Brooklyn • Warehouse

21 Gardner Ave

Brooklyn, NY 11237Company-ownedBBL 3030010016BIN 3070656

Updated Aug 1, 2026 · 16 sources

Year Built1931
Floors2
Units1
Building Area26,750 sqft
ZoningM1-2
ClassE1
Market Value$1.4M

21 GARDNER AVE is a property located at 21 GARDNER AVE, Brooklyn, NY 11237. It is classified as a warehouse - fireproof. The building was constructed in 1931. It has 2 floors and 1 unit. The building area is 26,750 square feet on a 26,000 sqft lot. The property is zoned M1-2. The assessed market value is $1.4M. Public records list the property as company-owned. There are 47 building permits on record (36 active). There are 116 violations on record (111 currently open). 14 docketed judgments carrying $3,000 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

436records on file
100Energy Star

Completed in 1931, 21 Gardner Ave rises 2 stories over Kings. Public records put it at 1 unit and 26,750 square feet of floor area, on land zoned M1-2. It is carried on the public rolls at a market value of $1.4M, and assessed for tax at $648K. In the 59 years its record reaches back, the lot has drawn 436 separate government filings.

The documentary life of the address leans hard toward inspection: 163 of its 436 records, fully 37%, fall under that one heading. Violation (116) and permit (47) trail well behind. 111 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 posts an Energy Star score of 100, with a site energy-use intensity of 106.1 kBtu per square foot. Its operations answer for roughly 155 metric tons of CO2-equivalent a year.

Read together — 37% inspection, 59 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$1.4M of Kings, written across 436 government filings.

Property Details

Address21 GARDNER AVE, Brooklyn, NY 11237
Building TypeWarehouse - Fireproof
E1
Year Built1931
Floors2
Total Units1
Building Area26,750 sqft
Lot Size26,000 sqft
ZoningM1-2
3030010016
3070656
OwnershipCompany-owned

Assessment & Sales

$1.4M
$648K
$410K

Building Permits

47 on record · 36 active
General ConstructionDOB NOW
LOC ISSUED
Filed Dec 5, 2024Est. cost $150KJob #B01019022-I1
General ConstructionDOB NOW
APPROVED
Filed Dec 3, 2024Est. cost $150KJob #B01019022-P3
General ConstructionDOB NOW
APPROVED
Filed Oct 16, 2024Est. cost $150KJob #B01019022-P2
General ConstructionDOB NOW
LOC ISSUED
Filed Sep 25, 2024Est. cost $24KJob #B01019022-S1
General ConstructionDOB NOW
APPROVED
Filed Sep 23, 2024Est. cost $150KJob #B01019022-P1

+ 42 more permitsview full report

Violations

116 on record · 111 open
Open judgment balance — docketed OATH judgments$3,000
Judgments · 14 docketed
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Nov 30, 2025Balance $3,000Ticket #014193257P
SIGN, POSTINGS, NOTICES AND INSTRUCTIONS
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Apr 30, 2020Ticket #0209766031
DIRTY SIDEWALK DIRTY AREA
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Feb 29, 2020Ticket #0208869000
FAILURE TO CLEAN 18 INCHES INTO STREET
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Oct 31, 2019Ticket #011680659R
FIRE PROTECTION SYSTEMS
Sanitation summons (OATH)JUDGMENT DOCKETED
Docketed Jan 31, 2019Ticket #042189483R
DIRTY AREA

+ 9 more docketed judgmentsview full report

DOB LegacyHBLVIO
ACTIVE
Issued Nov 14, 2025#2796039

VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL HGH PRESSURE INSPECTION

View this violation's full details & status history →
DOB LegacyHBLVIO
ACTIVE
Issued Nov 14, 2025#2796034

VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL HGH PRESSURE INSPECTION

View this violation's full details & status history →
DOB LegacyHBLVIO
ACTIVE
Issued Nov 14, 2025#2796036

VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL HGH PRESSURE INSPECTION

View this violation's full details & status history →
DOB LegacyLBLVIO
ACTIVE
Issued Nov 14, 2025#2806750

VIOLATION ISSUED-FAILURE TO FILE 2024 EXTERNAL LOW PRESSURE INSPECTION

View this violation's full details & status history →
DOB LegacyHBLVIO
ACTIVE
Issued Nov 14, 2025#2796848

VIOLATION ISSUED-FAILURE TO FILE 2024 INTERNAL HGH PRESSURE INSPECTION

View this violation's full details & status history →

+ 111 more violations on record — view full report

Get the Complete Report for 21 GARDNER 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 21 GARDNER AVE, Brooklyn built?

The building at 21 GARDNER AVE, Brooklyn, NY 11237 was constructed in 1931. It is classified as a warehouse - fireproof with 2 floors and 1 unit. The building area is 26,750 sqft.

Are there building permits at 21 GARDNER AVE, Brooklyn?

Yes. 21 GARDNER AVE, Brooklyn, NY 11237 has 47 building permits on record, with 36 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 Dec 5, 2024.

Does 21 GARDNER AVE, Brooklyn have violations?

Yes. 21 GARDNER AVE, Brooklyn, NY 11237 has 116 violations on record, with 111 currently open. Breakdown: 114 DOB, 2 ECB. Sources: NYC DOB, HPD, and ECB/OATH.

Does 21 GARDNER AVE, Brooklyn have docketed judgments?

Yes. 21 GARDNER AVE, Brooklyn, NY 11237 has 14 docketed judgments on record with the NYC Office of Administrative Trials & Hearings (OATH), with an open balance of $3,000. 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 21 GARDNER AVE?

21 GARDNER AVE, Brooklyn, NY 11237 has an assessed market value of $1.4M and a total assessed value of $648K (land: $410K). Assessment data is from the NYC Department of Finance (DOF).

What is the zoning for 21 GARDNER AVE?

21 GARDNER AVE, Brooklyn, NY 11237 is zoned M1-2. 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 21 GARDNER AVE?

21 GARDNER AVE, Brooklyn, NY 11237 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 21 GARDNER AVE?

Search 21 GARDNER 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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21 GARDNER AVE, Brooklyn, NY 11237 — Property Records, Permits, Violations, Tax & Zoning | RegWatch