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Brooklyn • Primarily Residential

665 Knickerbocker Ave

Brooklyn, NY 11221Individually ownedBBL 3033780009BIN 3077323
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16 sources

Year Built1910
Floors3
Units3
Building Area3,600 sqft
ZoningR6
ClassS2
Market Value$1.2M

665 KNICKERBOCKER AVE is a property located at 665 KNICKERBOCKER AVE, Brooklyn, NY 11221. It is classified as a primarily residential - mixed use with 5-6 units. The building was constructed in 1910. It has 3 floors and 3 units. The building area is 3,600 square feet on a 1,900 sqft lot. The property is zoned R6. The assessed market value is $1.2M. Public records list the property as individually owned. There are 5 building permits on record (5 active). There are 37 violations on record (36 currently open). 12 docketed judgments carrying $13,250 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

150records on file

Completed in 1910, 665 Knickerbocker Ave rises 3 stories over Kings. Public records put it at 3 units and 3,600 square feet of floor area, on land zoned R6. It is carried on the public rolls at a market value of $1.2M, and assessed for tax at $73.3K. In the 60 years its record reaches back, the lot has drawn 150 separate government filings.

The documentary life of the address leans hard toward inspection: 56 of its 150 records, fully 37%, fall under that one heading. Violation (37) and enforcement (22) trail well behind. 36 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 2025.

Read together — 37% inspection, 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.

$1.2M of Kings, written across 150 government filings.

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Executive summary, compliance history, title chain & existing debt, recorded documents & agreements, owner contacts, tax detail, Use & Development, build envelope, market comps, investment metrics, deal math & stress tests, deal signals, pre-foreclosure signals, neighborhood. Downloadable PDF. One payment, no subscription.

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

Address665 KNICKERBOCKER AVE, Brooklyn, NY 11221
Building TypePrimarily Residential - Mixed Use with 5-6 Units
S2
Year Built1910
Floors3
Total Units3
Building Area3,600 sqft
Lot Size1,900 sqft
ZoningR6
ConditionAverage
3033780009
3077323
OwnershipIndividually owned

Assessment & Sales

$1.2M
$73K
$12K

Building Permits

5 on record · 5 active
General ConstructionDOB NOW
APPROVED
Filed Mar 31, 2026Job #B01334794-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
APPROVED
Filed Feb 19, 2026Job #B01336526-I1
View this permit's full record & inspection history →
ElectricalDOB NOW
PERMIT ISSUED
Filed Nov 20, 2025Job #B01322658-I1-EL

GENERAL WIRING/3RD FLOOR APARTMENT.NO OTHER WORK.(VIOLATION#039167495Z)

View this permit's full record & inspection history →
Mechanical SystemsDOB NOW
PERMIT ISSUED
Filed Apr 21, 2021Est. cost $7KJob #B00453360-I1

Initial Permit

View this permit's full record & inspection history →
General ConstructionDOB NOW
PERMIT ENTIRE
Filed Apr 21, 2021Est. cost $7KJob #B00453360-I1
View this permit's full record & inspection history →

Violations

37 on record · 36 open
Open judgment balance — docketed OATH judgments$13,250
Judgments · 12 docketed
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2026Ticket #039167495Z
ELECTRICAL WORK WITHOUT A PERMIT
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2026Ticket #039167496K
PLUMBING WORK W O PERMIT IN MANUFACTURING DISTRICT FOR RESIDENTIAL USE
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2026Ticket #039167497M
WORK WITHOUT A PERMIT
NYPD summons (OATH)JUDGMENT DOCKETED
Docketed Dec 30, 2025Balance $25Ticket #0220192455
OPEN CONTAINER CONSUMPTION OF ALCOHOL ON STREETS
NYPD summons (OATH)JUDGMENT DOCKETED
Docketed Dec 30, 2025Balance $25Ticket #0220405864
OPEN CONTAINER CONSUMPTION OF ALCOHOL ON STREETS

+ 7 more docketed judgments — view full report

ECBConstruction
ACTIVE
Issued Aug 4, 2026#39198974H

FAILURE TO COMPLY WITH THE COMMISSIONER'S ORDERS TO FILE A CERTIFICATE OF CORRECTION FOR VIO# 39167495Z, FILE A CERTIFICATE OF CORRECTION

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ECBConstruction
ACTIVE
Issued Aug 4, 2026#39198975J

UNLAWFUL ACTS. FAILURE TO COMPLY WITH THE COMMISSIONER'S ORDERS TO OBTAIN A PERMIT FOR VIO# 39167496K. NO PERMIT ON FILE FOR INSTALLATION OF METAL GAS PIPE AND PVC PIPES IN KITCHEN AREA WALL, COMPLY WITH COMMIS

View this violation's full details & status history →
ECB
ACTIVE
Issued Nov 18, 2025#39167495Z

ATOI, I OBSERVED NEW BREAKER BOX WITH NO COVER, ALONG WITH NEW BX-CABLE WIRES RUNNING THROUGHOUT THE 3RD FLOOR APARTMENTS TO NEW LIGHTING FIXTURES AND NEW ELECTRICAL BOXES., OBTAIN PERMIT

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ECBConstruction
ACTIVE
Issued Nov 18, 2025#39167497M

ATOI, I OBSERVED NEW FRAMING WORK IN PROGRESS AT THE ENTIRE 3RD FLOOR, NEW 2X4 FRAMING ALONG WITH NEW SHEETROCK FRAMING. BATHROOM WAS FULLY GUTTED OUT., OBTAIN ALL PERMITS

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ECBPlumbing
ACTIVE
Issued Nov 18, 2025#39167496K

ATOI, I OBSERVED ON THE 3RD FLOOR A GAS LINE NOT CAP, WITH NEW 1-INCH METAL GAS PIPE INSTALLED TO GAS LINE INSIDE THE FLOOR OF KITCHEN. INSIDE THE BATHROOM AN UNKNOWN MALE ADDING NEW PVC PIPES, WITH NEW PVC PIP

View this violation's full details & status history →

+ 32 more violations on record — view full report

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

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Frequently Asked Questions

When was 665 KNICKERBOCKER AVE, Brooklyn built?

The building at 665 KNICKERBOCKER AVE, Brooklyn, NY 11221 was constructed in 1910. It is classified as a primarily residential - mixed use with 5-6 units with 3 floors and 3 units. The building area is 3,600 sqft.

Are there building permits at 665 KNICKERBOCKER AVE, Brooklyn?

Yes. 665 KNICKERBOCKER AVE, Brooklyn, NY 11221 has 5 building permits on record, with 5 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 (APPROVED) filed Mar 31, 2026.

Does 665 KNICKERBOCKER AVE, Brooklyn have violations?

Yes. 665 KNICKERBOCKER AVE, Brooklyn, NY 11221 has 37 violations on record, with 36 currently open. Breakdown: 31 DOB, 6 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 665 KNICKERBOCKER AVE, Brooklyn have docketed judgments?

Yes. 665 KNICKERBOCKER AVE, Brooklyn, NY 11221 has 12 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $13,250. 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 665 KNICKERBOCKER AVE?

665 KNICKERBOCKER AVE, Brooklyn, NY 11221 has an assessed market value of $1.2M and a total assessed value of $73K (land: $12K). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 665 KNICKERBOCKER AVE?

665 KNICKERBOCKER AVE, Brooklyn, NY 11221 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 665 KNICKERBOCKER AVE?

665 KNICKERBOCKER AVE, Brooklyn, NY 11221 is individually 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 665 KNICKERBOCKER AVE?

Search 665 KNICKERBOCKER 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 ($15, one-time) adds the complete title history, owner contacts, and a downloadable PDF.

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665 KNICKERBOCKER AVE, Brooklyn, NY 11221 — Property Records, Permits, Violations, Tax & Zoning | RegWatch