300–330 Mason Street

1. June 27, 1907

   Mahony Bros. contracted to put up a six-storey and basement brick building.

   The San Francisco Call, 27 June 1907, p. 15
2. 1908

   Built.

3. Feb 1985

   Withdrawn Permit 8502047 $$$ $5,000

   Additions alterations or repairs.

4. May 1985

   Permit 8505515 $$$ $45,000

   Legalize rooms for use for hotel and laundry rooms.

5. Jan 1992

   Permit 9200750 $$$ $15,000

   Change sprinklers to quick response.

6. Dec 1992

   Permit 9220681 $$$ $15,000

   Remodel food prep area. reconst opening in bear wall-3rd floor.

7. Dec 1993

   Permit 9321421 $$$ $15,000

   Build two bathroom on main floor.

8. Nov 1997

   Issued Permit 9723412 $$$ $210,000

   Steel frames for side & front (bolts plus with correction).

9. Apr 1998

   Permit 9806983 $$$ $10,000

   Remove tile & old sheetrock from walls & new shower doors.

10. Apr 2001

    Issued Permit M15981 $$$ $360,000

    Street space permit.

11. Oct 2002

    Issued Permit 200210189312 $$$ $22,950

    Remove existing frame, replace with new frame and new cover.

12. May 2003

    Permit 200305164778 $$$ $51,500

    Reroofing.

13. Jul 2003

    Issued Permit 200307038774 $$$ $52,000

    Update current fire alarm system on all floors new panel and devices.

14. Jun 2010

    Permit 201006255330 $$$ $7,000

    Erect a non-electric single faced on existing marquee.

15. May 2011

    Permit 201105115839 $$$ $6,500

    Painted non-structural sign.

16. Feb 2013

    Permit 201302190451 $$$ $80,000

    Remodel 8 bath rooms in kind.

17. Oct 2021

    Issued Permit 202110140436 $$$ $22,000

    Fire only: replace existing fire pump, jockey pump, fire pump controller, jockey pump controller, and backflow preventer.

18. Feb 2025

    Issued Permit 202502110074 $$$ $2,000,000

    Removal and abatement of existing paint on sheet metal and repair on repaint. masonry facade repair. repair existing wood/metal windows in kind. work is facing street and in the public right of way.

19. Dec 2025

    Issued Permit 202512121715 $$$ $75,000

    Cornice maintenance, including steel trussed, wood framing, and brick walls. no visible change to the exterior of the building.

DBI holds 43 permits for this parcel, most of them tenant improvements on individual floors. The timeline shows the 24 largest by stated cost, plus the earliest on file; the DBI query in the sources below returns all 43. 5 of them are nominal $1 street-space or sidewalk permits. 7 expired or cancelled permits are not shown.