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673 Classon Avenue

Brooklyn, NY 11238BBL 3-01149-0009Map

Owner of record: 673 Classon Avenue Realty LLC

673 Classon Avenue is a walk-up apartment building built in 1930 in Brooklyn, 11238. It has 8 residential units across 4 floors. The owner of record is 673 Classon Avenue Realty LLC. HPD has recorded 77 housing violations here, most recently on May 4, 2026. 12 of the 50 most recent violations are still open. City tax records listed 2 rent-stabilized apartments here in 2024.

HPD violations
77
DOB violations
23
ECB violations
6
HPD complaints
567

What to know

Concern
3 open Class C

Immediately hazardous issues among recent violations are still open.

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
2
About 25% of the building's 8 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 · 77

  • 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

    Closed — Violation dismissed
  • B

    Refit door in the bathroom located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Open — Nov sent out
  • B

    Repair, replace or provide an approved and operational smoke detecting device, installed in accordance with department of buildings rules and regulations missing in the entire apartment located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Closed — Violation dismissed
  • C

    Properly repair with similar material the broken or defective laminate floor tile in the 4th room from east located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Closed — Violation dismissed
  • B

    Properly repair or replace the broken or defective sliding door at entrance in the 4th room from east located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Open — Nov sent out
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color at ceiling and all walls in the 4th room from east located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Open — Nov sent out
  • C

    Properly repair with similar material the broken or defective laminate floor tile in the kitchen located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Closed — Violation dismissed
  • B

    Properly repair with similar material the broken or defective wood base cabinet at south in the kitchen located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Open — Nov sent out
  • C

    Properly repair or replace the broken or defective broken lower sash north window glass pane at west in the 4th room from east located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Closed — Violation dismissed
  • C

    Properly repair or replace the broken or defective lower sash north window counterbalance at west in the 4th room from east located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Closed — Violation dismissed
Show 40 more ↓
  • B

    Repair, replace or provide an approved and operational carbon monoxide detecting device, installed in accordance with applicable law and rules missing in the entire apartment located at apt 3r, 3rd story, 1st apartment from east at south

    Apr 10, 2026 · Apt 3R

    Closed — Violation dismissed
  • C

    Abate the infestation consisting of roaches in the entire apartment located at apt 4l, 4th story, 1st apartment from west at north

    Feb 27, 2026 · Apt 4L

    Closed — Violation dismissed
  • B

    Properly repair or replace the broken or defective light fixture at ceiling at vestibule

    Feb 27, 2026

    Closed — Violation dismissed
  • C

    Remove device preventing door from being self-closing consisting of permanently installed kickdown door stopper at building vestibule door

    Jul 10, 2025

    Closed — Violation closed
  • B

    Trace and repair the source and abate the visible mold condition... less than 10 sq.ft at ceiling in the 1st room from east located at apt 1r, 1st story, 1st apartment from east at south original violation 17728547 issued 01-mar-25 has been upgraded to class b per administrative code §27-2017.3a(3)(a) or (b).

    Mar 1, 2025 · Apt 1R

    Open — First no access to re- inspect violation
  • A

    Trace and repair the source and abate the visible mold condition... less than 10 sq.ft at ceiling in the 1st room from east located at apt 1r, 1st story, 1st apartment from east at south

    Mar 1, 2025 · Apt 1R

    Closed — Violation closed
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color the ceiling and south wall in the 1st room from east located at apt 1r, 1st story, 1st apartment from east at south

    Mar 1, 2025 · Apt 1R

    Closed — Violation dismissed
  • C

    Replace or repair the self-closing doors that is missing or defective hinges at door to rear yard in the 1st room from east located at apt 1r, 1st story, 1st apartment from east at south

    Mar 1, 2025 · Apt 1R

    Open — Nov sent out
  • B

    Properly repair or replace the broken or defective mechanical ventilation system at ceiling in the bathroom located at apt 1r, 1st story, 1st apartment from east at south

    Mar 1, 2025 · Apt 1R

    Closed — Violation dismissed
  • C

    Remove device preventing door from being self-closing kickstand doorstop at vestibule door , 1st story

    Mar 1, 2025

    Closed — Violation dismissed
  • B

    Repair the roof so that it will not leak at ceiling in the 1st room from east located at apt 4l, 4th story, 1st apartment from west at north

    Apr 12, 2024 · Apt 4L

    Closed — Violation dismissed
  • A

    Repair the broken or defective plastered surfaces and paint in a uniform color at ceiling in the 1st room from east located at apt 4l, 4th story, 1st apartment from west at north

    Apr 12, 2024 · Apt 4L

    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.

    Apr 9, 2024

    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.

    Mar 22, 2023

    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.

    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 23, 2022

    Closed — Violation dismissed
  • B

    Repair the roof so that it will not leak above the ceiling in the bathroom located at apt 4r, 4th story, 1st apartment from east at south

    Sep 3, 2021 · Apt 4R

    Closed — Violation dismissed
  • A

    Paint with light colored paint to the satisfaction of this department at ceiling in the bathroom located at apt 4r, 4th story, 1st apartment from east at south

    Sep 3, 2021 · Apt 4R

    Closed — Violation dismissed
  • C

    Abate the infestation consisting of roaches in the entire apartment located at apt 4r, 4th story, 1st apartment from east at south

    Sep 3, 2021 · Apt 4R

    Closed — Violation dismissed
  • B

    Repair the roof so that it will not leak at ceiling in the 1st room from east located at apt 4l, 4th story, 1st apartment from west at north

    Sep 2, 2021 · Apt 4L

    Closed — Violation dismissed
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color ceiling in the 1st room from east located at apt 4l, 4th story, 1st apartment from west at north

    Sep 2, 2021 · Apt 4L

    Closed — Violation dismissed
  • B

    Repair or replace the smoke detector missing in the entire apartment located at apt 4l, 4th story, 1st apartment from west at north

    Sep 2, 2021 · Apt 4L

    Closed — Violation dismissed
  • B

    Repair or replace the carbon monoxide detecting device(s). missing in the entire apartment located at apt 4l, 4th story, 1st apartment from west at north

    Sep 2, 2021 · Apt 4L

    Closed — Violation dismissed
  • B

    Repair the roof so that it will not leak at ceiling in the bathroom located at apt 4l, 4th story, 1st apartment from west at north

    Sep 2, 2021 · Apt 4L

    Closed — Violation dismissed
  • A

    Paint with light colored paint to the satisfaction of this department ceiling in the bathroom located at apt 4l, 4th story, 1st apartment from west at north

    Sep 2, 2021 · Apt 4L

    Closed — Violation dismissed
  • C

    Code: arrange and make self-closing the doors .. in the entrance located at apt 4l, 4th story, 1st apartment from west at north

    Sep 2, 2021 · Apt 4L

    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.

    Apr 7, 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 29, 2019

    Closed — Violation dismissed
  • B

    Properly repair with similar material the broken or defective 2nd and 3rd concrete tread from bottom at building front at stoop

    Mar 1, 2018

    Closed — Violation closed
  • B

    Properly repair with similar material the broken or defective masonary bricks at 4th story, building north exterior wall

    Mar 1, 2018

    Open — Nov sent out
  • 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 at public hall, 1st story

    Jun 24, 2017

    Open — Nov sent out
  • B

    Repair or replace the smoke detector inoperable located at apt 1l, 1st story, apartment at north

    Jun 22, 2017 · Apt 1L

    Closed — Violation closed
  • B

    Repair or replace the carbon monoxide detecting device(s). inoperable located at apt 1l, 1st story, apartment at north

    Jun 22, 2017 · Apt 1L

    Closed — Violation closed
  • C

    M/d law abate the nuisance consisting of hotwater exceeding the maximum temp. of 130 degrees at all fixtures in the entire apartment located at apt 1l, 1st story, apartment at north

    Jun 22, 2017 · Apt 1L

    Open — Nov sent out
  • 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 at public hall, 1st story

    Jun 19, 2017

    Open — Nov sent out
  • C

    Provide an adequate supply of gas to the fixtures at stove in the kitchen located at apt 1r, 1st story, 1st apartment from east at south

    Jun 1, 2017 · Apt 1R

    Closed — Violation closed
  • A

    Post and maintain a proper notice on wall of the entrance story in english and spanish on the availability of the agencys housing information guide. a sample notice can be found at www.nyc.gov/hpd. at public hall, 1st story

    May 10, 2017

    Open — Nov sent out
  • A

    Post a proper notice of carbon monoxide detecting device requirements, in a form approved by the commissioner, in a common area of a class a multiple dwelling near inspection certificate or provide notice to tenants in a private dwelling. at public hall, 1st story

    May 10, 2017

    Closed — Violation closed
  • C

    M/d law abate the nuisance consisting of hot water exceeding the maximum temperature of 130 degrees. temperature at time of inspection was 143. thermometer #-92028 in the entire apartment located at apt 1l, 1st story, apartment at north

    May 10, 2017 · Apt 1L

    Open — Not complied with
  • B

    Repair or replace the carbon monoxide detecting device(s). defective located at apt 1l, 1st story, apartment at north

    May 10, 2017 · Apt 1L

    Closed — Violation closed

DOB building violations · 23

  • Low pressure boiler boiler required

    Violation issued-failure to file 2022 external low pressure inspection

    Apr 25, 2023

    Dob violation - active
  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2017 inspection report

    Nov 8, 2019

    Dob violation - active
  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2016 inspection report

    Apr 6, 2018

    Dob violation - active
  • Fail to certify class 1 none

    Failure to certify correction on immediately hazardous (class 1) ecb violation

    Nov 29, 2017

    Dob violation - dismissed
  • Fail to certify class 1 none

    Failure to certify correction on immediately hazardous (class 1) ecb violation

    Nov 29, 2017

    Dob violation - dismissed
  • Fail to certify class 1 none

    Failure to certify correction on immediately hazardous (class 1) ecb violation

    Jul 26, 2017

    Dob violation - dismissed
  • Fail to certify class 1 none

    Failure to certify correction on immediately hazardous (class 1) ecb violation

    Dec 2, 2015

    Dob violation - dismissed
  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2014 inspection report

    Oct 1, 2015

    Dob violation - active
  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2013 inspection report

    Mar 3, 2015

    Dob violation - active
  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2012 inspection report

    May 15, 2014

    Dob violation - active
Show 13 more ↓
  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2011 inspection report

    Mar 1, 2013

    Dob violation - active
  • Low pressure boiler boiler required

    Violation issued for failure to file annual boiler 2010 inspection report

    Dec 13, 2011

    Dob violation - active
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Jan 19, 2007

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Jan 6, 2006

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Feb 13, 2004

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Mar 19, 2003

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Mar 26, 2002

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Feb 27, 2001

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Aug 29, 1995

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Aug 29, 1995

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Jun 1, 1994

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Aug 16, 1993

    Dob violation - active
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Jun 1, 1993

    Dob violation - dismissed

ECB violations · 6

  • Class - 1

    Failure to have new or altered plumbing system tested. at time of my inspection i observed in apt #3r the installation of 2 gas fired space heaters that have not been tested. utility company locked gas service

    Apr 24, 2017 · Penalty $1,000

    Resolve
  • Class - 1

    Work w/o a permit. at time of inspection i observed in apt#3r 2 illegal space heaters(gas fired)installed in the bedroom & in the kitchen they were installed w/o a permit on file. utility company locked gas ser

    Apr 24, 2017 · Penalty $800

    Resolve
  • Class - 1

    Failure to maintain bldg in code compliant manner. at time of my inspection i observed in apt#3r 2 gas fired space heaters installed using agas flex connector that material is prohibited in this case need to be

    Apr 24, 2017 · Penalty $1,000

    Resolve
  • Class - 1

    Gas being supplied to bldg w/o inspection & certification by dob. at time of my inspection i observed in apt#3r gas being supplied w/o inspection & certification by dob after new gas fired space heaters were in

    Apr 24, 2017 · Penalty $1,000

    Resolve
  • Class - 1

    Work w/o permit work noted i observed in apt 3l in the front and rear of the apt two heating units mounted on the wall connected w/ a gas line.no permits filed with the dob.the heating units are vented throug

    Sep 3, 2015 · Penalty $1,600

    Resolve
  • Non-hazardous

    Failure to maintain defect is:approx 1'-0" wide x 3'-0" long section of plaster ceiling fell in closet of apt 3r.(3rd story rear)adjacent to apartment entrance door.remedy:make all necessary safe and lawful rep

    Dec 14, 2000 · Penalty $2,500

    Resolve

Complaints

  • Unsanitary condition

    Mold

    Apr 7, 2026 · Apt 3R

    Close
  • Door/window

    Window pane

    Apr 7, 2026 · Apt 3R

    Close
  • Flooring/stairs

    Floor

    Apr 7, 2026 · Apt 3R

    Close
  • Door/window

    Door

    Apr 7, 2026 · Apt 3R

    Close
  • Paint/plaster

    Wall

    Apr 7, 2026 · Apt 3R

    Close
  • Safety

    Smoke detector

    Apr 7, 2026 · Apt 3R

    Close
  • Plumbing

    Basin/sink

    Apr 7, 2026 · Apt 3R

    Close
  • Door/window

    Door

    Apr 7, 2026 · Apt 3R

    Close
  • Electric

    Lighting

    Feb 25, 2026 · Apt 4L

    Close
  • Electric

    Lighting

    Feb 25, 2026 · Apt 4L

    Close
Show 40 more ↓
  • Unsanitary condition

    Pests

    Feb 25, 2026 · Apt 4L

    Close
  • Door/window

    Window pane

    Feb 25, 2026 · Apt 3R

    Close
  • Paint/plaster

    Wall

    Feb 25, 2026 · Apt 3R

    Close
  • General

    Cabinet

    Feb 25, 2026 · Apt 3R

    Close
  • Flooring/stairs

    Floor

    Feb 25, 2026 · Apt 3R

    Close
  • Paint/plaster

    Wall

    Feb 25, 2026 · Apt 3R

    Close
  • Unsanitary condition

    Mold

    Feb 25, 2026 · Apt 3R

    Close
  • Door/window

    Door

    Feb 25, 2026 · Apt 3R

    Close
  • Door/window

    Window frame

    Feb 25, 2026 · Apt 3R

    Close
  • Plumbing

    Basin/sink

    Feb 25, 2026 · Apt 3R

    Close
  • Door/window

    Door

    Feb 25, 2026 · Apt 3R

    Close
  • Safety

    Smoke detector

    Feb 25, 2026 · Apt 3R

    Close
  • Safety

    Carbon monoxide detector

    Feb 25, 2026 · Apt 3R

    Close
  • Water leak

    Slow leak

    May 14, 2025 · Apt 4L

    Close
  • Heat/hot water

    Apartment only

    Mar 2, 2025 · Apt 1R

    Close
  • Heat/hot water

    Apartment only

    Mar 2, 2025 · Apt 1R

    Close
  • Unsanitary condition

    Mold

    Feb 27, 2025 · Apt 1R

    Close
  • Heat/hot water

    Apartment only

    Feb 27, 2025 · Apt 1R

    Close
  • Unsanitary condition

    Pests

    Feb 27, 2025 · Apt YARD

    Close
  • Unsanitary condition

    Mold

    Feb 27, 2025 · Apt YARD

    Close
  • Water leak

    Damp spot

    Apr 12, 2024 · Apt 4R

    Close
  • Water leak

    Damp spot

    Apr 12, 2024 · Apt 4R

    Close
  • Water leak

    Slow leak

    Apr 12, 2024 · Apt 4R

    Close
  • Plumbing

    Water supply

    Nov 25, 2023 · Apt BLDG

    Close
  • Paint/plaster

    Ceiling

    Nov 25, 2023 · Apt 4L

    Close
  • Plumbing

    Water supply

    Nov 25, 2023 · Apt 4L

    Close
  • Unsanitary condition

    Mold

    Oct 19, 2023 · Apt 1R

    Close
  • Water leak

    Heavy flow

    Oct 19, 2023 · Apt 1R

    Close
  • Heat/hot water

    Apartment only

    Dec 24, 2022 · Apt 3L

    Close
  • Heat/hot water

    Apartment only

    Sep 2, 2021 · Apt 4R

    Close
  • Water leak

    Damp spot

    Sep 2, 2021 · Apt 4R

    Close
  • Water leak

    Slow leak

    Sep 2, 2021 · Apt 4R

    Close
  • Water leak

    Heavy flow

    Aug 24, 2021 · Apt 4L

    Close
  • Heat/hot water

    Apartment only

    Feb 1, 2021 · Apt 3L

    Close
  • Electric

    Lighting

    Jan 17, 2019 · Apt 3R

    Close
  • Plumbing

    Basin/sink

    Jan 17, 2019 · Apt 3R

    Close
  • Electric

    Outlet/switch

    Jan 17, 2019 · Apt 3R

    Close
  • Unsanitary condition

    Garbage/recycling storage

    Feb 27, 2018 · Apt BLDG

    Close
  • General

    Cooking gas

    May 29, 2017 · Apt 1R

    Close
  • General

    Cooking gas

    May 11, 2017 · 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 (C1)
Year built
1930
Floors
4
Residential units
8
Building area
6,100 ft²
Lot area
2,676 ft²
Zoning
R6A
Community board
308
Council district
35
Block / lot
1149 / 9
Assessed value
$906,300
Landmark / historic district
No

HPD registration #306573, last renewed Sep 13, 2025.

Questions about 673 Classon Avenue

Who owns 673 Classon Avenue?

The owner of record in NYC Department of City Planning PLUTO data is 673 Classon Avenue Realty LLC.

Does 673 Classon Avenue have violations?

Yes. NYC HPD has recorded 77 housing violations at this property.

Is 673 Classon Avenue rent stabilized?

NYC Department of Finance tax bills listed 2 rent-stabilized units here in 2024 (about 25% of its 8 apartments). To confirm a specific apartment, request its rent history from NYS Homes and Community Renewal.

When was 673 Classon Avenue built?

City records list 1930 as the year it was built.

How many apartments are in 673 Classon Avenue?

It has 8 residential units.

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