Alteration filingSep 10
509 West 121 Street
Morningside Heights, Manhattan
Approved8 proposed stories
View record Street record · Manhattan
West 121 Street
3 mapped DOB filings publish this street name in the current snapshot. They span Morningside Heights, Harlem (South). 2 changed status in the last 7 days.
Qualified records3
Active-status records2
Latest status changeSep 10, 2026
What is on this street
The built record of West 121 Street
City Planning maps 151 tax lots on West 121 Street in Manhattan, 63% of them walk-up apartments. The oldest went up in 1886 and the newest in 2016. This describes the street as it stands, not the filings below.
- Tax lots
- 151
- Buildings
- 152
- Homes
- 1,320
- Typically built
- 1900s
- Typical height
- 3–19 floors
- Built area
- 1,289,559 sq ft
How the lots are used
- Walk-up apartments95 of 151
- One and two family homes38 of 151
- Elevator apartments8 of 151
Zoning: R7-2, R7A, R7B are the districts covering most of the street. A zoning district sets what may be built, not what is there now.
NYC Department of City Planning · Primary Land Use Tax Lot Output (PLUTO) · 64uk-42ks · read 2026-09-11
How to read this street page
A shared street name does not mean a shared project.
These records are grouped by the street name and borough published by DOB. Each address remains an independent filing unless its source record explicitly connects it to another site. Use this page to scan activity along the corridor, then open an individual filing for its exact status, scope and identifiers.
Explore this corridor on the mapSource snapshot accessed Sep 13, 2026. Street grouping is based on the normalized street-name field.