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Brooklyn • Store Building

399 Knickerbocker Ave

Brooklyn, NY 11237Individually ownedBBL 3032690004BIN 3074472
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Updated Aug 1, 2026 · 16 sources

Year Built1931
Floors3
Units1
Building Area42,500 sqft
ZoningC4-3
ClassK4
Market Value$10.3M

399 KNICKERBOCKER AVE is a property located at 399 KNICKERBOCKER AVE, Brooklyn, NY 11237. It is classified as a store building - predominantly residential. The building was constructed in 1931. It has 3 floors and 1 unit. The building area is 42,500 square feet on a 12,500 sqft lot. The property is zoned C4-3. The assessed market value is $10.3M. Public records list the property as individually owned. There are 99 building permits on record (43 active). There are 26 violations on record (2 currently open). 31 docketed judgments carrying $9,500 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

305records on file

Completed in 1931, 399 Knickerbocker Ave rises 3 stories over Kings. Public records put it at 1 unit and 42,500 square feet of floor area, on land zoned C4-3. It is carried on the public rolls at a market value of $10.3M, and assessed for tax at $4.6M. In the 47 years its record reaches back, the lot has drawn 305 separate government filings.

The documentary life of the address leans hard toward permit: 99 of its 305 records, fully 32%, fall under that one heading. Inspection (68) and enforcement (57) 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 38.3 kBtu per square foot. Its operations answer for roughly 142 metric tons of CO2-equivalent a year.

Read together — 32% permit, 47 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$10.3M of Kings, written across 305 government filings.

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

Property Details

Address399 KNICKERBOCKER AVE, Brooklyn, NY 11237
Building TypeStore Building - Predominantly Residential
K4
Year Built1931
Floors3
Total Units1
Building Area42,500 sqft
Lot Size12,500 sqft
ZoningC4-3
3032690004
3074472
OwnershipIndividually owned

Assessment & Sales

$10.3M
$4.6M
$366K

Building Permits

99 on record · 43 active
General ConstructionDOB NOW
APPROVED
Filed Jan 30, 2026Job #B01348057-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed Jan 20, 2026Est. cost $140KJob #B01291637-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed Jan 6, 2026Est. cost $1KJob #B01305518-I1
View this permit's full record & inspection history →
General ConstructionDOB NOW
LOC ISSUED
Filed Jan 6, 2026Est. cost $400Job #B01305519-I1
View this permit's full record & inspection history →
ElectricalDOB NOW
COMPLETE
Filed Nov 5, 2025Job #B01314088-I1-EL

FILING ILLUMINATION FOR ILLUMINATED CHANNEL LETTERS ON BACKER PANEL READING ""(LOGO) PUREGYM"" - JOB NUMBER B01305518 - SIGN CONNECTION AND DISCONNECT SWITCH ONLY - BRANCH CIRCUIT INSTALLED BY OTHERS - FILING REPRESENTATIVE SIGNSTAR

View this permit's full record & inspection history →

+ 94 more permits — view full report

Violations

26 on record · 2 open
Open judgment balance — docketed OATH judgments$9,500
Judgments · 31 docketed
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jun 22, 2026Balance $450Ticket #049563967P
DIRTY SIDEWALK COMM MAN INDUSTRIAL MIXED USE 1ST
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jun 12, 2026Balance $450Ticket #049558124K
DIRTY SIDEWALK COMM MAN INDUSTRIAL MIXED USE 1ST
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jun 30, 2026Balance $300Ticket #049558035Z
LOOSE RUBBISH 1ST OCCURRENCE
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jun 30, 2026Balance $450Ticket #049558021H
DIRTY SIDEWALK COMM MAN INDUSTRIAL MIXED USE 1ST
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Apr 30, 2026Balance $1,000Ticket #011826954Z
ROOFTOP ACCESS AND MEANS OF EGRESS

+ 26 more docketed judgments — view full report

ECBConstruction
ACTIVE
Issued Jul 22, 2026#39197186M

FAILURE TO FILE A CERTIFICATE OF CORRECTION WITH DEPT OF BUILDINGS FOR VIO# 39169318R., FILE A CERTIFICATE OF CORRECTION

View this violation's full details & status history →
ECBConstruction
ACTIVE
Issued Dec 4, 2025#39169318R

VIOLATION FOR FAILURE TO PROVIDE UNOBSTRUCTED PASSAGEWAY. AT TIME OF INSPECTION OBSERVED AT 1ST FLOOR AT REAR OF 5 BELOW STORE EMERGENCY EGGRESS BLOCKED AND HALLWAY LEADING TO EGGRESS. OBSERVED WOODEN PALATTES,

View this violation's full details & status history →

+ 24 more violations on record — view full report

Get the Complete Report for 399 KNICKERBOCKER 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 399 KNICKERBOCKER AVE, Brooklyn built?

The building at 399 KNICKERBOCKER AVE, Brooklyn, NY 11237 was constructed in 1931. It is classified as a store building - predominantly residential with 3 floors and 1 unit. The building area is 42,500 sqft.

Are there building permits at 399 KNICKERBOCKER AVE, Brooklyn?

Yes. 399 KNICKERBOCKER AVE, Brooklyn, NY 11237 has 99 building permits on record, with 43 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 Jan 30, 2026.

Does 399 KNICKERBOCKER AVE, Brooklyn have violations?

Yes. 399 KNICKERBOCKER AVE, Brooklyn, NY 11237 has 26 violations on record, with 2 currently open. Breakdown: 18 DOB, 8 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 399 KNICKERBOCKER AVE, Brooklyn have docketed judgments?

Yes. 399 KNICKERBOCKER AVE, Brooklyn, NY 11237 has 31 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $9,500. 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 399 KNICKERBOCKER AVE?

399 KNICKERBOCKER AVE, Brooklyn, NY 11237 has an assessed market value of $10.3M and a total assessed value of $4.6M (land: $366K). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 399 KNICKERBOCKER AVE?

399 KNICKERBOCKER AVE, Brooklyn, NY 11237 is zoned C4-3. 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 399 KNICKERBOCKER AVE?

399 KNICKERBOCKER AVE, Brooklyn, NY 11237 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 399 KNICKERBOCKER AVE?

Search 399 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 adds the complete title history, owner contacts, and a downloadable PDF.

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399 KNICKERBOCKER AVE, Brooklyn, NY 11237 — Property Records, Permits, Violations, Tax & Zoning | RegWatch