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3724 Flatlands Avenue

Brooklyn, NY 11234BBL 3-07699-0046Map

Owner of record: Marine Collective LLC

3724 Flatlands Avenue is a walk-up apartment building built in 1928 in Brooklyn, 11234. It has 6 residential units across 3 floors. The owner of record is Marine Collective LLC. HPD has recorded 20 housing violations here, most recently on May 4, 2026. 2 of the 20 most recent violations are still open. City tax records listed 6 rent-stabilized apartments here in 2024.

HPD violations
20
DOB violations
2
ECB violations
2
HPD complaints
20

What to know

Good
No open Class C

No open immediately-hazardous violations among recent records.

Good
Last violation May 4, 2026

Date of the most recent HPD inspection that found a problem.

Good
No unpaid ECB fines

No balance due on recent ECB violations.

Rent stabilization

Rent-stabilized units in 2024
6
About 100% of the building's 6 apartments

Counts come from owners' rent-stabilization filings shown on NYC Department of Finance tax bills, as extracted by JustFix. They tell you a building has stabilized apartments, not which ones.

Stabilized units by tax-bill year

Think your apartment is stabilized? Request its rent history from HCR (free), then check your renewal with the renewal calculator.

Violations

Most recent first. Showing up to 50 per agency.

HPD housing violations · 20

  • A

    File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.

    May 4, 2026

    Open — Nov sent out
  • I

    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.

    Nov 20, 2025

    Closed — Violation dismissed
  • A

    File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.

    Jun 9, 2025

    Open — Nov sent out
  • I

    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.

    Nov 29, 2024

    Closed — Violation dismissed
  • C

    Replace or repair the self-closing doors that is missing or defective building front entrance door (refit) , 1st story

    Jul 4, 2024

    Closed — Violation closed
  • B

    Refit building front entrance door , 1st story

    Jul 4, 2024

    Closed — Violation closed
  • B

    Repair or replace the smoke detector missing in the entire apartment located at apt 1f, 1st story, 1st apartment from north at east

    Jun 1, 2024 · Apt 1F

    Closed — Violation closed
  • C

    Remove device preventing door from being self-closing hook and eye at vestibule door at public hall, 1st story

    Jun 1, 2024

    Closed — Violation closed
  • C

    Replace or repair the self-closing doors that is missing or defective ... in the entrance located at apt 1f, 1st story, 1st apartment from north at east

    Jan 17, 2024 · Apt 1F

    Closed — Violation closed
  • A

    File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.

    Mar 22, 2023

    Closed — Violation dismissed
Show 10 more ↓
  • I

    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.

    Nov 14, 2022

    Closed — Violation dismissed
  • A

    File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.

    Feb 24, 2022

    Closed — Violation dismissed
  • B

    And dept. rules and regulations. remove the encumbrance obstructing egress from fire escapes consisting of buckets on 2nd story balcony at stack east yard at fire escape

    Apr 30, 2021

    Closed — Violation closed
  • B

    Remove all encumbrances consisting of child car toy at public hall, 1st story

    Apr 30, 2021

    Closed — Violation closed
  • A

    Post, in a form approved by the commissioner, and maintain a notice in a common area of the building regarding the procedures that should be followed when a gas leak is suspected

    Apr 30, 2021

    Closed — Violation closed
  • A

    File annual bedbug report in accordance with hpd rule as described on the back of this notice of violation or as described on hpds website, www.nyc.gov\hpd, search bed bugs.

    Apr 8, 2021

    Closed — Violation dismissed
  • I

    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.

    Apr 8, 2021

    Closed — Violation dismissed
  • I

    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.

    Oct 17, 2018

    Closed — Violation dismissed
  • C

    D26-17.10 adm code post notice, in form approved by the department, stating the name and location of the person designated by the owner to have key to building's heating system 1 sty public hall & boiler room dooor.

    Jul 7, 1986

    Closed — Violation closed
  • A

    D26-20.08 adm code post a proper notice of smoke detector requirements, in a form approved by the commissioner, at or near the mail box missing.

    Jul 7, 1986

    Closed — Violation closed

DOB building violations · 2

  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2010 inspection report

    Dec 13, 2011

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Jul 25, 1994

    Dob violation - dismissed

ECB violations · 2

  • Class - 3

    Failure to maintain buildings in code compliant manner: off street parking in r3-2 zoning without dob approval contrary to zr 25-62, bc 3202.2.2.4 and or / dot specification atoi silver toyota sedan with maryla

    Dec 26, 2025 · Penalty $250

    Active
  • Class - 3

    Failure to maintain buildings in code compliant manner: yellow paints on end of an illegal curb cut appox 10'0 wide with concrete filled front of the curb for enabling vehicle to drive onto the concrete pads at

    Dec 26, 2025 · Penalty $250

    Active

Complaints

  • Heat/hot water

    Entire building

    Jan 16, 2024 · Apt BLDG

    Close
  • Heat/hot water

    Entire building

    Jan 16, 2024 · Apt BLDG

    Close
  • Heat/hot water

    Entire building

    Jan 2, 2024 · Apt BLDG

    Close
  • Plumbing

    Water supply

    Jan 2, 2024 · Apt BLDG

    Close
  • Unsanitary condition

    Garbage/recycling storage

    Dec 31, 2021 · Apt BLDG

    Close
  • Unsanitary condition

    Garbage/recycling storage

    Dec 31, 2021 · Apt BLDG

    Close
  • Heat/hot water

    Entire building

    Nov 1, 2021 · Apt BLDG

    Close
  • Unsanitary condition

    Garbage/recycling storage

    Apr 19, 2021 · Apt BLDG

    Close
  • Heat/hot water

    Entire building

    Dec 8, 2017 · Apt 1R

    Close
  • Heating

    Heat related

    Dec 24, 2012 · Apt 2R

    Close
Show 10 more ↓
  • Heating

    Heat related

    Dec 6, 2012 · Apt 2R

    Close
  • Heating

    Heat related

    Nov 30, 2012 · Apt 1

    Close
  • Paint/plaster

    Ceiling

    Feb 15, 2005 · Apt 2R

    Close
  • Nonconst

    Vermin

    Feb 15, 2005 · Apt 2R

    Close
  • Nonconst

    Vermin

    Feb 15, 2005 · Apt 2R

    Close
  • Nonconst

    Vermin

    Feb 15, 2005 · Apt 2R

    Close
  • General

    Windows

    Feb 15, 2005 · Apt 2R

    Close
  • Heating

    Heat related

    Jan 22, 2005 · Apt 2R

    Close
  • Heating

    Heat related

    Jan 22, 2005 · Apt 2R

    Close
  • Heating

    Heat related

    Jan 10, 2004 · Apt BLDG

    Close

Sales history

No recorded sales in our data

Sales come from the NYC Department of Finance rolling sales file.

Building details

Building type
Walk-up apartment building (C2)
Year built
1928
Floors
3
Residential units
6
Building area
4,950 ft²
Lot area
1,980 ft²
Zoning
R3-2
Community board
318
Council district
45
Block / lot
7699 / 46
Assessed value
$332,550
Landmark / historic district
No

HPD registration #310549, last renewed Jul 28, 2026.

Questions about 3724 Flatlands Avenue

Who owns 3724 Flatlands Avenue?

The owner of record in NYC Department of City Planning PLUTO data is Marine Collective LLC.

Does 3724 Flatlands Avenue have violations?

Yes. NYC HPD has recorded 20 housing violations at this property.

Is 3724 Flatlands Avenue rent stabilized?

NYC Department of Finance tax bills listed 6 rent-stabilized units here in 2024 (about 100% of its 6 apartments). To confirm a specific apartment, request its rent history from NYS Homes and Community Renewal.

When was 3724 Flatlands Avenue built?

City records list 1928 as the year it was built.

How many apartments are in 3724 Flatlands Avenue?

It has 6 residential units.

Source: NYC Open Data (DCP PLUTO, HPD, DOB, ECB/OATH, DOF). Records can lag the city's systems. Data refreshed weekly.