37.7861, −122.3999 A locator map appears here once a Mapbox token is configured.
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District 6 · Block 3722, Lot 013 · ZIP 94105

Underwriters Fire Patrol Building

147–149 Natoma Street

  • Industrial building
  • 3 stories
  • 3,197 ft2 lot area
  • 13 rooms
  • 3 bathrooms
  • Zoned C3OSD
  • Historic resource
37.7861, −122.3999 Street View appears here once a Google Maps embed key is configured.
  1. 1875

    Headquarters of the Underwriters' Fire Patrol, founded in San Francisco in 1875 as a private fire-fighting company with its own firehouses, alarm systems and firemen trained to salvage materials, engaged by insurance companies to hold down premiums and settlements. The patrol was absorbed into the San Francisco Fire Department in 1943.

    Central SoMa Historic Context Statement, adopted 2016
  2. 1909

    Built as the Underwriters Fire Patrol Building.

    Transit Center District Survey, adopted 2012
  3. May 1982
    Permit 8203801 $$$ $8,300

    Additions alterations or repairs.

  4. Mar 1993
    Permit 9304572 $$$ $3,000

    Remove partition walls/install two doors (no structural).

  5. Apr 1993

    Hardship for bathroom.

  6. 2008

    Recorded in the city's 2008 survey of the Transit Center District, adopted in 2012, as a contributor to the proposed New Montgomery, Mission & Second Historic District.

    Transit Center District Survey, adopted 2012
  7. Feb 2012
    Issued Permit 201202295105 $$$ $1,800

    Install 1 panel, 6 smoke detectors and 3 relays for elevator recall/modern station.

  8. May 2026
    Filed Permit 202605131157 $$$ $15,000

    Replacing and modifying the sidewalk, as well as modifying the sub-sidewalk basement to accommodate the new sidewalk grades.

1 nominal $1 street-space or sidewalk permit is omitted from the timeline. 3 expired permits are not shown.

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