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Manhattan • Education

51 East 91 St

Manhattan, NY 10128Company-ownedBBL 1015030024BIN 1047019
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Updated Aug 1, 2026 · 16 sources

Year Built1910
Floors5
Units1
Building Area39,279 sqft
ZoningR8B
ClassW3
Market Value$21.7M

51 EAST 91 ST is a property located at 51 EAST 91 ST, Manhattan, NY 10128. It is classified as a education - private/charter school. The building was constructed in 1910. It has 5 floors and 1 unit. The building area is 39,279 square feet on a 10,255 sqft lot. The property is zoned R8B. The assessed market value is $21.7M. It last sold for $6.3M on May 1, 2009. Public records list the property as company-owned. There are 156 building permits on record (114 active). There are 38 violations on record (3 currently open). 4 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

330records on file

Completed in 1910, 51 East 91 St rises 5 stories over New York. Public records put it at 1 unit and 39,279 square feet of floor area, on land zoned R8B. It is carried on the public rolls at a market value of $21.7M, and assessed for tax at $9.8M. In the 48 years its record reaches back, the lot has drawn 330 separate government filings.

The documentary life of the address leans hard toward permit: 156 of its 330 records, fully 47%, fall under that one heading. Inspection (59) and violation (38) trail well behind. 3 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 2012.

Read together — 47% permit, 48 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.

$21.7M of New York, written across 330 government filings.

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

Property Details

Address51 EAST 91 ST, Manhattan, NY 10128
Building TypeEducation - Private/Charter School
W3
Year Built1910
Floors5
Total Units1
Building Area39,279 sqft
Lot Size10,255 sqft
ZoningR8B
1015030024
1047019
OwnershipCompany-owned

Assessment & Sales

$21.7M
$9.8M
$2.9M
$6.3M
Last Sale DateMay 1, 2009

Building Permits

156 on record · 114 active
Cats RegistrationOther
CURRENT
Filed Aug 27, 2025Job #471240
View this permit's full record & inspection history →
Cats RegistrationOther
CURRENT
Filed Jun 3, 2024Job #428242
View this permit's full record & inspection history →
Sidewalk ShedDOB NOW
PERMIT ISSUED
Filed Jun 16, 2023Est. cost $1KJob #M00889373-I1

Initial Permit

View this permit's full record & inspection history →
Supported ScaffoldDOB NOW
PERMIT ISSUED
Filed Jun 16, 2023Est. cost $1KJob #M00889381-I1

Initial Permit

View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Jun 16, 2023Est. cost $1KJob #M00889373-I1
View this permit's full record & inspection history →

+ 151 more permits — view full report

Violations

38 on record · 3 open
Judgments · 4 docketed
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Jun 30, 2012Ticket #012003875J
GENERAL MAINTENANCE
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Apr 30, 2012Ticket #012004674H
GENERAL MAINTENANCE
OATH summonsJUDGMENT DOCKETED
Docketed Dec 31, 2010Ticket #050041295Z
FAILED TO HAVE REQUIRED INFO IN CLEAN ROOM
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Apr 30, 2004Ticket #034409302K
FAILURE TO MAINTAIN BUILDING: INTERIOR.
DOB LegacyEnergy Benchmarking
ACTIVE
Issued May 2, 2020#2479722

FAILURE TO FILE BENCHMARKING REPORT OF ENERGY USE AS PER AD. CODE SEC. 28-309.4

View this violation's full details & status history →
DOB LegacyACC1
ACTIVE
Issued Nov 14, 2016#2104149

VIO ISSUED TO ELEVATOR - FAIL TO CORRECT DEFECTS ON 2014 CAT 1 INSP/TST

View this violation's full details & status history →

+ 36 more violations on record — view full report

Get the Complete Report for 51 EAST 91 ST

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

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Frequently Asked Questions

When was 51 EAST 91 ST, Manhattan built?

The building at 51 EAST 91 ST, Manhattan, NY 10128 was constructed in 1910. It is classified as a education - private/charter school with 5 floors and 1 unit. The building area is 39,279 sqft.

Are there building permits at 51 EAST 91 ST, Manhattan?

Yes. 51 EAST 91 ST, Manhattan, NY 10128 has 156 building permits on record, with 114 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Cats Registration (CURRENT) filed Aug 27, 2025.

Does 51 EAST 91 ST, Manhattan have violations?

Yes. 51 EAST 91 ST, Manhattan, NY 10128 has 38 violations on record, with 3 currently open. Breakdown: 32 DOB, 6 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 51 EAST 91 ST, Manhattan have docketed judgments?

Yes. 51 EAST 91 ST, Manhattan, NY 10128 has 4 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 51 EAST 91 ST?

51 EAST 91 ST, Manhattan, NY 10128 has an assessed market value of $21.7M and a total assessed value of $9.8M (land: $2.9M). Assessment data is from the NYC Department of Finance (DOF).

When was 51 EAST 91 ST last sold?

51 EAST 91 ST, Manhattan, NY 10128 last sold for $6.3M on May 1, 2009. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

What is the zoning for 51 EAST 91 ST?

51 EAST 91 ST, Manhattan, NY 10128 is zoned R8B. 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 51 EAST 91 ST?

51 EAST 91 ST, Manhattan, NY 10128 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 51 EAST 91 ST?

Search 51 EAST 91 ST 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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51 EAST 91 ST, Manhattan, NY 10128 — Property Records, Permits, Violations, Tax & Zoning | RegWatch