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Manhattan • Education

421 1 Ave

Manhattan, NY 10010Company-ownedBBL 1009300034BIN 1020601
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Updated Aug 1, 2026 · 16 sources

Year Built1929
Floors11
Units3
Building Area87,515 sqft
ZoningR8
ClassW5
Market Value$20.5M

421 1 AVE is a property located at 421 1 AVE, Manhattan, NY 10010. It is classified as a education - university. The building was constructed in 1929. It has 11 floors and 3 units. The building area is 87,515 square feet on a 12,350 sqft lot. The property is zoned R8. The assessed market value is $20.5M. Public records list the property as company-owned. There are 295 building permits on record (198 active). There are 68 violations on record (2 currently open). 10 docketed judgments 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

665records on file

Completed in 1929, 421 1 Ave rises 11 stories over New York. Public records put it at 3 units and 87,515 square feet of floor area, on land zoned R8. It is carried on the public rolls at a market value of $20.5M, and assessed for tax at $9.2M. In the 38 years its record reaches back, the lot has drawn 665 separate government filings.

The documentary life of the address leans hard toward permit: 295 of its 665 records, fully 44%, fall under that one heading. Inspection (199) and enforcement (76) trail well behind. 2 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 2018.

On the environmental ledger, the building is benchmarked under Local Law 84, with a site energy-use intensity of 186.9 kBtu per square foot. Its operations answer for roughly 1,883 metric tons of CO2-equivalent a year.

Read together — 44% permit, 38 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.

$20.5M of New York, written across 665 government filings.

Open the live report — daily-updated data, AI chat & alerts
Sources
NYC DOBNYC HPDNYC DOFACRISNYC DCPECB/OATHNYC DEPNYC LPCNYC FDNYNYS DHCRMOCEJFEMAEPAUS CensusHUDUSGS
updated

Property Details

Address421 1 AVE, Manhattan, NY 10010
Building TypeEducation - University
W5
Year Built1929
Floors11
Total Units3
Building Area87,515 sqft
Lot Size12,350 sqft
ZoningR8
1009300034
1020601
OwnershipCompany-owned

Assessment & Sales

$20.5M
$9.2M
$1.7M

Building Permits

295 on record · 198 active
Mechanical SystemsDOB NOW
PERMIT ISSUED
Filed Jun 30, 2026Est. cost $10KJob #M01417356-I1

Initial Permit

View this permit's full record & inspection history →
General ConstructionDOB NOW
PROF CERT QA REVIEW
Filed Jun 22, 2026Est. cost $10KJob #M01417356-I1
View this permit's full record & inspection history →
Mechanical SystemsDOB NOW
SIGNED-OFF
Filed Mar 30, 2026Est. cost $400KJob #M01367516-I1

Initial Permit

View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Mar 30, 2026Est. cost $400KJob #M01367516-I1
View this permit's full record & inspection history →
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Apr 15, 2025Est. cost $2KJob #122947721-01
View this permit's full record & inspection history →

+ 290 more permits — view full report

Violations

68 on record · 2 open
Judgments · 10 docketed
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Dec 31, 2025Ticket #014184194M
FIRE PROTECTION SYSTEMS
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed May 31, 2025Ticket #012160070L
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
OATH summonsJUDGMENT DOCKETED
Docketed Mar 31, 2024Ticket #014090473H
FIRE
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Mar 31, 2024Ticket #012132585M
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
OATH summonsJUDGMENT DOCKETED
Docketed Jun 30, 2021Ticket #051001649R
FAIL TO SUBMIT PROJ MONITOR S REPORT W IN 21 DAYS OF PROJ COMPLETION

+ 5 more docketed judgments — view full report

DOB LegacyE
ACTIVE
Issued May 25, 2021#2527397
View this violation's full details & status history →

+ 67 more violations on record — view full report

Get the Complete Report for 421 1 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 421 1 AVE, Manhattan built?

The building at 421 1 AVE, Manhattan, NY 10010 was constructed in 1929. It is classified as a education - university with 11 floors and 3 units. The building area is 87,515 sqft.

Are there building permits at 421 1 AVE, Manhattan?

Yes. 421 1 AVE, Manhattan, NY 10010 has 295 building permits on record, with 198 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Mechanical Systems (PERMIT ISSUED) filed Jun 30, 2026.

Does 421 1 AVE, Manhattan have violations?

Yes. 421 1 AVE, Manhattan, NY 10010 has 68 violations on record, with 2 currently open. Breakdown: 58 DOB, 10 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 421 1 AVE, Manhattan have docketed judgments?

Yes. 421 1 AVE, Manhattan, NY 10010 has 10 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH). 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 421 1 AVE?

421 1 AVE, Manhattan, NY 10010 has an assessed market value of $20.5M and a total assessed value of $9.2M (land: $1.7M). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 421 1 AVE?

421 1 AVE, Manhattan, NY 10010 is zoned R8. 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 421 1 AVE?

421 1 AVE, Manhattan, NY 10010 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 421 1 AVE?

Search 421 1 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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421 1 AVE, Manhattan, NY 10010 — Property Records, Permits, Violations, Tax & Zoning | RegWatch