Alteration filingAug 12
DOB filing B00621060-S1
Alteration filing at 451 Clarkson Avenue
Under review10 proposed stories
Open filing Building record · BIN 3327711
451 Clarkson Avenue
451 Clarkson Avenue, Brooklyn, NY 11203
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 7 independently sourced records, including 7 that are not recorded as completed, closed or withdrawn.
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings7
Open or active-status records7
First included filingMar 23, 2022
Latest recorded changeAug 12, 2026
The lot
What is already here?
The lot holds a 5-story health facility built in 1930, on a 891,577 sq ft lot.
- Built
- 1930
- Last altered
- 2006
- Floors
- 5
- Residential units
- 0
- Building type
- Health facility
- Land use
- Public facilities and institutions
- Zoning district
- R5
- Lot area
- 891,577 sq ft
- Building area
- 1,503,150 sq ft
Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 2, 2026. They describe the tax lot, not any single filing.
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 3327711. They should not be read as a single construction project unless the underlying filings say so.
The matched set includes 7 alteration filing. Its latest status categories are 1 under review, 6 approved. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Mar 23, 2022
- Latest recorded change
- Aug 12, 2026
- Highest proposed story count
- 10 stories
- Highest proposed unit count
- Not stated
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 7 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.
- Alteration filed01
Structural work including new steel to accommodate hospital Cath Lab renovation on partial 2nd floor in the existing hospital, and install new steel dunnage and modification to existing dunnage to support MEP equipment 1st floor roof. Filing B00621060-I1.
- Alteration filed02
Remove and install new partitions and finishes for O.R. renovation on partial 2nd as indicated on plans filed herewith only. Work involves no change to zoning, use, egerss, or occupancy. Filing B00621025-I1.
- Alteration filed03
Remove/ replace sprinklers with new heads and piping; install temporary sprinkler protection as per plans. Remove plumbing fixtures and install newon 2nd flor. install med medical gas piping cellar through 2nd floor. Filing B00621114-I1.
- Alteration approved04
Filing B00621060-I1 reached an approved status.
- Alteration approved05
Filing B00621114-I1 reached an approved status.
- Alteration approved06
Filing B00621025-I1 reached an approved status.
- Alteration filed07
Remove and install new ductwork, AHU and chiller as per plans filed herewith for the O.R. on partial 2nd floor, C Building, in the existing hospital as per plans filed herewith. Filing B00621071-I1.
- Alteration approved08
Filing B00621071-I1 reached an approved status.
- Permit recorded for alteration09
DOB lists a first permit date for B00621060-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration010
DOB lists a first permit date for B00621071-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration011
DOB lists a first permit date for B00621025-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration012
DOB lists a first permit date for B00621114-I1. That is not by itself confirmation of activity on site.
- Alteration now approved013
The latest status recorded for B00621114-I1 is “Permit Entire.”
- Alteration now approved014
The latest status recorded for B00621071-I1 is “Permit Entire.”
- Alteration filed015
Remove and install new partitions and finishes for O.R. renovation on partial 2nd as indicated on plans filed herewith only. Work involves no change to zoning, use, egerss, or occupancy. Filing B00621025-P1.
- Alteration filed016
Structural work including new steel to accommodate hospital Cath Lab renovation on partial 2nd floor in the existing hospital, and install new steel dunnage and modification to existing dunnage to support MEP equipment 1st floor roof. Filing B00621060-P2.
- Alteration now approved017
The latest status recorded for B00621025-I1 is “Permit Entire.”
- Alteration approved018
Filing B00621025-P1 reached an approved status.
- Alteration now approved019
The latest status recorded for B00621025-P1 is “Approved.”
- Alteration now approved020
The latest status recorded for B00621060-I1 is “Permit Entire.”
- Alteration approved021
Filing B00621060-P2 reached an approved status.
- Alteration now approved022
The latest status recorded for B00621060-P2 is “Approved.”
- Alteration filed023
Construct new footing to accomodate HVAC equipment on the roof. (Refer to B00621071-I1 for mechanical equipment.). Filing B00621060-S1.
- Alteration now under review024
The latest status recorded for B00621060-S1 is “Objections.”