Manhattan

Large commercial buildings in Flatiron

Every office, retail and industrial building in Flatiron with at least 100,000 square feet of that space, from the city's own tax lot records. Open one for its size, age, zoning and any space listed in it.

Buildings
38
Their floor area
9.0M SF
Largest
1 Madison Avenue
  1. 1 Madison AvenueOffice building · 1.2M SF office · 26 floors · built 1932
  2. 1097 BroadwayOffice building with commercial space · 586K SF office · 15 floors · built 1909
  3. 35 Madison AvenueOffice building · 520K SF office · 43 floors · built 1971
  4. 354 Park Avenue SouthOffice building · 439K SF office · 21 floors · built 1913
  5. 40 West 23rd StreetOffice building with commercial space · 360K SF office · 12 floors · built 1911
  6. 315 Park Avenue SouthOffice and commercial building · 344K SF office · 20 floors · built 1911
  7. 902 BroadwayOffice building · 310K SF office · 20 floors · built 1913
  8. 49 West 23rd StreetOffice building with commercial space · 300K SF office · 12 floors · built 1916
  9. 37 West 22nd StreetOffice building with commercial space · 263K SF office · 13 floors · built 1906
  10. 351 Park Avenue SouthOffice building with commercial space · 217K SF office · 12 floors · built 1913
  11. 620 Avenue of the AmericasOffice condominium · 211K SF office · 7 floors · built 1900
  12. 881 BroadwayOffice building with commercial space · 208K SF office · 7 floors · built 1896
  13. 11 West 19th StreetOffice building with commercial space · 207K SF office · 11 floors · built 1904
  14. 120 East 23rd StreetOffice building · 201K SF office · 12 floors · built 1913
  15. 675 Avenue of the AmericasOffice building with commercial space · 200K SF office · 6 floors · built 1902
  16. 915 BroadwayOffice building · 197K SF office · 20 floors · built 1926
  17. 257 Park Avenue SouthOffice condominium · 190K SF office · 20 floors · built 1913
  18. 109 Fifth AvenueOffice building with commercial space · 189K SF office · 13 floors · built 1895
  19. 125 West 18th StreetOffice building with commercial space · 189K SF office · 8 floors · built 1917
  20. 53 East 25th StreetOffice building · 185K SF office · 16 floors · built 1913
  21. 171 Fifth AvenueOffice building · 175K SF office · 21 floors · built 1903
  22. 154 Fifth AvenueOffice building with commercial space · 169K SF office · 14 floors · built 1895
  23. 148 Fifth AvenueOffice building with commercial space · 168K SF office · 11 floors · built 1890
  24. 149 Fifth AvenueOffice building with commercial space · 166K SF office · 16 floors · built 1918
  25. 23 West 18th StreetOffice building with commercial space · 166K SF office · 11 floors · built 1902
  26. 47 West 17th StreetOffice building with commercial space · 165K SF office · 12 floors · built 1907
  27. 304 Park Avenue SouthOffice building with commercial space · 159K SF office · 12 floors · built 1930
  28. 18 West 18th StreetOffice building with commercial space · 158K SF office · 11 floors · built 1904
  29. 286 Park Avenue SouthOffice building with commercial space · 148K SF office · 14 floors · built 1911
  30. 20 West 22nd StreetOffice building with commercial space · 144K SF office · 16 floors · built 1911
  31. 695 Avenue of the AmericasRetail building · 125K SF retail · 5 floors · built 1889
  32. 111 West 19th StreetOffice building with commercial space · 125K SF office · 8 floors · built 1901
  33. 641 Avenue of the AmericasOffice building with commercial space · 122K SF office · 8 floors · built 1902
  34. 15 West 21st StreetOffice building with commercial space · 117K SF office · 12 floors · built 1910
  35. 54 West 21st StreetOffice building with commercial space · 110K SF office · 12 floors · built 1910
  36. 130 Fifth AvenueOffice building with commercial space · 104K SF office · 11 floors · built 1903
  37. 19 West 21st StreetOffice building with commercial space · 103K SF office · 12 floors · built 1908
  38. 242 Park Avenue SouthOffice building with commercial space · 103K SF office · 12 floors · built 1911

Source: NYC Department of City Planning, PLUTO 26v2, pulled 2026-09-26. Sizes count each building's largest use (office, retail or industrial). Boundaries are approximate: each tax lot counts toward one neighborhood only. Only buildings with a street number and a leasable commercial building class are included.

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