Alteration filingSep 30
DOB filing M01293829-I1
Alteration filing at 509 West 121 Street
ApprovedDOB filing M01293829-I1
Open filing Building record · BIN 1059655
509 West 121 Street
509 West 121 Street, Manhattan, NY 10027
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 The current snapshot links 2 independently sourced records, including 2 that are not recorded as completed, closed or withdrawn.
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BUILDING RECORD · BIN 1059655
509 West 121 Street
Morningside Heights, Manhattan
A consolidated public-record view · updated Sep 30, 2026
- DOB filings
- 2
- Active-status
- 2
- Recorded addresses
- 1
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings2
Open or active-status records2
First included filingAug 22, 2024
Latest recorded changeSep 30, 2026
The lot
What is already here?
The lot holds a 8-story elevator apartment building built in 1911, with 110 homes, on a 14,525 sq ft lot.
- Floors 2–8Homes110 homes are recorded on this lot — about 16 homes to a floor. The city does not publish which floor any of them is on.
- Floor 1Street levelStreet level. The lot is recorded as elevator apartments.
- Street levelElevator apartments
- Homes110 recorded on the lot
- Above the southern skylineFrom about floor 15 — the tallest thing within 60 m to the south is 44.1 m
- Built
- 1911
- Last altered
- 1989
- Floors
- 8
- Residential units
- 110
- Building type
- Elevator apartment building
- Land use
- Elevator apartments
- Zoning district
- R8
- Lot area
- 14,525 sq ft
- Building area
- 81,632 sq ft
Housing violations
5 violations are open against this address under the Housing Maintenance Code. 5 of them are the class the city calls immediately hazardous.
- 5Immediately hazardous
- 0Hazardous
- 0Non-hazardous
- 0Information order
Open means the Department of Housing Preservation and Development has not recorded it as corrected, which is not the same as nobody having fixed it. The city publishes the apartment each was written against; that is not carried here, because a count says a building has a problem and an apartment number says whose.
Owner of record
TRUSTEES OF COLUMBIA UNIVERSITY
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 Oct 2, 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?
The Department of Buildings has 15 open notices on record for this building, out of 53 notices on file; the most recent was issued Feb 22, 2022.
- Failure to correct swarmp conditions (facade)
Issued Feb 22, 2022 — CYCLE 9A FAILURE TO CORRECT SWARMP CONDITIONS
- Hazardous condition (facade)
Issued Feb 22, 2022 — CYCLE 9A UNSAFE REPORT FILED
- Failure to post energy
Issued Apr 29, 2021 — FAILURE TO DISPLAY ENERGY EFFICIENCY SCORE AND ENERGY EFFICIENCY GRADE AS PER ADCODE SEC. 28-309.12.3
12 further open notices are on file. Open the source dataset for the full list.
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 Oct 2, 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 1059655. 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
- Aug 22, 2024
- Latest recorded change
- Sep 30, 2026
- Highest proposed story count
- 8 stories
- Highest proposed unit count
- 20 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
Application filed herewith for facade restoration work as shown on plans submitted. no change in use, egress or occupancy under this application. Filing M01094107-I1.
- Alteration approved02
Filing M01094107-I1 reached an approved status.
- Alteration filed03
Installation of suspended scaffold for facade work and/or inspection. Amend #2, added scaffold drops. Filing M01293829-I1.
- Alteration approved04
Filing M01293829-I1 reached an approved status.
- Permit recorded for alteration05
DOB lists a first permit date for M01293829-I1. That is not by itself confirmation of activity on site.
- Permit recorded for alteration06
DOB lists a first permit date for M01094107-I1. That is not by itself confirmation of activity on site.
- Alteration now approved07
The latest status recorded for M01094107-I1 is “Permit Entire.”
- Alteration now approved08
The latest status recorded for M01293829-I1 is “Permit Entire.”