340 21 Street

Brooklyn, NY

BBL 3-00898-0032BIN 3017569

Concern level3 of 4

High

0111 active DOB violation(s)
0213 open HPD violation(s)

How this is set: open hazardous violations measured against the building's size, then raised by strong distress signals — HPD's enforcement program, court harassment findings, recent evictions, unpaid DOB fines, open housing-court cases, and a sold tax lien. Neighborhood noise and crime are not part of it. It describes the public record, not the condition of any one apartment, and a quiet record is not proof of a good building.

Rent regulation

Likely rent-stabilized

The owner registered 8 stabilized units with New York State for 2023 — essentially all of the building's 8 apartments.

2018 — 8 units registered2023 — 8

No public data says which specific apartment is stabilized.

Registration counts apply to the building, not to unit numbers. To confirm your own apartment, request your rent history from New York State Homes and Community Renewal — it is free and takes a few weeks.

How to request your rent history →

Rent regulation

The building

1931

Built

Floors

Residential units

Walk-up apartments

Type

The building

This building and the landlord's others

This building2 others linked to the same owner

HPD housing-maintenance violations

Open now

On record

Open Class C

Open Class B

Open Class A

Class C is immediately hazardous, Class B is hazardous, Class A is non-hazardous. A violation stays open until HPD certifies the repair, so some open items may already be fixed.

CLASS I · NON-HAZARDOUS

§27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE SUBJECT TO CIVIL PENALTIES, PROHIBITED FROM CERTIFYING VIOLATIONS, AND DENIED THE RIGHT TO RECOVER POSSESSION OF PREMISES FOR NONPAYMENT OF RENT UNTIL A VALID REGISTRATION STATEMENT IS FILED.

Status: Notice issued, not yet certified

CLASS B · HAZARDOUSApt 8Issued 2025-03-11

§ 27-2045 ADM CODE REPAIR OR REPLACE THE SMOKE DETECTOR DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT 8, 4th STORY

Status: Certified late

CLASS B · HAZARDOUSIssued 2025-03-11

§ 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE STUCCO AT SOUTH WALL OF THE BUILDING , 1st STORY

Status: Certified late

CLASS B · HAZARDOUSApt 3Issued 2025-03-11

§ 27-2046.1, 2046.2 HMC: PROVIDE AN APPROVED AND OPERATIONAL CARBON MONOXIDE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH APPLICABLE LAW AND RULES. IN THE ENTIRE APARTMENT LOCATED AT APT 3, 2nd STORY

Status: Certified late

HPD housing-maintenance violations

311 complaints from tenants

All time

Last 12 months

Unsanitary Condition1

Unsanitary ConditionPests2021-02-15 · closed

Complaints record what a tenant reported, not a finding by the city. "Closed" often means the inspector could not gain access.

311 complaints from tenants

Neighborhood noise

Lower than averagevs. NYC apartment blocks

227

Noise reports · last 12 mo

≈ per month

% from neighbors

Unspecified76

Residential65

Commercial38

Vehicle29

Street/Sidewalk16

Helicopter2

Park1

311 noise complaints within about 1,000 ft (a few blocks) in the last year. Most reports here are about outdoor noise (mostly unspecified) — street life and traffic more than neighbors. This counts how often people call 311, which tracks how densely populated and busy an area is as much as how loud it is — it is not a sound measurement.

Neighborhood noise

Neighborhood crime

Much lower than averagevs. NYC apartment blocks

NYPD reports · last 12 mo

≈ per month

Felony12

Misdemeanor12

Violation4

NYPD complaints reported within about 1,000 ft (a few blocks) in the last year, by severity. This reflects what gets reported and where police are active as much as actual safety, and busier, denser, higher-foot-traffic blocks log more. Locations are approximate — the NYPD shifts each report to the nearest corner for privacy — so read this as rough context, not a safety score.

Neighborhood crime

Bedbug history

No bedbugs reported

The owner filed 1 annual bedbug report and reported no infested units. Filing with zero infestations is the compliant, reassuring case.

Bedbug history

DOB building violations

Active

On record

Active, last 3 yrs

ACTIVE · LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED2023-06-20

VIOLATION ISSUED-FAILURE TO FILE 2018 EXTERNAL LOW PRESSURE INSPECTION

ACTIVE · LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED2019-11-08

VIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2017 INSPECTION REPORT

ACTIVE · LBLVIO-LOW PRESSURE BOILER BOILER REQUIRED2015-10-01

VIOLATION ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2014 INSPECTION REPORT

DOB building violations

Evictions

No executed evictions on record for this building.

Evictions

Housing court

Cases on record

Open now

Tenant-brought

Harassment found

With a judgment

Most cases are tenants taking the owner to court to force repairs. A case is not proof of wrongdoing; a harassment finding or judgment is a court ruling against the owner.

CLOSEDOpened 2012-10-25

Failure to Register Only

CLOSEDOpened 2008-02-06

Comprehensive

CLOSEDOpened 2007-10-02

Access Warrant - Non-Lead

Housing court

Landlord and related buildings

Registered owner

340 REALTY LLC

Head officer

MEIR KOHN

Managing agent

340 REALTY

2 other buildings share this owner's registration contacts. Shared contacts suggest common control, but they are not proof of ownership.

1154 MYRTLE AVENUEBROOKLYN 517 3 AVENUEBROOKLYN

Landlord and related buildings

Unpaid city fines

Balance due (active)

Active violations

Lost by default

DOB violations adjudicated by OATH carry money penalties. "Lost by default" means the owner never appeared at the hearing. An unpaid balance is a stronger "ignoring the city" signal than a raw violation count.

Unpaid city fines

Ownership & money

Recorded sales

Mortgages / refinances

Last recorded sale1996-12-02 · no recorded price

Most recent mortgage1999-08-25 · $200,000

Mortgage1999-08-25$200,000

borrower 340 REALTY L L C · lender GREENPOINT MORTGAGECORP

Mortgage1997-02-05$200,000

borrower 340 REALTY LLC · lender OLYNIK, THERESA

Sale1996-12-02no recorded price

OLYNIK, THERESA → 340 REALTY LLC

Sale1993-04-13no recorded price

SWEETHOUSE ENTERPRISES I → OLYNIK, THERESA

Mortgage1982-01-25$25,000

borrower SWEETHOUSE ENT, INC. · lender NIEDBALSKI, RAYMOND, PENNY, JENNY NIEDBALSKI

From ACRIS recorded documents. Amounts are often $0 or nominal for transfers between related parties, and LLCs can obscure who is really involved — treat this as public-record context, not a valuation.

Ownership & money

City debt & tax-lien sale

Not on the city's tax-lien sale list (2019–2025). The owner has not fallen far enough behind on property tax or water charges to be flagged for a lien sale.

City debt & tax-lien sale