific Union Club. They still occupy the building, but don’t even think about trying to get inside. It’s closed-door, only open to today’s whales.

Built in 1878 got James C. Flood, the estate was known as the “wedding cake” or the “white castle.” Sited on 600-acres, it had 40 rooms filled with fancy decorations and art. His daughter, Jennie Flood, eventually gave the estate to the University of California, but they couldn’t really afford to take care of it, and sold it back to James L. Flood. He always left the gates open so the public could visit and enjoy the estate. The house was torn down in 1934, and the estate subdivided in 1938, part for a county park and the rest for (now very expensive) home sites. The gates still remain.

After his father’s house was damaged in the 1906 Earthquake, James L. Flood built his own mansion designed by architects Bliss & Faville 1912. After he died, his wife Maud Flood gave the home to the Religious of the Sacred Heart, and it is now part of the Broadway campus of Schools of the Sacred Heart.

Built in 1941 for James C. Flood’s grandson, the 92-acre Colonial Revival estate has a Thomas Church-designed garden (among loads of other perks). Flood's great-grandchildren still own it, but are selling the estate for a cool $85M.

James L. Flood had the mansion built in 1900, before moving down the street to his mansion at 2222 Broadway. He gave the house to his sister Jennie, who later gifted it to the University of California. In 1927, it became the Sarah Dix Hamlin School for girls, and had remained so ever since.

, himself a wealthy banker from of the Bank of California, on the 500 block of Sutter Street. It’s now the site of commercial and office buildings.

O’Brien’s niece Pauline inherited much of his money, and used it to build a house in 1881 designed by architect William F. Curlett. It was advanced for its day, with hot and cold running water, central heating, and bathrooms integrated into the house (luxury!). It's now listed on the National Register of Historic Places.

The Fairmont was designed by the Reid Brothers in 1906, and though it survived the earthquake, Julia Morgan was hired to repair the badly damaged interior. And you know the rest.

Also known as the Kohl Building, it was designed by George Percy and Willis Polk in the shape of a giant H. Built in 1901, it was one of the first fireproof buildings and survived the 1906 Earthquake and Fire.

Home to William Sr., the house was designed by Willis Polk. The site is now apartment buildings.

William II’s house was also designed by Willis Polk. The seriously neglected and spooky house was home to eccentric Arden Van Upp for many years. It was purchased in 2010 for $2,790,000.

Willis Polk also designed the 715 acre estate along Crystal Springs Lake in 1915. The name Filoli comes from the first two letters of Fight, Love, Live from Bourn’s personal credo: “To fight for a just cause; to love your fellow man; to live a good life”. The Bourn family still owns the family’s five-acre burial plot on the estate. Filoli and its furnishings were sold to the Roth family in 1937, who expanded the gardens. In 1975 Mrs. Roth gifted the house and garden to the National Trust for Historic Preservation along with an endowment to support the maintenance of the property.

Also designed by Willis Polk, the Bourn’s cottage at the Empire Mine was built in the Tudor style with Arts and Crafts interiors in 1897. It’s now part of the Empire Mine State Historic Park, which contains many of the original mine buildings and the entrance to 367 miles of abandoned and flooded shafts and tunnels.

Built in 1924 and designed in the Spanish colonial revival style by George Washington Smith on 17-Mile Drive for Bourn’s daughter Maud Vincent. It’s still standing, but has had a boatload of additions built on.