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Building record · BIN 3021513

451 6 Street

451 6 Street, Brooklyn, NY 11215

A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 11 independently sourced records, including 6 that are not recorded as completed, closed or withdrawn.

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BUILDING RECORD · BIN 3021513

451 6 Street

Park Slope, Brooklyn

A consolidated public-record view · updated Nov 5, 2025

DOB filings
11
Active-status
6
Recorded addresses
1
Building data portrait

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

Matched filings11
Open or active-status records6
First included filingAug 5, 2019
Latest recorded changeNov 5, 2025

The lot

What is already here?

The lot holds a 3-story walk-up apartment building built in 1899, with 3 homes, on a 2,000 sq ft lot.

  1. Floors 2–3Homes3 homes are recorded on this lot — about one home to a floor, and the apartments assessed on this block run to a typical 1,047 sq ft (97 m²). The city does not publish which floor any of them is on.
  2. Floor 1Street levelStreet level. The lot is recorded as walk-up apartments.
  • Street levelWalk-up apartments
  • Homes3 recorded · typically 97 m² · valued $856,968
  • Above the southern skylineFrom about floor 6 — the tallest thing within 60 m to the south is 17.8 m
Drawn from the outline and roof height the Department of City Planning publishes for this building: 13.4 m over 3 floors, as the city counts them. 2 runs of floors have 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
3
Building type
Walk-up apartment building
Land use
Walk-up apartments
Zoning district
R6B
Lot area
2,000 sq ft
Building area
3,600 sq ft

The apartments

24 condominium apartments are assessed on this block, and the typical one is 1,047 sq ft (97 m²). They run from 91 to 192 m².

The city values the typical one at $856,968. That is the Department of Finance’s market valuation for tax, not an asking price and not a sale.

Owner of record

ZHONGGULOU LLC

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 21, 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. 4 notices are on file, all with a recorded resolution.

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 3021513. They should not be read as a single construction project unless the underlying filings say so.

The matched set includes 11 alteration filing. Its latest status categories are 5 recorded as completed, 6 approved. Each filing page preserves its own status, dates, scope and source identifier.

First included filing
Aug 5, 2019
Latest recorded change
Nov 5, 2025
Highest proposed story count
4 stories
Highest proposed unit count
3 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 11 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.

  1. Alteration filed

    Subsequent Sprinkler Application for Sprinkler Work Type in conjunction with BIS job # 321964781. Filing B00203110-I1.

    01
  2. Alteration filed

    PROPOSED NEW REAR 2-STORY HORIZONTAL EXTENSION WITH NEW NONCOMBUSTIBLE ROOF in conjunction with Job # 321964781. Replacing wood joists at rear 2nd & 3rd floors. And add mechanical units on the roof. Filing B00202585-I1.

    02
  3. Alteration approved

    Filing B00203110-I1 reached an approved status.

    03
  4. Alteration approved

    Filing B00202585-I1 reached an approved status.

    04
  5. Alteration filed

    Temporary Construction Fence in rear yard. Filing B00202585-S1.

    05
  6. Alteration approved

    Filing B00202585-S1 reached an approved status.

    06
  7. Alteration filed

    PROPOSED NEW REAR 2-STORY HORIZONTAL EXTENSION WITH NEW NONCOMBUSTIBLE ROOF in conjunction with Job # 321964781. Replacing wood joists at rear 2nd & 3rd floors. Filing B00202585-P1.

    07
  8. Alteration approved

    Filing B00202585-P1 reached an approved status.

    08
  9. Permit recorded for alteration

    DOB lists a first permit date for B00202585-I1. That is not by itself confirmation of activity on site.

    09
  10. Permit recorded for alteration

    DOB lists a first permit date for B00203110-I1. That is not by itself confirmation of activity on site.

    010
  11. Alteration filed

    Temporary Construction Fence in rear yard. Filing B00383139-I1.

    011
  12. Alteration approved

    Filing B00383139-I1 reached an approved status.

    012
  13. Permit recorded for alteration

    DOB lists a first permit date for B00383139-I1. That is not by itself confirmation of activity on site.

    013
  14. Alteration now approved

    The latest status recorded for B00202585-P1 is “Approved.”

    014
  15. Alteration filed

    PROPOSED NEW REAR 2-STORY HORIZONTAL EXTENSION WITH NEW NONCOMBUSTIBLE ROOF in conjunction with Job # 321964781. Replacing wood joists at rear 2nd & 3rd floors. And add mechanical units on the roof. Filing B00202585-P2.

    015
  16. Alteration filed

    Subsequent Domestic Plumbing work in conjunction with BIS job # 321964781. Filing B00203110-S1.

    016
  17. Alteration filed

    Subsequent Sprinkler Application for Sprinkler Work Type in conjunction with BIS job # 321964781. Filing B00203110-P1.

    017
  18. Alteration filed

    Mechanical work in conjunction with BIS job # 321964781. Filing B00203110-S2.

    018
  19. Alteration approved

    Filing B00203110-P1 reached an approved status.

    019
  20. Alteration now approved

    The latest status recorded for B00203110-P1 is “Approved.”

    020
  21. Alteration approved

    Filing B00203110-S2 reached an approved status.

    021
  22. Alteration approved

    Filing B00202585-P2 reached an approved status.

    022
  23. Alteration now approved

    The latest status recorded for B00202585-P2 is “Approved.”

    023
  24. Alteration approved

    Filing B00203110-S1 reached an approved status.

    024
  25. Alteration now approved

    The latest status recorded for B00203110-S1 is “Approved.”

    025
  26. Alteration filed

    Subsequent Sprinkler Application for Sprinkler Work Type in conjunction with BIS job # 321964781. Filing B00203110-P2.

    026
  27. Alteration approved

    Filing B00203110-P2 reached an approved status.

    027
  28. Alteration now approved

    The latest status recorded for B00203110-P2 is “Approved.”

    028
  29. Permit recorded for alteration

    DOB lists a first permit date for B00203110-S2. That is not by itself confirmation of activity on site.

    029
  30. Alteration signed off

    DOB recorded a sign-off for B00383139-I1.

    030
  31. Alteration now completed

    The latest status recorded for B00383139-I1 is “LOC Issued.”

    031
  32. Permit recorded for alteration

    DOB lists a first permit date for B00202585-S1. That is not by itself confirmation of activity on site.

    032
  33. Alteration signed off

    DOB recorded a sign-off for B00202585-S1.

    033
  34. Alteration now completed

    The latest status recorded for B00202585-S1 is “LOC Issued.”

    034
  35. Alteration signed off

    DOB recorded a sign-off for B00203110-S2.

    035
  36. Alteration now completed

    The latest status recorded for B00203110-S2 is “LOC Issued.”

    036
  37. Alteration filed

    PROPOSED NEW REAR 2-STORY HORIZONTAL EXTENSION WITH NEW NONCOMBUSTIBLE ROOF in conjunction with Job # 321964781. Replacing wood joists at rear 2nd & 3rd floors. And add mechanical units on the roof. Filing B00202585-P3.

    037
  38. Alteration approved

    Filing B00202585-P3 reached an approved status.

    038
  39. Alteration now approved

    The latest status recorded for B00202585-P3 is “Approved.”

    039
  40. Alteration signed off

    DOB recorded a sign-off for B00203110-I1.

    040
  41. Alteration now completed

    The latest status recorded for B00203110-I1 is “LOC Issued.”

    041
  42. Alteration signed off

    DOB recorded a sign-off for B00202585-I1.

    042
  43. Alteration now completed

    The latest status recorded for B00202585-I1 is “LOC Issued.”

    043

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 2, 2026; this list should not be treated as a complete title or permit search.

Keep reading

Where this building sits.

Neighborhoods

Park Slope

Streets

6 Street

Postal codes

11215

Applicants of record

Anz Consulting Engineering, PLLCKnf Services CorpBenjamin Ellis Architect