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Male, US, born 1868-09-26, died 1962-01-13

Associated with the firms network

Mooser and Milwain, Architects; Mooser and Son, Architects; Mooser, William, Jr., Architect

Professional History


Principal, William Mooser, Architect, San Francisco, CA.

Partner, Mooser and Son, Architects, San Francisco, CA, c. 1896. In 1896, Mooser and Son had an office at 14 Grant Avenue. (See Crocker-Langley San Francisco, California, City Directory, 1896, p. 1700.)

Professional Activties

President, American Institute of Architects (AIA), San Francisco Chapter, San Francisco, CA, 1910.



In 1880, the Mooser Family resided in Alameda, CA. The household included William S. Mooser, Sr., Louise, and siblings Louis, Alice and Albert. His maternal grandmother lived with the family, listed as Sophie Moinet (born c. 1820 in France), as did a domestic servant, Louisa Borla (born c. 1853 in Switzerland). (See, Source Citation Year: 1880; Census Place: Alameda, Alameda, California; Roll: 62; Page: 631A; Enumeration District: 029, accessed 12/13/2018.)

The US Census of 1910 indicated that the Mooser Family lived on Powell Street in San Francisco. (See, Source Citation Year: 1910; Census Place: San Francisco Assembly District 44, San Francisco, California; Roll: T624_102; Page: 4A; Enumeration District: 0304; FHL microfilm: 1374115, accessed 11/20/2017.)

According to San Francisco County voting records of 1916, Mooser lived at 2011 Sacramento Street, and was a registered Republican. The 1920 US Census listed the Mooser Family as continuing to live at 2011 Sacramento Street. William, Jr., was listed as a student living in Paris. (See, Source Citation Year: 1920; Census Place: San Francisco Assembly District 31, San Francisco, California; Roll: T625_136; Page: 16A; Enumeration District: 153, accessed 12/13/2018.)

He was buried at Cypress Lawn Memorial Park, Colma, CA, in 01/1962.


His father was architect, William Sebastien Mooser, (1834-1896), his mother Louise C. Michel (born 1845 in NY- d. 05/30/1921 in San Francisco, CA). They had four children. He siblings included Louis Henry (b. 11/30/1866 in CA-d. 02/19/1946 in San Francisco, CA), Alice Mooser de Saint Germain (born c. 12/1873 in CA), and Albert Henry (born 07/05/1877 in CA-d. 1930).

In 1921, Louis worked as a US Surveyor General in San Francisco, and took a voyage throughout Asia for his work. (See, Source Citation National Archives and Records Administration (NARA); Washington D.C.; NARA Series: Passport Applications: Chicago, New York City, New Orleans, San Francisco and Seattle, 1914-1925; Volume #: Volume 4: Special Series - San Francisco,accessed 11/23/2017.) According to his World War I draft registration card, Albert worked as a bank cashier for the Nevada County Bank, Grass Valley, CA. (See, Source Citation Registration State: California; Registration County: Nevada; Roll: 1531207accessed 11/23/2017.)


He married Mary E. McGreevy Mooser (born 1873 in CA) in c. 1895.


He and Mary had two children, Dorothy M. Mooser (born 04/05/1892 in CA-d. 07/06/1983 in San Francisco, CA) and William Mooser, Jr., (born 11/04/1893 in CA-d. 1962 in San Francisco, CA). William Mooser, Jr., also became an architect, training at the École nationale supérieure des Beaux-Arts between 1911 and 1921.

Associated Locations

PCAD id: 1736