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21st Amendment Brewery

21st Amendment Brewery

2010 Williams Street
San Leandro, CA 94577
United States
(510) 595-2111
Additional Information 

Tap Room Hours Tue-Thu, 3-9pm Fri-Sat, 12pm-10pm Sun, 12pm-7pm

Other Locations

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San Francisco Pub & Restaurnat
563 2nd Street
San Francisco, CA 94107
United States
Hours of Operation 

Pub Hours
Mon-Sat*, 11:30am-12am
Sun, 10am-12am
*During Giants baseball season, our Pub opens at 11am Mon – Sat for Giants’ daytime home games.


The Company

In 2000, Nico Freccia and Shaun O’Sullivan founded the 21st Amendment Brewery in San Francisco’s historic South Park neighborhood. The popular brewpub is now at the heart of the new city center, just south of the financial district and only two blocks from the San Francisco Giants baseball park. In addition to rotating taps of multiple award-winning hand-crafted house beers, the pub has been voted “Best Brewpub”, “Best Burger” and “Best Happy Hour” by the San Francisco press.

Freccia and O’Sullivan met in early 1995 in San Francisco. Both had just moved from southern California to the Bay area when they heard the calling of beer. O’Sullivan, a former photographer and paralegal, “traded his suits for boots and was saved by beer”. He moved to Berkeley and took a job as assistant brewer at the Triple Rock Brewery there. Freccia, a writer, actor and, by extension, restaurant professional, was also an avid homebrewer. Frustrated with the lack of beer culture in the L.A. area, he moved to San Francisco and began writing for the Celebrator Beer News, the west’s largest beer publication. Freccia and O’Sullivan met, became friends and, while sitting together in a summer class on brewing science at UC Davis, hatched their plan for what would become the 21st Amendment.