Alteration filingSep 1
DOB filing B01438371-P1
Alteration filing at 851 Willoughby Avenue
Approved3 proposed stories
Open filing Building record · BIN 3042991
851 Willoughby Avenue
851 Willoughby Avenue, Brooklyn, NY 11221
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 2 independently sourced records, including 2 that are not recorded as completed, closed or withdrawn.
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings2
Open or active-status records2
First included filingJul 31, 2026
Latest recorded changeSep 1, 2026
The lot
What is already here?
The lot holds a 3-story two-family home built in 1910, on a 1,206 sq ft lot.
- Built
- 1910
- Floors
- 3
- Residential units
- 2
- Building type
- Two-family home
- Land use
- One and two family homes
- Zoning district
- C4-4L
- Lot area
- 1,206 sq ft
- Building area
- 1,917 sq ft
Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 4, 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 4, 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 3042991. They should not be read as a single construction project unless the underlying filings say so.
The matched set includes 2 alteration filing. Its latest status categories are 2 approved. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Jul 31, 2026
- Latest recorded change
- Sep 1, 2026
- Highest proposed story count
- 3 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.
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Recorded history
What has happened at this address?
Every dated event the city has published for this building, from all 2 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.
- Alteration filed01
Proposing to repair the rear-yard fire escape to correct the conditions cited in vacate order complaint 3A37714. No change in use, egress, or occupancy is proposed. Filing B01438371-I1.
- Alteration filed02
Proposing to repair the rear-yard fire escape to correct the conditions cited in vacate order complaint 3A37714. No change in use, egress, or occupancy is proposed. Filing B01438371-P1.
- Alteration approved03
Filing B01438371-I1 reached an approved status.
- Alteration approved04
Filing B01438371-P1 reached an approved status.
- Alteration now approved05
The latest status recorded for B01438371-P1 is “Approved.”
- Alteration now approved06
The latest status recorded for B01438371-I1 is “Approved.”