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Manhattan

121 West End Ave

Manhattan, NY 10023Company-ownedBBL 1011710060BIN 1083025
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Updated Aug 1, 2026 · 16 sources

Year Built1989
Floors7
Building Area474,496 sqft
ZoningC4-2F
ClassRB
Market Value$77M

121 WEST END AVE is a property located at 121 WEST END AVE, Manhattan, NY 10023. The building was constructed in 1989. The building has 7 floors. The building area is 474,496 square feet on a 99,015 sqft lot. The property is zoned C4-2F. The assessed market value is $77M. It last sold for $222M on Mar 12, 2021. Public records list the property as company-owned. There are 511 building permits on record (389 active). There are 153 violations on record (0 currently open). 8 docketed judgments carrying $455 in open balances are on record with OATH. Data sourced from NYC Department of Buildings (DOB), Housing Preservation & Development (HPD), Department of Finance (DOF), and other government agencies.

A RegWatch Dossier

879records on file
97Energy Star

Completed in 1989, 121 West End Ave rises 7 stories over New York. Public records put it at 474,496 square feet of floor area, on land zoned C4-2F. It is carried on the public rolls at a market value of $77.0M, and assessed for tax at $34.7M. In the 46 years its record reaches back, the lot has drawn 879 separate government filings — a paper trail nearly as tall as the building itself.

The documentary life of the address leans hard toward permit: 511 of its 879 records, fully 58%, fall under that one heading. Violation (153) and enforcement (68) trail well behind. No violations stand open against it today.

The pace is anything but even. The early decades pass in near silence; the filings cluster heavily in recent years, peaking in 2021.

On the environmental ledger, the building posts an Energy Star score of 97, with a site energy-use intensity of 26.1 kBtu per square foot. Its operations answer for roughly 940 metric tons of CO2-equivalent a year.

Read together — 58% permit, 46 years of accumulation, a parcel of New York — these scattered records compose a portrait of the address that no single page sets out to draw.

$77.0M of New York, written across 879 government filings.

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Sources
NYC DOBNYC HPDNYC DOFACRISNYC DCPECB/OATHNYC DEPNYC LPCNYC FDNYNYS DHCRMOCEJFEMAEPAUS CensusHUDUSGS
updated

Property Details

Address121 WEST END AVE, Manhattan, NY 10023
RB
Year Built1989
Floors7
Total UnitsN/A
Building Area474,496 sqft
Lot Size99,015 sqft
ZoningC4-2F
1011710060
1083025
OwnershipCompany-owned

Assessment & Sales

$77M
$34.7M
$8.9M
$222M
Last Sale DateMar 12, 2021

Building Permits

511 on record · 389 active
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Jun 24, 2026Est. cost $8KJob #103021310-01
View this permit's full record & inspection history →
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Mar 6, 2026Est. cost $4KJob #102893004-01
View this permit's full record & inspection history →
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Jan 22, 2026Est. cost $1MJob #121618231-01

STRUCTURAL

View this permit's full record & inspection history →
AlterationDOB Legacy
ISSUED
Filed Jan 9, 2025Job #123725184-01-05
View this permit's full record & inspection history →
Cats RegistrationOther
CURRENT
Filed Sep 20, 2024Job #441260
View this permit's full record & inspection history →

+ 506 more permits — view full report

Violations

153 on record · none currently open
Open judgment balance — docketed OATH judgments$455
Judgments · 8 docketed
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Apr 30, 2020Ticket #035458128L
REMOVAL OF SHED OR PROTECTIVE MEASURE WITHOUT DEPARTMENT APPROVAL
DEP summons (OATH)JUDGMENT DOCKETED
Docketed Jun 30, 2020Balance $455Ticket #000419390P
IDLING OF MOTOR VEHICLE ENGINE MORE THAN THREE MINUTES 1ST OFF
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Mar 31, 2015Ticket #044581574L
ILLEGAL POSTING OF HANDBILL NOTICE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Mar 31, 2015Ticket #044581575N
ILLEGAL POSTING OF HANDBILL NOTICE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed May 31, 2015Ticket #044582038M
ILLEGAL POSTING OF HANDBILL NOTICE

+ 3 more docketed judgments — view full report

DOB LegacyE
RESOLVED
Issued Jul 1, 2020#2466017
View this violation's full details & status history →
DOB LegacyE
RESOLVED
Issued Jul 1, 2020#2466016
View this violation's full details & status history →
DOB LegacyE
RESOLVED
Issued Jul 1, 2020#2466018
View this violation's full details & status history →
DOB LegacyE
RESOLVED
Issued Jul 1, 2020#2466019
View this violation's full details & status history →
DOB LegacyE
RESOLVED
Issued Jul 1, 2020#2501323
View this violation's full details & status history →

+ 148 more violations on record — view full report

Get the Complete Report for 121 WEST END AVE

Title history, detailed tax records, environmental data, zoning analysis, and more from 250+ government sources.

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Frequently Asked Questions

When was 121 WEST END AVE, Manhattan built?

The building at 121 WEST END AVE, Manhattan, NY 10023 was constructed in 1989. with 7 floors. The building area is 474,496 sqft.

Are there building permits at 121 WEST END AVE, Manhattan?

Yes. 121 WEST END AVE, Manhattan, NY 10023 has 511 building permits on record, with 389 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Alteration — Type 2 (SIGNED OFF) filed Jun 24, 2026.

Does 121 WEST END AVE, Manhattan have violations?

Yes. 121 WEST END AVE, Manhattan, NY 10023 has 153 violations on record, with 0 currently open. Breakdown: 134 DOB, 19 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 121 WEST END AVE, Manhattan have docketed judgments?

Yes. 121 WEST END AVE, Manhattan, NY 10023 has 8 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $455. A docketed judgment is an enforceable money judgment entered by OATH after a hearing on a summons issued at this property; where the respondent is the property owner it can attach to the property as a lien.

What is the property tax assessment for 121 WEST END AVE?

121 WEST END AVE, Manhattan, NY 10023 has an assessed market value of $77M and a total assessed value of $34.7M (land: $8.9M). Assessment data is from the NYC Department of Finance (DOF).

When was 121 WEST END AVE last sold?

121 WEST END AVE, Manhattan, NY 10023 last sold for $222M on Mar 12, 2021. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 121 WEST END AVE?

121 WEST END AVE, Manhattan, NY 10023 is zoned C4-2F. Zoning data is from the NYC Department of City Planning (DCP). For detailed FAR, overlays, and development rights, view the full property report on RegWatch.

Who owns 121 WEST END AVE?

121 WEST END AVE, Manhattan, NY 10023 is company-owned according to public records. Ownership data is from NYC Department of Finance assessment rolls. View the current owner of record and registered contacts in the full property report on RegWatch.

How do I get a full property report for 121 WEST END AVE?

Search 121 WEST END AVE on RegWatch to see its public record free — violations, permits, tax records, zoning, environmental data, and more from 250+ government sources, no credit card required. A Full Analysis report adds the complete title history, owner contacts, and a downloadable PDF.

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121 WEST END AVE, Manhattan, NY 10023 — Property Records, Permits, Violations, Tax & Zoning | RegWatch