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Brooklyn

12421 Flatlands Ave

Brooklyn, NY 11208Company-ownedBBL 3044231431BIN 3348507
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Updated Aug 1, 2026 · 16 sources

Floors9
ClassR4
Market Value$37K

12421 FLATLANDS AVE is a property located at 12421 FLATLANDS AVE, Brooklyn, NY 11208. The building has 9 floors. The assessed market value is $37K. It last sold for $317K on Dec 22, 2025. Public records list the property as company-owned. There are 23 building permits on record (13 active). There are 156 violations on record (19 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

1,244records on file

The lot at 12421 Flatlands Ave rises 9 stories over Kings. It is carried on the public rolls at a market value of $36.6K, and assessed for tax at $16.5K. In the 63 years its record reaches back, the lot has drawn 1,244 separate government filings — a paper trail nearly as tall as the building itself.

The documentary life of the address leans hard toward complaint: 573 of its 1,244 records, fully 46%, fall under that one heading. Violation (156) and release (141) trail well behind. 19 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 2005.

On the environmental ledger, the building is benchmarked under Local Law 84, with a site energy-use intensity of 5642400.0 kBtu per square foot. Its operations answer for roughly 300 metric tons of CO2-equivalent a year.

Read together — 46% complaint, 63 years of accumulation, a parcel of Kings — these scattered records compose a portrait of the address that no single page sets out to draw.

$36.6K of Kings, written across 1,244 government filings.

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

Property Details

Address12421 FLATLANDS AVE, Brooklyn, NY 11208
R4
Year BuiltN/A
Floors9
Total UnitsN/A
Building AreaN/A
Lot SizeN/A
3044231431
3348507
OwnershipCompany-owned

Assessment & Sales

$37K
$16K
$5K
$317K
Last Sale DateDec 22, 2025

Building Permits

23 on record · 13 active
Cats Certificate To OperateOther
CURRENT
Filed Jul 25, 2023Job #393960
View this permit's full record & inspection history →
Asbestos AbatementDEP
CLOSED
Filed Oct 12, 2021Job #TRU1560BK21
View this permit's full record & inspection history →
Alteration — Type 3DOB Legacy
SIGNED OFF
Filed Dec 29, 2020Job #340481348-01
View this permit's full record & inspection history →
Alteration — Type 2DOB Legacy
SIGNED OFF
Filed Jul 30, 2018Est. cost $305KJob #321391668-01

FACADE

View this permit's full record & inspection history →
Construction EquipmentDOB Legacy
ISSUED
Filed May 8, 2017Job #321391668-01-01

OT

View this permit's full record & inspection history →

+ 18 more permits — view full report

Violations

156 on record · 19 open
Judgments · 6 docketed
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Apr 30, 2023Ticket #039069764Z
FAIL MAINTAIN BLDG IN COMPLIANT MANNER: SERVICE EQUIPMENT - BOILER
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Oct 31, 2009Ticket #034634515P
MISCELLANEOUS CONSTRUCTION VIOLATION - MISCELLANEOUS
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jul 21, 2008Ticket #038182771P
FAILURE TO MAINTAIN ELEVATOR
FDNY summons (OATH)JUDGMENT DOCKETED
Docketed Dec 9, 2008Ticket #010981410Y
FAILED TO OBTAIN CERTIFICATE OF FITNESS
DOB summons (OATH)JUDGMENT DOCKETED
Docketed Jul 31, 2003Ticket #032040746L
FAILURE TO MAINTAIN BOILER A .

+ 1 more docketed judgment — view full report

HPDClass C
NOT COMPLIED WITH
Issued Jan 19, 2026#18580166

§ 27-2005, 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE HINGES AT DOOR IN THE ENTRANCE LOCATED AT APT 8H, 8th STORY, 1st APARTMENT FROM WEST AT NORTH

View this violation's full details & status history →
HPDClass C
NOT COMPLIED WITH
Issued Mar 22, 2024#16761904

§ 27-2033 ADM CODE PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM ..DOOR LOCKED AT PUBLIC HALL, 1st STORY

View this violation's full details & status history →

+ 154 more violations on record — view full report

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Frequently Asked Questions

Are there building permits at 12421 FLATLANDS AVE, Brooklyn?

Yes. 12421 FLATLANDS AVE, Brooklyn, NY 11208 has 23 building permits on record, with 13 currently active. Permits are sourced from the NYC Department of Buildings (DOB Legacy and DOB NOW systems). The most recent permit is a Cats Certificate To Operate (CURRENT) filed Jul 25, 2023.

Does 12421 FLATLANDS AVE, Brooklyn have violations?

Yes. 12421 FLATLANDS AVE, Brooklyn, NY 11208 has 156 violations on record, with 19 currently open. Breakdown: 25 DOB, 30 ECB, 101 HPD. Sources: NYC DOB, HPD, and ECB/OATH.

Does 12421 FLATLANDS AVE, Brooklyn have docketed judgments?

Yes. 12421 FLATLANDS AVE, Brooklyn, NY 11208 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 12421 FLATLANDS AVE?

12421 FLATLANDS AVE, Brooklyn, NY 11208 has an assessed market value of $37K and a total assessed value of $16K (land: $5K). Assessment data is from the NYC Department of Finance (DOF).

When was 12421 FLATLANDS AVE last sold?

12421 FLATLANDS AVE, Brooklyn, NY 11208 last sold for $317K on Dec 22, 2025. Sale records are sourced from NYC ACRIS and Department of Finance rolling sales data.

Who owns 12421 FLATLANDS AVE?

12421 FLATLANDS AVE, Brooklyn, NY 11208 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 12421 FLATLANDS AVE?

Search 12421 FLATLANDS 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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12421 FLATLANDS AVE, Brooklyn, NY 11208 — Property Records, Permits, Violations, Tax & Zoning | RegWatch