Where NYC offices are being built out

Interior build-outs permitted by the Department of Buildings in the 12 months to September 28, 2026, across the 1,277 large office, retail and industrial buildings Leasemark tracks. New interior work usually follows a lease, so this is a rough map of where tenants are moving in.

Build-outs, 12 months
3,056
In office buildings
2,947
Buildings with a build-out
728 of 1,277
Floors with work
4,704
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NYC Department of Buildings permits

Neighborhoods ranked by build-outs, last 12 months

Interior build-outs first permitted in each neighborhood's tracked buildings, most first, with how many of those buildings had one. Each links to the neighborhood's own build-out section. Not ranked, with fewer than 5 large buildings tracked: Bay Ridge, Bed-Stuy, Crown Heights, Flatbush, Jackson Heights, Park Slope and Washington Heights.

  1. 1Midtown1,132
    199 of 240 buildings (83%) · 1,790 floors with work
  2. 2Financial District341
    74 of 99 buildings (75%) · 724 floors with work
  3. 3Grand Central270
    48 of 59 buildings (81%) · 378 floors with work
  4. 4Garment District239
    59 of 90 buildings (66%) · 384 floors with work
  5. 5Midtown South219
    60 of 81 buildings (74%) · 364 floors with work
  6. 6Hudson Yards123
    16 of 25 buildings (64%) · 135 floors with work
  7. 7Flatiron109
    28 of 38 buildings (74%) · 140 floors with work
  8. 8SoHo91
    29 of 36 buildings (81%) · 105 floors with work
  9. 9Downtown Brooklyn63
    27 of 58 buildings (47%) · 118 floors with work
  10. 10Murray Hill62
    17 of 22 buildings (77%) · 112 floors with work
  11. 11Union Square54
    21 of 27 buildings (78%) · 59 floors with work
  12. 12Times Square53
    12 of 15 buildings (80%) · 68 floors with work
  13. 13Long Island City43
    20 of 86 buildings (23%) · 52 floors with work
  14. 14Meatpacking38
    9 of 13 buildings (69%) · 38 floors with work
  15. 15NoHo29
    9 of 9 buildings (100%) · 30 floors with work
  16. 16Tribeca25
    10 of 21 buildings (48%) · 38 floors with work
  17. 17Upper West Side25
    7 of 11 buildings (64%) · 35 floors with work
  18. 18Sunset Park15
    7 of 15 buildings (47%) · 14 floors with work
  19. 19South Bronx15
    6 of 35 buildings (17%) · 13 floors with work
  20. 20Flushing13
    9 of 16 buildings (56%) · 13 floors with work
  21. 21Greenpoint12
    7 of 16 buildings (44%) · 9 floors with work
  22. 22Hell's Kitchen11
    7 of 17 buildings (41%) · 14 floors with work
  23. 23Chelsea11
    5 of 10 buildings (50%) · 12 floors with work
  24. 24Dumbo10
    6 of 16 buildings (38%) · 9 floors with work
  25. 25Fordham10
    5 of 7 buildings (71%) · 9 floors with work
  26. 26Hunts Point7
    5 of 13 buildings (38%) · 6 floors with work
  27. 27Jamaica6
    5 of 27 buildings (19%) · 6 floors with work
  28. 28Williamsburg5
    3 of 9 buildings (33%) · 8 floors with work
  29. 29Harlem5
    4 of 16 buildings (25%) · 4 floors with work
  30. 30Red Hook5
    3 of 14 buildings (21%) · 4 floors with work
  31. 31Bushwick4
    3 of 42 buildings (7%) · 4 floors with work
  32. 32Gowanus3
    1 of 17 buildings (6%) · 4 floors with work
  33. 33Maspeth3
    3 of 43 buildings (7%) · 1 floor with work
  34. 34Upper East Side2
    1 of 6 buildings (17%) · 2 floors with work
  35. 35Astoria1
    1 of 5 buildings (20%) · 1 floor with work
  36. 36Ridgewood0
    0 of 6 buildings (0%) · 0 floors with work

No build-outs permitted in the tracked buildings of Ridgewood.

By quarter and borough

3,043 build-outs in the last four quarters (the newest through September 28, 2026), against 2,986 in the four before.

Build-outs by quarter, all tracked buildings

  • Q4 2024772
  • Q1 2025763
  • Q2 2025717
  • Q3 2025734
  • Q4 2025716
  • Q1 2026833
  • Q2 2026779
  • Q3 2026 to Sep 28715
BoroughBuild-outsBuildings with one
Manhattan2,839615 of 837
Manhattan office2,802600 of 799
Brooklyn11858 of 200
Brooklyn office8839 of 97
Queens6739 of 185
Queens office4624 of 61
Bronx3216 of 55
Bronx office117 of 17

Most build-outs, last 12 months

  1. One Penn Plaza, 250 West 34th Street35
    26 floors with work · Garment District
  2. 383 Madison Avenue28
    45 floors with work · Grand Central
  3. 277 Park Avenue27
    22 floors with work · Midtown
  4. 1250 Avenue of the Americas25
    70 floors with work · Midtown
  5. 1251 Avenue of the Americas24
    23 floors with work · Midtown
  6. Radio City Music Hall, 1260 Avenue of the Americas24
    17 floors with work · Midtown
  7. W. R. Grace Building, 1114 Avenue of the Americas22
    18 floors with work · Midtown
  8. Empire State Building, 338 Fifth Avenue21
    86 floors with work · Midtown South
  9. 200 Liberty Street19
    18 floors with work · Financial District
  10. 99 Park Avenue19
    14 floors with work · Grand Central

Newest build-outs

  • 101 Barclay StreetSep 28, 2026Floors 1 to 4, cellar, mezzanine; mechanical; est. $2.8 million · Financial District
  • 1372 BroadwaySep 28, 2026Floors 1 and 14, cellar; construction; est. $6.6 million · Garment District
  • 390 Madison AvenueSep 28, 2026Floor 28; construction; est. $100,000 · Midtown
  • 730 Third AvenueSep 28, 2026Floor 3; construction, mechanical; est. $1.4 million · Midtown
  • 850 3rd AvenueSep 28, 2026Floor 6; construction; est. $75,000 · Sunset Park
  • 101 Barclay StreetSep 25, 2026Floors 3 and 4; construction, mechanical; est. $2.1 million · Financial District

Questions about NYC build-outs

Where are offices being built out in NYC?

In the 12 months to September 2026, the most interior build-outs among the large buildings Leasemark tracks were in Midtown (1,132 in 199 buildings), the Financial District (341 in 74 buildings) and Grand Central (270 in 48 buildings), together 57% of the city total. 2,947 of the 3,056 build-outs were in office buildings.

How many office build-outs were permitted in NYC in the last year?

The Department of Buildings issued first permits for 2,947 interior build-outs in 670 of the 974 large office buildings Leasemark tracks in the 12 months to September 28, 2026, with work permitted on 4,589 floors in all. Across all 1,277 tracked buildings (office, retail and industrial) the count is 3,056. Smaller buildings are not counted.

Which NYC buildings have the most build-outs?

One Penn Plaza, 250 West 34th Street (35), 383 Madison Avenue (28) and 277 Park Avenue (27) had the most interior build-outs first permitted in the 12 months. Large multi-tenant towers lead because every new tenant or floor renovation files its own work.

Is build-out activity in NYC going up or down?

Across the tracked buildings, 3,043 build-outs were first permitted in the last four quarters (the newest through September 28, 2026), against 2,986 in the four quarters before, about the same. Permits trail lease signings by a few months, so this is a lagging sign of leasing, not a forecast.

What counts as a build-out here?

Interior work filed with DOB NOW (general construction, mechanical, plumbing, sprinklers, standpipe, structural or boiler work) on the same floors of a building and first permitted within 120 days of each other counts as one build-out, dated by its first permit. Facade, sidewalk shed, scaffold and fence jobs never count. A permit is approval to do the work; it does not say who the work is for or whether it is finished.

Where does this data come from?

NYC Department of Buildings, DOB NOW: Build Approved Permits (NYC Open Data), pulled 2026-09-30 with permits issued through 2026-09-28, joined by tax lot to the 1,277 large commercial buildings on Leasemark (at least 100,000 square feet of commercial space in Manhattan, 50,000 elsewhere). Jobs filed in the older BIS system are not included. Costs are the estimates filed with the jobs.

Source: NYC Department of Buildings, DOB NOW: Build Approved Permits, pulled 2026-09-30 (permits issued through 2026-09-28). A build-out groups interior jobs on the same floors first permitted within 120 days of each other, dated by its first permit; renewals are not new work. Only the large buildings Leasemark tracks count (100,000 SF and up in Manhattan, 50,000 SF and up elsewhere), not every permit in the city. Costs are the estimates filed with the jobs. A permit does not say who the work is for.

Buildings

Office space

Busiest neighborhoods