NYC DOB record · M01423179-S1

517 West 121 Street

517 West 121 Street, Manhattan, NY 10027

Alteration filing in Morningside Heights, Manhattan. The latest DOB status is permit entire.

DOB has issued the permit covering the full scope of this filing, so the work is cleared to proceed.

ApprovedAlteration filing

NYC Department of Buildings · w9ak-ipjd · accessed Sep 4, 2026 · Verify the source row

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NYC DOB RECORD · M01423179-S1

517 West 121 Street

Manhattan, NY 10027

Alteration filing · status dated Sep 1, 2026

Current record
Approved
Proposed scale
18 stories
Dwelling units
241
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 M01423179-S1 as a alteration filing at 517 West 121 Street, Manhattan, NY 10027. Its latest published status category is Approved, dated Sep 1, 2026. The filing records 18 proposed stories and 241 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
Sep 1, 2026
Proposed scale
18 proposed stories and 241 proposed dwelling units
Applicant of recordSee the 49 filings that name Kma Designs LLC
FiledSep 1, 2026
Current recordApproved
Proposed scale18 stories
Recorded cost$9,000

What the filing says

A public-record reading of the proposed work.

Installation of heavy duty sidewalk shed. no change in use, occupancy or egress. all work to comply with chapter 33 of nycbc

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 19-story elevator apartment building built in 2004, with 241 homes, on a 12,000 sq ft lot.

Built
2004
Floors
19
Residential units
241
Building type
Elevator apartment building
Land use
Elevator apartments
Zoning district
R8
Lot area
12,000 sq ft
Building area
112,000 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 this filing.

Recorded timeline

Dates published by the Department of Buildings.

  1. Application filed

    DOB received filing M01423179-S1.

    01
  2. First permit date recorded

    DOB lists a first permit date. This does not by itself confirm current construction activity.

    02
  3. Current status updated

    The latest recorded filing status is “Permit Entire.”

    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
M01423179-S1
BIN
1059654
BBL
1019760019
Review type
Professional Certification
Existing stories
18
Proposed stories
18
Existing dwelling units
241
Proposed dwelling units
241