Manhattan

100 U N Plaza

Manhattan, NY Company-ownedBBL 1013417503BIN 1039205

Updated Sep 16, 2026 · 16 sources

Year Built1984
Floors49
Building Area357,793 sqft
ZoningC1-9
ClassRG
Market Value$4.1M

100 U N PLAZA is a property located at 100 U N PLAZA, Manhattan, NY . The building was constructed in 1984. The building has 49 floors. The building area is 357,793 square feet on a 25,179 sqft lot. The property is zoned C1-9. The assessed market value is $4.1M. It last sold for $723K on Aug 3, 2026. Public records list the property as company-owned. There are 453 building permits on record (325 active). There are 122 violations on record (28 currently open). 9 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

4,405records on file

Completed in 1984, 100 U N Plaza rises 49 stories over New York. Public records put it at 357,793 square feet of floor area, on land zoned C1-9. It is carried on the public rolls at a market value of $4.1M, and assessed for tax at $1.8M. In the 41 years its record reaches back, the lot has drawn 4,405 separate government filings — a paper trail nearly as tall as the building itself.

The documentary life of the address leans hard toward mortgage: 978 of its 4,405 records, fully 22%, fall under that one heading. Release (917) and sale (874) trail well behind. 28 violations stand open against it today.

The pace is anything but even. Activity is spread across the decades, with 1987 the busiest year on file.

Read together — 22% mortgage, 41 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.

$4.1M of New York, written across 4,405 government filings.

Property Details

Address100 U N PLAZA, Manhattan, NY
RG
Year Built1984
Floors49
Total UnitsN/A
Building Area357,793 sqft
Lot Size25,179 sqft
ZoningC1-9
1013417503
1039205
OwnershipCompany-owned

Assessment & Sales

$4.1M
$1.8M
$810K
$723K
Last Sale DateAug 3, 2026

Building Permits

453 on record · 325 active
Public SafetyDOB NOW
AHV PERMIT ISSUED
Filed Sep 12, 2026Job #M8110965
Public SafetyDOB NOW
AHV PERMIT ISSUED
Filed Sep 5, 2026Job #M3730769
Asbestos AbatementDEP
SUBMITTED
Filed Aug 25, 2026Job #TRU1621MN26
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Aug 20, 2026Est. cost $3.1MJob #M00968481-I1
Public SafetyDOB NOW
ON HOLD - PENDING SUPERSEDE OF APPLICANT OF RECORD
Filed Aug 8, 2026Job #M7799250

+ 448 more permitsview full report

Violations

122 on record · 28 open
Judgments · 9 docketed
OATH summonsJUDGMENT DOCKETED
Docketed Sep 30, 2025Ticket #0219801378
FAILURE TO COMPLY WITH THE TERMS AND CONDITIONS OF DOT PERMITS
OATH summonsJUDGMENT DOCKETED
Docketed Sep 30, 2025Ticket #0219801387
OBSTRUCTION OF STREET W CONSTRUCTION MATERIALS EQUIPMENT W O PERMIT
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2023Ticket #035657789K
MISC. VIOLATION OF COND ON AS OF RIGHT PRIVATELY OWNED PUBLIC SPACE
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2022Ticket #012112941L
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Jun 30, 2020Ticket #012096526R
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS

+ 4 more docketed judgmentsview full report

SafetyElevator
ACTIVE
Issued Aug 29, 2025#VIO-FTF-VT-CAT1-202412-0001625

Violation Issued-Failure To File 2024 Cat1 Test Report

View this violation's full details & status history →
SafetyParking Structures
ACTIVE
Issued Dec 31, 2024#VIO-FTC-PS-UNSAFE-202312-0010980

Unsafe report of parking structures filed.

View this violation's full details & status history →
SafetyElevator
ACTIVE
Issued Sep 11, 2024#VIO-FTF-VT-CAT1-202312-0001237

Violation Issued-Failure To File 2023 Cat1 Test Report

View this violation's full details & status history →
HPDClass B
NOV SENT OUT
Issued Nov 30, 2023#16485562

§ 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE 2nd BATHROOM FROM EAST LOCATED AT APT 3G, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTH

View this violation's full details & status history →
HPDClass B
DEFECT LETTER ISSUED
Issued Nov 30, 2023#16485561

§ 27-2017.3 HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... AT CEILING APPROXIMATELY 11 SQ. FT. IN THE 2nd BATHROOM FROM EAST LOCATED AT APT 3G, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTH

View this violation's full details & status history →

+ 117 more violations on record — view full report

Get the Complete Report for 100 U N PLAZA

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

Free to view core records, no credit card required — the paid report adds title history & analysis.

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Frequently Asked Questions

When was 100 U N PLAZA, Manhattan built?

The building at 100 U N PLAZA, Manhattan, NY was constructed in 1984. with 49 floors. The building area is 357,793 sqft.

Are there building permits at 100 U N PLAZA, Manhattan?

Yes. 100 U N PLAZA, Manhattan, NY has 453 building permits on record, with 325 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Public Safety (AHV PERMIT ISSUED) filed Sep 12, 2026.

Does 100 U N PLAZA, Manhattan have violations?

Yes. 100 U N PLAZA, Manhattan, NY has 122 violations on record, with 28 currently open. Breakdown: 10 DOB Safety, 88 DOB, 20 ECB, 4 HPD. Sources: NYC DOB, HPD, and ECB/OATH.

Does 100 U N PLAZA, Manhattan have docketed judgments?

Yes. 100 U N PLAZA, Manhattan, NY has 9 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 100 U N PLAZA?

100 U N PLAZA, Manhattan, NY has an assessed market value of $4.1M and a total assessed value of $1.8M (land: $810K). Assessment data is from the NYC Department of Finance (DOF).

When was 100 U N PLAZA last sold?

100 U N PLAZA, Manhattan, NY last sold for $723K on Aug 3, 2026. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 100 U N PLAZA?

100 U N PLAZA, Manhattan, NY is zoned C1-9. 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 100 U N PLAZA?

100 U N PLAZA, Manhattan, NY 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 100 U N PLAZA?

Search 100 U N PLAZA 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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100 U N PLAZA, Manhattan, NY — Property Records, Permits, Violations, Tax & Zoning | RegWatch