NYC DOB record · B01408705-I1

421 Hart Street

421 Hart Street, Brooklyn, NY 11221

Alteration filing in Bedford-Stuyvesant (East), Brooklyn. The latest DOB status is approved.

A plan examiner has approved the application. A permit still has to be issued before work can begin.

ApprovedAlteration filing

NYC Department of Buildings · w9ak-ipjd · accessed Aug 29, 2026 · Verify the source row

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421 Hart Street record graphic showing the DOB filing status and stated proposal scale
Filing data portrait

A page-specific reading of the filing status, location and stated scale. Values are drawn from the cited DOB record.

Address record at a glance

What is filed at this address?

NYC DOB lists filing B01408705-I1 as a alteration filing at 421 Hart Street, Brooklyn, NY 11221. Its latest published status category is Approved, dated Aug 26, 2026. The filing records 9 proposed dwelling units.

A filing or approval does not by itself confirm that work is underway. Proposed details may change in later DOB records.
Filing type
Alteration filing
Latest status
Approved
Latest status date
Aug 26, 2026
Proposed scale
9 proposed dwelling units
FiledJun 23, 2026
Current recordApproved
Proposed scale9 units
Recorded cost$10,000

What the filing says

A public-record reading of the proposed work.

Support of Excavation in conjunction with the ALT-I application in BIS 321253558-06.

Street Futures classifies this record as a alteration filing based on the filing type and work flags published by the Department of Buildings. This classification helps organize the map; it does not add scope that is absent from the DOB record.

The lot this filing sits on

What is already here?

The lot holds a 2-story two-family home built in 1899, on a 2,000 sq ft lot.

Built
1899
Last altered
2015
Floors
2
Residential units
2
Building type
Two-family home
Land use
One and two family homes
Zoning district
C4-4L
Lot area
2,000 sq ft
Building area
2,160 sq ft

Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 1, 2026. They describe the tax lot, not this filing.

Recorded timeline

Dates published by the Department of Buildings.

  1. Application filed

    DOB received filing B01408705-I1.

    01
  2. Application approved

    The application reached an approved status in the DOB record.

    02
  3. Current status updated

    The latest recorded filing status is “Approved.”

    03

Scope and identifiers

The details used to match this filing.

Where a field reads “empty in the source”, the city published this filing without that value. It is not an omission on our side, and nothing here is inferred to fill a gap.

DOB filing number
B01408705-I1
BIN
3043058
BBL
3015930048
Review type
Standard Plan Examination
Existing stories
Empty in the source
Proposed stories
Empty in the source
Existing dwelling units
4
Proposed dwelling units
9