Alteration filingSep 4
DOB filing B00458348-P2
Alteration filing at 421 Blake Avenue
Approved3 proposed stories
Open filing Building record · BIN 3328027
421 Blake Avenue
421 Blake Avenue, Brooklyn, NY 11212
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 6 independently sourced records, including 3 that are not recorded as completed, closed or withdrawn.
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings6
Open or active-status records3
First included filingApr 29, 2021
Latest recorded changeSep 4, 2026
The lot
What is already here?
The lot holds a 14-story elevator apartment building built in 1953, with 628 homes, on a 337,075 sq ft lot.
- Built
- 1953
- Floors
- 14
- Residential units
- 628
- Building type
- Elevator apartment building
- Land use
- Elevator apartments
- Zoning district
- R6
- Lot area
- 337,075 sq ft
- Building area
- 497,397 sq ft
Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 5, 2026. They describe the tax lot, not any single filing.
Violation record
Are there open violations here?
No open violations are recorded for this building.
A violation is a notice the Department of Buildings recorded against the building. It is not a judgment, and many concern paperwork rather than safety. Open means the agency has not recorded a resolution, which is not the same as the problem still existing. From NYC Department of Buildings, DOB Violations (3h2n-5cm9), accessed Sep 5, 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 3328027. They should not be read as a single construction project unless the underlying filings say so.
The matched set includes 6 alteration filing. Its latest status categories are 3 approved, 3 recorded as completed. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Apr 29, 2021
- Latest recorded change
- Sep 4, 2026
- Highest proposed story count
- 3 stories
- Highest proposed unit count
- 18 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.
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Recorded history
What has happened at this address?
Every dated event the city has published for this building, from all 6 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.
- Alteration filed01
Mechanical work for central boiler plant and domestic hot water system replacement (van dyke bldg #6) as per the plans filed herewith. Filing B00462689-I1.
- Alteration filed02
Plumbing work as per plans filed herewith. no change to use, egress or occupancy. Filing B00463305-I1.
- Alteration approved03
Filing B00463305-I1 reached an approved status.
- Alteration filed04
General construction in cellar as per plans filed herewith. no change in use, egress, or occupancy. Filing B00455254-I1.
- Alteration approved05
Filing B00455254-I1 reached an approved status.
- Alteration filed06
Nycha boiler-structural related work in the cellar for central boiler plant and domestic hotwater system replacement. Filing B00458348-I1.
- Alteration approved07
Filing B00458348-I1 reached an approved status.
- Alteration approved08
Filing B00462689-I1 reached an approved status.
- Permit recorded for alteration09
DOB lists a first permit date for B00462689-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration010
DOB lists a first permit date for B00455254-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration011
DOB lists a first permit date for B00463305-I1. That is not by itself confirmation of activity on site.
- Alteration filed012
Plumbing work as per plans filed herewith. no change to use, egress or occupancy. Filing B00463305-P3.
- Alteration approved013
Filing B00463305-P3 reached an approved status.
- Alteration now approved014
The latest status recorded for B00463305-P3 is “Approved.”
- Alteration signed off015
DOB recorded a sign-off for B00463305-I1.
- Alteration now completed016
The latest status recorded for B00463305-I1 is “LOC Issued.”
- Alteration filed017
Nycha boiler-structural related work in the cellar for central boiler plant and domestic hotwater system replacement. Filing B00458348-P2.
- Alteration signed off018
DOB recorded a sign-off for B00455254-I1.
- Alteration now completed019
The latest status recorded for B00455254-I1 is “LOC Issued.”
- Alteration signed off020
DOB recorded a sign-off for B00462689-I1.
- Alteration now completed021
The latest status recorded for B00462689-I1 is “LOC Issued.”
- Alteration approved022
Filing B00458348-P2 reached an approved status.
- Alteration now approved023
The latest status recorded for B00458348-P2 is “Approved.”
- Alteration now approved024
The latest status recorded for B00458348-I1 is “Approved.”