The Haas–Lilienthal House is a historic building located at 2007 Franklin Street in San Francisco, California, United States, within the Pacific Heights neighborhood.

[3][4][5] William Haas (1849–1916) was born in Reckendorf, Bavaria from a Jewish family and came to San Francisco in October 1868, rapidly establishing himself as a successful businessman.

Well integrated within the affluent local Bavarian Jewish community, the couple lived in a number of different residences after their marriage before finally building a grand mansion for themselves and their children.

The third story, or attic, which contained a spacious redwood-paneled playroom, gym, storage room, and servants’ quarters for the cook and maids, now[when?]

[citation needed] In November 2023, citing financial difficulties, SF Heritage closed the museum and terminated three of its four employees, envisaged a reopening for spring 2024.

[11][12] Built of redwood,[13] the building follows the locally popular row-house plan, developed to maximise the use of space in deep, narrow hillside lots.