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Building record · BIN 3007091

409 Union Street

409 Union Street, Brooklyn, NY 11231

A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 10 independently sourced records, including 4 that are not recorded as completed, closed or withdrawn.

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BUILDING RECORD · BIN 3007091

409 Union Street

Carroll Gardens-Cobble Hill-Gowanus-Red Hook, Brooklyn

A consolidated public-record view · updated Mar 7, 2024

DOB filings
10
Active-status
4
Recorded addresses
1
Building data portrait

A building-level summary of matched filings, active-status records and published identifiers.

Matched filings10
Open or active-status records4
First included filingJul 15, 2020
Latest recorded changeMar 7, 2024

The lot

What is already here?

The lot holds a 3-story one-family home built in 1899, on a 1,740 sq ft lot.

  1. Floors 2–3Nothing on record
  2. Floor 1Street levelStreet level. The lot is recorded as one and two family homes.
  • Street levelOne and two family homes
  • Above the southern skylineFrom about floor 5 — the tallest thing within 60 m to the south is 13.9 m
Drawn from the outline and roof height the Department of City Planning publishes for this building: 12.3 m over 3 floors, as the city counts them. 1 run of floors has something on record. The city publishes a roof height and a storey count for the lot, and nothing at all about any individual floor. What stands to the south is measured from the city’s own footprints and roof heights; it is a statement about the skyline, not a calculation of sunlight.
Built
1899
Floors
3
Residential units
1
Building type
One-family home
Land use
One and two family homes
Zoning district
R6B
Lot area
1,740 sq ft
Building area
3,112 sq ft

Owner of record

2023 O'CONNELL QSS TRUST

As the assessment roll records it. Only owners that read as a company are shown here; where the roll names an individual, nothing is published.

Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 14, 2026. They describe the tax lot, not any single filing. When the rest of New York went up

Violation record

Are there open violations here?

No open violations are recorded for this building.

Open means the agency has not recorded a resolution, which is not the same as the problem still existing. What a violation is, and what it is not. From NYC Department of Buildings, DOB Violations (3h2n-5cm9), accessed Sep 14, 2026.

What is recorded here

Multiple filings, one stable building identifier.

New York City's Building Identification Number helps connect filings that may use different application numbers or describe different scopes of work. The records below are grouped because they publish BIN 3007091. They should not be read as a single construction project unless the underlying filings say so.

The matched set includes 10 alteration filing. Its latest status categories are 6 recorded as completed, 4 approved. Each filing page preserves its own status, dates, scope and source identifier.

First included filing
Jul 15, 2020
Latest recorded change
Mar 7, 2024
Highest proposed story count
4 stories
Highest proposed unit count
2 dwelling units

Highest recorded values may come from different filings and must not be combined into one proposed project. Open the individual filings below for their exact scope. Values outside the publication's conservative data-quality bounds are withheld pending source review.

Address alerts

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Recorded history

What has happened at this address?

Every dated event the city has published for this building, from all 10 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.

  1. Alteration filed

    Major renovation to plumbing systems in 1-family residential building, including natural gas system, domestic water and sanitary system as per plans filed in conjunction with Alt 1 # 321590925. Filing B00362538-I1.

    01
  2. Alteration filed

    Interior renovation with all new heating and air conditioning system as per plans filed in conjunction with Alt 1 # 321590925. Filing B00362531-I1.

    02
  3. Alteration approved

    Filing B00362531-I1 reached an approved status.

    03
  4. Alteration approved

    Filing B00362538-I1 reached an approved status.

    04
  5. Alteration filed

    Propose to install new sprinkler system throughout the building as per plan filed in conjunction with Alt 1 # 321590925. Filing B00399787-I1.

    05
  6. Alteration approved

    Filing B00399787-I1 reached an approved status.

    06
  7. Permit recorded for alteration

    DOB lists a first permit date for B00362538-I1. That is not by itself confirmation of activity on site.

    07
  8. Alteration filed

    Major renovation to plumbing systems in 1-family residential building, including natural gas system, domestic water and sanitary system as per plans filed in conjunction with Alt 1 # 321590925. Filing B00362538-P1.

    08
  9. Alteration filed

    Propose to install new sprinkler system throughout the building as per plan filed in conjunction with Alt 1 # 321590925. Filing B00399787-P1.

    09
  10. Alteration approved

    Filing B00362538-P1 reached an approved status.

    010
  11. Alteration now approved

    The latest status recorded for B00362538-P1 is “Approved.”

    011
  12. Alteration approved

    Filing B00399787-P1 reached an approved status.

    012
  13. Alteration now approved

    The latest status recorded for B00399787-P1 is “Approved.”

    013
  14. Alteration filed

    Interior renovation with all new heating and air conditioning system as per plans filed in conjunction with Alt 1 # 321590925. Filing B00362531-P1.

    014
  15. Alteration approved

    Filing B00362531-P1 reached an approved status.

    015
  16. Alteration now approved

    The latest status recorded for B00362531-P1 is “Approved.”

    016
  17. Alteration filed

    Propose Structural scope of work filed in conjunction with Alt 1 # 321590925. This application is to supersede structural scope of work filed under Alt1 # 321590925, doc # 01. Filing B00483482-I1.

    017
  18. Alteration approved

    Filing B00483482-I1 reached an approved status.

    018
  19. Alteration filed

    Proposed installation of heavy duty sidewalk shed as per plans. live load 300 per square feet. sidewalk shed shall comply with chapter # 33 of the 2014 code. no change in use occupancy or egress under this application. Filing B00496466-I1.

    019
  20. Alteration filed

    Alteration type 3 - construction equipment - scaffolding installation of pipe scaffold as per plans. pipe scaffold shall comply withchapter 33 of the NYC building code. no change in use, egress or occupancy. Filing B00496467-I1.

    020
  21. Permit recorded for alteration

    DOB lists a first permit date for B00496466-I1. That is not by itself confirmation of activity on site.

    021
  22. Permit recorded for alteration

    DOB lists a first permit date for B00496467-I1. That is not by itself confirmation of activity on site.

    022
  23. Permit recorded for alteration

    DOB lists a first permit date for B00399787-I1. That is not by itself confirmation of activity on site.

    023
  24. Permit recorded for alteration

    DOB lists a first permit date for B00483482-I1. That is not by itself confirmation of activity on site.

    024
  25. Alteration signed off

    DOB recorded a sign-off for B00496466-I1.

    025
  26. Alteration now completed

    The latest status recorded for B00496466-I1 is “LOC Issued.”

    026
  27. Alteration signed off

    DOB recorded a sign-off for B00496467-I1.

    027
  28. Alteration now completed

    The latest status recorded for B00496467-I1 is “LOC Issued.”

    028
  29. Permit recorded for alteration

    DOB lists a first permit date for B00362531-I1. That is not by itself confirmation of activity on site.

    029
  30. Alteration signed off

    DOB recorded a sign-off for B00483482-I1.

    030
  31. Alteration now completed

    The latest status recorded for B00483482-I1 is “LOC Issued.”

    031
  32. Alteration signed off

    DOB recorded a sign-off for B00362531-I1.

    032
  33. Alteration now completed

    The latest status recorded for B00362531-I1 is “LOC Issued.”

    033
  34. Alteration filed

    Major renovation to plumbing systems in 1-family residential building, including natural gas system, domestic water and sanitary system as per plans filed in conjunction with Alt 1 # 321590925. Filing B00362538-P2.

    034
  35. Alteration approved

    Filing B00362538-P2 reached an approved status.

    035
  36. Alteration now approved

    The latest status recorded for B00362538-P2 is “Approved.”

    036
  37. Alteration signed off

    DOB recorded a sign-off for B00399787-I1.

    037
  38. Alteration now completed

    The latest status recorded for B00399787-I1 is “LOC Issued.”

    038
  39. Alteration signed off

    DOB recorded a sign-off for B00362538-I1.

    039
  40. Alteration now completed

    The latest status recorded for B00362538-I1 is “LOC Issued.”

    040

Matched DOB filings

All included filings for this building.

Each card opens a distinct official-source filing. Statuses reflect the current Street Futures snapshot, accessed Oct 7, 2026; this list should not be treated as a complete title or permit search.

Keep reading

Where this building sits.

Neighborhoods

Carroll Gardens-Cobble Hill-Gowanus-Red Hook

Streets

Union Street

Postal codes

11231

Applicants of record

Plus Group Consulting Engg, PLLCSyed Engineering, P.C.Silman