NYC DOB record · M00400576-I1

439 West 21 Street

439 West 21 Street, Manhattan, NY 10011

Alteration filing in Chelsea-Hudson Yards, Manhattan. The latest DOB status is on hold - pending supersede of applicant of record.

The filing is paused until an administrative step is completed. It has not been rejected. What every status means

Under reviewAlteration filing

NYC Department of Buildings · w9ak-ipjd · accessed Sep 23, 2026 · Verify the source row

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NYC DOB RECORD · M00400576-I1

439 West 21 Street

Manhattan, NY 10011

Alteration filing · status dated Sep 22, 2026

Current record
Under review
Proposed scale
Not stated
Dwelling units
6
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 M00400576-I1 as a alteration filing at 439 West 21 Street, Manhattan, NY 10011. Its latest published status category is Under review, dated Sep 22, 2026. The filing records 6 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
Under review
Latest status date
Sep 22, 2026
Proposed scale
6 proposed dwelling units
Applicant of recordSee the 2 filings that name Hyke Engineering & Manage
FiledOct 20, 2020
Current recordUnder review
Proposed scale6 units
Recorded cost$14,000

What the filing says

A public-record reading of the proposed work.

Removal & Replacement of Plumbing Fixtures to Units #1A & #1B. As per plans filed herewith. No change to use, occupancy or egress.

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 4-story walk-up apartment building built in 1853, with 8 homes, on a 1,577 sq ft lot.

Built
1853
Last altered
2009
Floors
4
Residential units
8
Building type
Walk-up apartment building
Land use
Walk-up apartments
Zoning district
R7B
Lot area
1,577 sq ft
Building area
3,600 sq ft
Historic district
Chelsea Historic District

Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 23, 2026. They describe the tax lot, not this filing.

Violation record

Are there open violations here?

The Department of Buildings has 1 open notice on record for this building, out of 14 notices on file; the most recent was issued Oct 26, 2009.

  • Boiler

    Issued Oct 26, 2009

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 Sep 23, 2026.

Recorded timeline

Dates published by the Department of Buildings.

  1. Application filed

    DOB received filing M00400576-I1.

    01
  2. Application approved

    The application reached an approved status in the DOB record.

    02
  3. First permit date recorded

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

    03
  4. Current status updated

    The latest recorded filing status is “On Hold - Pending Supersede of Applicant of Record.”

    04

For scale: half of DOB filings are permitted within 21 days of being filed and a quarter take longer than 4 months, measured across 67,630 filings that carry both dates. How long a permit takes, by work type and borough

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
M00400576-I1
BIN
1012625
BBL
1007190019
Review type
Standard Plan Examination
Existing stories
Empty in the source
Proposed stories
Empty in the source
Existing dwelling units
6
Proposed dwelling units
6