555 De Haro Street
Potrero Hill · San Francisco, CA 94107
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1935
Built as the Pioneer Soap factory.
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1943
Occupied by the Pioneer Soap factory by 1943.
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Oct 1981
Additions alterations or repairs.
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Jul 1985
Remodeling of lobby and star areas.
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Jan 1991
Cti-1.
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May 1992
Office space/walls.
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Nov 1992
Paint recarpet remove intr walls & replace with new n/l bearing.
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Jan 2000
Install antennas and equipment on rooftop.
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Dec 2003
Oti-1 1st floor, el, me, ls, sp demolition walls, built partition walls & two ada restrooms.
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Dec 2005
Install 3 panel antennas enclosed within new 4 chimney painted to match existingsprint chimneys.install equipment cabinets & new concrete pad adjacent to existingsprint enclosure.install new wood equipment enclosure indentical to existing enclosure.install new wiring & cable tray connecting equip to antennas.
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Apr 2012
Att: wireless facility to propose 9 antennas behind radio frequency transparant screening, equipment placed on ground behind wood fence.
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Sep 2012
Sprint wireless modification. replace (4) existing panel antennas with (3) new antennas within existing radome on roof; replace (3) existing equipment cabinets with (2) new equipment cabinets in existing equipment shelter on ground level.
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Mar 2014
Unmanned telecommunications facility consisting of 9 antennas inside frp boxes and related equipment. compliance with ord 155-13 not required.
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Sep 2014
Modification to existingsprint cell site.remove 3existing antennas & radomes. all antennas to be screened in faux chimneys. 2existingantennas reinstalled & 2 2.5 ghz antennas added-1 per sector.1 new triband antenna installed for a total of 5 sprint antennas.add rrh & 2.5 equipment.
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Jan 2017
Voluntary ada upgrade includes: grading of site for accessible slopes- new ada parking stall. new parking stripping and path of travel work. new access ramp entry. replace inkind wood deck at main entry and adjacent suite. n/a for maher.
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Oct 2018
At&t r&r 6existing antenna with new. install 9 new rrus and other small equip. remove 6 existing rrus. install 2 new batteries in existing cabinet.
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Aug 2019
Demolition of nonstructural existing interior partitions on 1st floor. per ab-017 space to remain vacant until all accessible features are restored. n/a for maher - no ceiling work.
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Aug 2019
T-mobile replace 3 antennas, add 3 rrus and 1 hybrid cable.
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Oct 2019
T.i. of existing space for light manufacturing use. work includes non-structural walls and doors, new breakroom, lobby, bathrooms. mep and sffd sprinklers on seperate permits. n/a for maher.
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Jan 2020
1st fl - hvac improvments. ref permit application 201910295829.
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Jul 2020
2nd fl - change of use (pdr to lab) ti remodel of existing 12, 378 sq ft of interior space for lab, demonstration space, offices, conference rooms, shower and existing toilet.
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Sep 2020
Mechanical duct installation throughout the suite.
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Sep 2020
2/f: adding notification devices. ref t.i. pa202007019423. maher n/a.
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Jan 2022
T-mobile: swap (3) existing antennas, install (3) new antennas, install (3) new rrus, remove existing 3 radome and replace with new 3'-6" radome, remove (1) existing cabinet: install (2) new cabinets. remove existing batteries: install new batteries install new 100a breaker.
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Apr 2022
At&t modification unmanned telecom facility. remove/replace (6)panel atennas with in existingfrp faux vents, remove (3)ruus's/(3)existing #8awg dc power trunks, install (3)new #4awg dc power trunks, (3)new fiber truns, new rf safety signs, barriers/tripping @ rooftop. install (4)new rectifiers in existingdcpp &.
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Dec 2025
At&t: modification of an existing unmanned wireless facility. remove and replace 3 antennas behind frp screening, rf safety stripping, signs & barricade. remove (1) infinity pp with rectifiers and cabinets. install 1 vertiv battery cabinet with 12 relocated 210ah batteries. (1) netsure pp with (4) new (210ah).
DBI holds 54 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 54. 7 of them are nominal $1 street-space or sidewalk permits.
The survey's data table dates the building to 1935; its own note says the factory was built between 1929 and 1940. Not yet documented: the architect and builder and the early tenants. The assessor dates the building to 1895; the city's 2011 survey of Showplace Square and the northeast Mission dates it to 1935. Submit an update