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

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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 105 building permits on record (47 active). There are 34 violations on record (2 currently open). 36 docketed judgments carrying $11,600 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

325records 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 48 years its record reaches back, the lot has drawn 325 separate government filings.

The documentary life of the address leans hard toward permit: 105 of its 325 records, fully 32%, fall under that one heading. Inspection (64) and enforcement (62) 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 2023.

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, 48 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 325 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 DOB NYC HPD NYC DOF ACRIS NYC DCP ECB/OATH NYC DEP NYC LPC NYC FDNY NYS DHCR MOCEJ FEMA EPA US Census HUD USGS

latest record Oct 20, 2026

Property Details

Address399 KNICKERBOCKER AVE, Brooklyn, NY 11237

Building TypeStore Building - Predominantly Residential

Building ClassK4

Year Built1931

Floors3

Total Units1

Building Area42,500 sqft

Lot Size12,500 sqft

ZoningC4-3

BBL3032690004

BIN3074472

OwnershipIndividually owned

Assessment & Sales

Market Value$10.3M

Assessed Total$4.6M

Assessed Land$366K

Building Permits

105 on record · 47 active

ElectricalDOB NOW

PERMIT ISSUED

Filed Oct 20, 2026Job #B01476321-I1-EL

REPLACE RECEPTACLES, LIGHT FIXTURES AND RELOCATE CIRCUITS TO NEW LOCATION

View this permit's full record & inspection history →

General ConstructionDOB NOW

PERMIT ISSUED

Filed Oct 1, 2026Est. cost $435KJob #B01444237-I1

Initial Permit

View this permit's full record & inspection history →

General ConstructionDOB NOW

PERMIT ENTIRE

Filed Oct 1, 2026Est. cost $435KJob #B01444237-I1

View this permit's full record & inspection history →

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 →

+ 100 more permits — view full report

Violations

34 on record · 2 open

Open judgment balance — docketed OATH judgments$11,600

Judgments · 36 docketed

Sanitation summons (OATH)JUDGMENT DOCKETED

Docketed Sep 11, 2026Balance $450Ticket #049725806N

DIRTY SIDEWALK COMM MAN INDUSTRIAL MIXED USE 1ST

Sanitation summons (OATH)JUDGMENT DOCKETED

Docketed Sep 8, 2026Balance $450Ticket #049226937R

DIRTY SIDEWALK COMM MAN INDUSTRIAL MIXED USE 1ST

Sanitation summons (OATH)JUDGMENT DOCKETED

Docketed Sep 8, 2026Balance $450Ticket #049651186M

DIRTY SIDEWALK COMM MAN INDUSTRIAL MIXED USE 1ST

Sanitation summons (OATH)JUDGMENT DOCKETED

Docketed Sep 30, 2026Balance $300Ticket #049651140R

IMPROPER RECEPTACLE NON-RESIDENTIAL 1ST

Sanitation summons (OATH)JUDGMENT DOCKETED

Docketed Sep 30, 2026Balance $450Ticket #049651088Z

DIRTY SIDEWALK COMM MAN INDUSTRIAL MIXED USE 1ST

+ 31 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 →

SafetyElevator

ACTIVE

Issued Oct 23, 2023#VIO-FTC-VT-CAT1-202112-0001556

Violation Issued-Failure To File 2021 Cat1 Test Affirmation of Correction

View this violation's full details & status history →

+ 32 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 105 building permits on record, with 47 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Electrical (PERMIT ISSUED) filed Oct 20, 2026.

Does 399 KNICKERBOCKER AVE, Brooklyn have violations?

Yes. 399 KNICKERBOCKER AVE, Brooklyn, NY 11237 has 34 violations on record, with 2 currently open. Breakdown: 8 DOB Safety, 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 36 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $11,600. 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 ($15, one-time) 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