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Brooklyn • Hospital

2840 Knapp St

Brooklyn, NY 11235Company-ownedBBL 3088080045BIN 3247955
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Updated Aug 1, 2026 · 16 sources

Year Built1969
Floors6
Units1
Building Area66,242 sqft
ZoningR6
ClassI6
Market Value$9.2M

2840 KNAPP ST is a property located at 2840 KNAPP ST, Brooklyn, NY 11235. It is classified as a hospital - adult care. The building was constructed in 1969. It has 6 floors and 1 unit. The building area is 66,242 square feet on a 29,500 sqft lot. The property is zoned R6. The assessed market value is $9.2M. Public records list the property as company-owned. There are 108 building permits on record (64 active). There are 67 violations on record (2 currently open). 6 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

345records on file

Completed in 1969, 2840 Knapp St rises 6 stories over Kings. Public records put it at 1 unit and 66,242 square feet of floor area, on land zoned R6. It is carried on the public rolls at a market value of $9.2M, and assessed for tax at $4.1M. In the 60 years its record reaches back, the lot has drawn 345 separate government filings.

The documentary life of the address leans hard toward permit: 108 of its 345 records, fully 31%, fall under that one heading. Violation (67) and inspection (55) 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 2017.

On the environmental ledger, the building is benchmarked under Local Law 84, with a site energy-use intensity of 153.4 kBtu per square foot. Its operations answer for roughly 762 metric tons of CO2-equivalent a year.

Read together — 31% permit, 60 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$9.2M of Kings, written across 345 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

Address2840 KNAPP ST, Brooklyn, NY 11235
Building TypeHospital - Adult Care
I6
Year Built1969
Floors6
Total Units1
Building Area66,242 sqft
Lot Size29,500 sqft
ZoningR6
3088080045
3247955
OwnershipCompany-owned

Assessment & Sales

$9.2M
$4.1M
$60K

Building Permits

108 on record · 64 active
General ConstructionDOB NOW
LOC ISSUED
Filed Feb 27, 2026Est. cost $9KJob #B01199371-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed Feb 11, 2026Est. cost $175KJob #B01328090-I1
View this permit's full record & inspection history →
PlumbingDOB NOW
SIGNED-OFF
Filed Feb 3, 2026Est. cost $42KJob #B01328090-S1

Initial Permit

View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Feb 3, 2026Est. cost $42KJob #B01328090-S1
View this permit's full record & inspection history →
General ConstructionDOB NOW
SIGNED-OFF
Filed Jan 22, 2026Est. cost $175KJob #B01328090-I1

Initial Permit

View this permit's full record & inspection history →

+ 103 more permits — view full report

Violations

67 on record · 2 open
Judgments · 6 docketed
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Sep 30, 2022Ticket #039054906N
FAILURE TO MAINTAIN ELEVATOR OR CONVEYING SYSTEM
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Jan 31, 2022Ticket #012106559J
FIRE PROTECTION SYSTEMS:FAIL TO PREVENT UNNECESSARY UNWARRANTED ALARMS
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Sep 30, 2017Ticket #038252772H
FAILURE TO MAINTAIN ELEVATOR OR CONVEYING SYSTEM
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Nov 30, 2017Ticket #038252773J
FAILURE TO MAINTAIN ELEVATOR OR CONVEYING SYSTEM
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jan 31, 2017Ticket #035136093Z
WORK WITHOUT A PERMIT

+ 1 more docketed judgment — view full report

DOB LegacyAEUHAZ1
ACTIVE
Issued Oct 4, 2023#2740878

FAILURE TO CERTIFY CORRECTION ON IMMEDIATELY HAZARDOUS (CLASS 1) ECB VIOLATION

View this violation's full details & status history →

+ 66 more violations on record — view full report

Get the Complete Report for 2840 KNAPP 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 2840 KNAPP ST, Brooklyn built?

The building at 2840 KNAPP ST, Brooklyn, NY 11235 was constructed in 1969. It is classified as a hospital - adult care with 6 floors and 1 unit. The building area is 66,242 sqft.

Are there building permits at 2840 KNAPP ST, Brooklyn?

Yes. 2840 KNAPP ST, Brooklyn, NY 11235 has 108 building permits on record, with 64 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a General Construction (LOC ISSUED) filed Feb 27, 2026.

Does 2840 KNAPP ST, Brooklyn have violations?

Yes. 2840 KNAPP ST, Brooklyn, NY 11235 has 67 violations on record, with 2 currently open. Breakdown: 40 DOB, 27 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 2840 KNAPP ST, Brooklyn have docketed judgments?

Yes. 2840 KNAPP ST, Brooklyn, NY 11235 has 6 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 2840 KNAPP ST?

2840 KNAPP ST, Brooklyn, NY 11235 has an assessed market value of $9.2M and a total assessed value of $4.1M (land: $60K). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 2840 KNAPP ST?

2840 KNAPP ST, Brooklyn, NY 11235 is zoned R6. 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 2840 KNAPP ST?

2840 KNAPP ST, Brooklyn, NY 11235 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 2840 KNAPP ST?

Search 2840 KNAPP 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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2840 KNAPP ST, Brooklyn, NY 11235 — Property Records, Permits, Violations, Tax & Zoning | RegWatch