400 Post Street

1. 1909

   Built.

2. 1909

   Built for the Argonaut Club, an early Jewish club formed at a time when antisemitism kept Jews out of the city's other private clubs. Unusually for a private club, it has shopfronts at street level.

   Citywide Historic Context Statement: Clubs and Social Halls (1848–1989), 2026
3. 1924

   A fourth storey was added, by the architect of the original building.

   Citywide Historic Context Statement: Clubs and Social Halls (1848–1989), 2026
4. Dec 1982

   Additions alterations or repairs.

   Complete Permit 8210137 $$$ $10,000
5. Dec 1990

   Vertical addition.

   Complete Permit 9025250S $$$ $8,000,000
6. Mar 1994

   Install air cooled ac unit, water heating coil, hot water.

   Expired Permit 9403852 $$$ $100,000
7. Mar 1994

   Interior tenant uild-out.

   Complete Permit 9404086 $$$ $600,000
8. May 1994

   Const partitions ceiling finishes lighting extend existing plumb.

   Expired Permit 9407477 $$$ $1,200,000
9. Jun 1994

   Retail tenant improvement.

   Complete Permit 9409557 $$$ $500,000
10. Jun 1994

    Fire protection tenant improvement.

    Complete Permit 9410265 $$$ $80,000
11. Oct 1994

    Revision to appl #9407477, bookcase 5'9" in height.

    Complete Permit 9417510 $$$ $100,000
12. Jun 2004

    Removing 1-hr rated grease duct work enclosure replacing the existing black steel welded ductwork.

    Expired Permit 200406095945 $$$ $70,000
13. Oct 2008

    Selective demolition of existing interior walls. construction of new demising wall and exit stair along with associated hvac, lighting and plumbing work. life safety under seperate permit.

    Complete Permit 200810023202 $$$ $185,000
14. Oct 2008

    Demolition (selective) expansion of existing restaurant and lounge onto 1st floor space. associated construction millwork, finishes, mechanical, plumbing, electrical, fire protection, structural work under appl. 200810023202. fire protection under separate permit.

    Complete Permit 200810144060 $$$ $1,500,000
15. Mar 2009

    Remodel of e restaurant including interior demolition of existing restaurant at basement level and construction of all tenant improvement elements including partitions, casework. lighting, electrical, plumbing, finishes, kitchen, restrooms. no structural work.

    Cancelled Permit 200903053457 $$$ $750,000
16. Aug 2010

    New drywall partition, multifold doors, lighting, electrical, mechanical and sprinkler work to existing restaurant on lower level (below street level) sprinklers under separate permit. establishing occupant load.

    Complete Permit 201008279733 $$$ $300,000
17. Sep 2011

    Install new at&t (12) outdoor panel antennas to be mounted on existing sign structure on rool. paint to match existing sign. (8) at&t equip cabinets to be mounted on new equip platform on existing roof. antenna coaxial transmisiion lines from bts to qntennas. power to telco service provided from existing sources.

    Complete Permit 201109144582 $$$ $124,000
18. Oct 2011

    Building alteration - minor: replacement of storefront system, entrances & bulkhead, addition of canopy at corner of building. replace a portion of existing sidewalk in r.o.w. to meet accessibility codes.

    Issued Permit 201110217364 $$$ $400,000
19. Oct 2011

    Interior retail tenant improvement work includes minor demolition; new partitions, dumbwaiter shaft enclosure, doors & frames, finishes, lighting, electrical & mechanical, new restroom fixtures & finishes. sprinklers & fire alarm under separate permit.

    Complete Permit 201110257611 $$$ $1,892,000
20. Nov 2011

    3, 820 sq ft ground fl tenant improvemt for new banking ctr incl new atms cust areas, teller line, offices, employee break areas, restrm & back of house support spaces. work includes struct, electrical, mechanical, plumbing & finishes. related work under separate permit app for ext/storefront: ref #201110217364.

    Complete Permit 201111018054 $$$ $960,000
21. Dec 2012

    Ti. retail store minor demolition & new construction. new work includes partitions, finishes, relocating light fixtures, painting & casework on ground & second floor.

    Complete Permit 201212186428 $$$ $175,000
22. Jul 2022

    Att modification of unmanned telecome facility consisting of 3 panel antennas, new rf safety signs, barriers, triping roof. remove 20 batteries install new within existing, new batteries new vertiv battery rack.install new flx21 purcell cabinet w bbu, 6 new rectifiers within exostog dcpp cabinet.

    Complete Permit 202207289436 $$$ $75,000
23. Jun 2023

    Demolition or removal of existing flooring, existing interior partition walls, existing interior glazing, existing hvac ducts & diffusers, existing wall cladding, existing casework, existing light fixtures, existing electrical conduits. all finishesto be removed back to base structure. no storefront work under this permit.

    Complete Permit 202306210533 $$$ $120,000
24. Jul 2025

    Non structural demolition of an interior space. removal of existing demising wall between the spaces. demolition shall include removal of non-structual partition walls, finishes and fixtures. no change to existing building envelope/storefront. no change in use. no lighting fixtures.

    Issued Permit 202507160918 $$$ $43,000
25. Dec 2025

    At&t modification wireless facility consisting of: remove 9 antennas within existing frp structure; install 7 antennas; r/r rru's; remove 6 tma; remove 3 cabinets; install 2 omnion cabinets with rectifiers + converters; & (1) 15amp, 6 (50) amp + (3) 25 amp dc breakers.

    Issued Permit 202512030814 $$$ $80,300
26. Feb 2026

    Interior tenant improvement of an existing 4 story commercial/retail building. includes a new elevator to be under state agency review.no change in building area and no change to building use. exterior permit/scope is under a separate permit. demolition is under permit 2025-0716-0918.

    Approved Permit 202601284699 $$$ $650,000
27. Feb 2026

    Selective demolition in prepation for new vertical transportation: passenger elevator, demolition of existing elevator & machine room assemblies. freight elevator: selective demolition of floor & roof asscemblies. escalators: removal of four levels of escalotor equipment & the 1st level strc truss.

    Filed Permit 202602125881 $$$ $50,000
28. May 2026

    Exterior tenant improvement of existing retail space. interior under sep permit and signage under sep permit. exterior work includes new storefront system at gr gl with new canopy and facade maintenance. demolition under 202507160918. no change of use or occupancy.

    Filed Permit 202605211684 $$$ $75,000

DBI holds 133 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 133. 23 of them are nominal $1 street-space or sidewalk permits.