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727 Knickerbocker Avenue

Brooklyn, NY 11221BBL 3-03392-0004Map

Owner of record: 727 Knickerbocker Ave LLC

727 Knickerbocker Avenue is a walk-up apartment building built in 1906 in Brooklyn, 11221. It has 8 residential units across 4 floors. The owner of record is 727 Knickerbocker Ave LLC. HPD has recorded 188 housing violations here, most recently on June 10, 2025.

HPD violations
188
DOB violations
15
ECB violations
17
HPD complaints
239

What to know

Good
No open Class C

No open immediately-hazardous violations among recent records.

Good
Last violation Jun 10, 2025

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

No rent-stabilized units in 2018–2024 tax bills

Some apartments can still be regulated. Use the rent-stabilized checker or request the rent history from HCR.

Violations

Most recent first. Showing up to 50 per agency.

HPD housing violations · 188

  • 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 10, 2025

    Closed — Violation dismissed
  • A

    § 300 m/d law file plans and application and legalize the following alteration or restore to the legal condition existing prior to the making of said alteration wood deck installed at roof

    Mar 23, 2025

    Closed — Violation dismissed
  • C

    Post notice, in form approved by the department, stating the name and location of the person designated by the owner to have key to buildings heating system (unacceptable paper sign present at time of inspection) at public hall, 1st story

    Mar 23, 2025

    Closed — Violation dismissed
  • A

    Post a proper notice of smoke detector requirements, in a form approved by the commissioner, at or near the mail box (unacceptable paper sign present at time of inspection) at public hall, 1st story

    Mar 23, 2025

    Closed — Violation dismissed
  • A

    Post and maintain a proper sign on wall of entrance story showing the registration number assigned by the department and the address of the building. at public hall, 1st story

    Mar 23, 2025

    Closed — Violation dismissed
  • 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.

    Mar 23, 2025

    Closed — Violation dismissed
  • 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

    Mar 23, 2025

    Closed — Violation dismissed
  • B

    Remove the illegal fastening latch capable of being padlock at wood fence at west rear yard

    Mar 23, 2025

    Closed — Violation dismissed
  • 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.

    Mar 23, 2025

    Closed — Violation dismissed
  • C

    Remove the illegal fastening latch and eye capable of being padlocked at wood deck structure obstructing egress to the gooseneck at fire escape at the roof

    Mar 23, 2025

    Closed — Violation dismissed
Show 40 more ↓
  • B

    Remove the illegal fastening key operated lock installe at roof bulkhead door preventing re-entry from roof

    Mar 23, 2025

    Closed — Violation dismissed
  • C

    Remove the illegal fastening hook and eye at gate capable of being padlock at wood deck structure obstructing egress to the gooseneck at fire escape

    Mar 23, 2025

    Closed — Violation dismissed
  • C

    M/d law abate the nuisance consisting of defective metal grate at floor from cellar to rear yard (trip hazard)

    Mar 23, 2025

    Closed — Violation dismissed
  • C

    Replace or repair the self-closing doors that is missing or defective hinges at gym door 1st room from east at cellar

    Mar 23, 2025

    Closed — Violation dismissed
  • B

    § 53,187,231 m/d law & dept rules & reg. provide means of egress from yard to street by fireproof passageway for which application must be filed for approval,or by unlocked door or gate in fence to adjoining premises with consent of adjacent owner.

    Jun 18, 2024

    Closed — Violation closed
  • B

    Properly repair with similar material the broken or defective fire retardent plaster at ceiling at boiler room

    Jun 18, 2024

    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 10, 2024

    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 21, 2023

    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 23, 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 10, 2022

    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.

    Feb 25, 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 25, 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.

    Apr 9, 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 30, 2019

    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 18, 2018

    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 24, 2017

    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 10, 2016

    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 9, 2015

    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.

    Feb 23, 2015

    Closed — Violation dismissed
  • I

    The premises has been selected to participate in the alternative enforcement program which may result in building-wide inspections, fees, and extensive repair work to correct violations and underlying conditions. charges for repair work done pursuant to this order, if not paid, will become liens on the property

    Feb 2, 2015

    Closed — Violation dismissed
  • C

    Remove the accumulation of refuse and/or rubbish and maintain in a clean condition the front areaway, mounds of garbage from bldg.

    Jun 18, 2013

    Closed — Violation closed
  • C

    Remove the accumulation of refuse and/or rubbish and maintain in a clean condition the construction material and debris piling up at front areaway

    May 17, 2013

    Closed — Violation closed
  • I

    Above premises have been vacant and untenanted except for caretaker for 60 days or more, and cannot be reoccupied until a new certificate of occupancy has been obtained. premises have been vacant since february 23, 2013

    May 9, 2013

    Closed — Violation closed
  • C

    Provide pad locks for the entrance door at front areaway, 1st story

    Apr 9, 2013

    Closed — Violation closed
  • B

    Remove the accumulation of refuse and/or rubbish and maintain in a clean condition the rubbish, filled garbage bags, and wood skids at front areaway

    Apr 1, 2013

    Closed — Violation closed
  • I

    The premises have been vacated by an order of this department and cannot be reoccupied except for caretaker until a new certificate of occupancy has been obtained.

    Feb 21, 2013

    Closed — Violation closed
  • C

    Provide seal up of all openings throughout the entire building

    Feb 12, 2013

    Closed — Violation closed
  • C

    Provide a safe and adequate supply of electric service to the fixtures throughout all landings from bulkhead to building entrance at public hall stairs

    Feb 8, 2013

    Closed — Violation closed
  • C

    Provide hot water at all hot water fixtures in the entire apartment located at apt 4, 4th story, 1st apartment from west at north

    Feb 7, 2013 · Apt 4

    Closed — Violation closed
  • C

    Provide a safe and adequate supply of electric service to the fixtures throughout all stories from building entrance to bulkhead at public hall stairs

    Feb 7, 2013

    Closed — Violation closed
  • C

    Provide an adequate supply of heat from an approved central heating system, or an approved system of gas or electrical heating in good operating condition for the dwelling unit in the entire apartment located at apt 4, 4th story, 1st apartment from west at north

    Feb 7, 2013 · Apt 4

    Closed — Violation dismissed
  • C

    Provide hot water at all hot water fixtures in the entire apartment located at apt 4, 4th story, 1st apartment from south at west

    Feb 4, 2013 · Apt 4

    Closed — Violation closed
  • C

    Provide an adequate supply of heat from an approved central heating system, or an approved system of gas or electrical heating in good operating condition for the dwelling unit in the entire apartment located at apt 4, 4th story, 1st apartment from south at west

    Feb 4, 2013 · Apt 4

    Closed — Violation dismissed
  • C

    Provide an adequate supply of heat from an approved central heating system, or an approved system of gas or electrical heating in good operating condition for the dwelling unit in the entire apartment located at apt 1, 1st story, 1st apartment from south at west

    Feb 4, 2013 · Apt 1

    Closed — Violation dismissed
  • C

    Provide hot water at all hot water fixtures in the entire apartment located at apt 1, 1st story, 1st apartment from south at west

    Feb 4, 2013 · Apt 1

    Closed — Violation closed
  • C

    Properly repair and abate unsafe electric wiring condition consisting of electric wire tapping, at main electric pannel feeding all apt's throughout building from main electric pannel at cellar

    Feb 4, 2013

    Closed — Violation closed
  • I

    The premises has been selected to participate in the alternative enforcement program which may result in building-wide inspections, fees, and extensive repair work to correct violations and underlying conditions. charges for repair work done pursuant to this order, if not paid, will become liens on the property

    Jan 31, 2013

    Closed — Violation dismissed
  • C

    Provide adequate supply of hot water for the fixtures in the entire building

    Jan 23, 2013

    Closed — Violation closed
  • C

    Provide an adequate supply of gas to the fixtures stove, entire building

    Jan 23, 2013

    Closed — Violation dismissed
  • C

    Provide an adequate supply of heat from an approved central heating system, or an approved system of gas or electrical heating in good operating condition for the dwelling unit in the entire apartment located at apt 3, 3rd story, 1st apartment from south at west

    Jan 23, 2013 · Apt 3

    Closed — Violation dismissed

DOB building violations · 15

  • Fail to certify class 1 none

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

    May 8, 2013

    Dob violation - dismissed
  • Fail to certify class 1 none

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

    Dec 14, 2011

    Dob violation - dismissed
  • Fail to certify class 1 none

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

    Jan 13, 2011

    Dob violation - dismissed
  • Fail to certify class 1 none

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

    Jan 13, 2011

    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

    Feb 7, 2000

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Mar 16, 1999

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    May 4, 1998

    Dob violation - dismissed
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Sep 16, 1997

    Dob violation - dismissed
Show 5 more ↓
  • Boilers boiler required

    Ll6291-local law 62/91 - boilers boiler required

    Feb 10, 1997

    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 · 17

  • Class - 1

    Unlawful acts. failure to comply with commissioner's order for summons # 39138223m issued 2/12/25., comply with commissioner's order

    Apr 28, 2026 · Penalty $2,500

    Active
  • Class - 1

    Work does not conform to approved construction documents and/or approved amendments. noted; at roof level deck is composed of flammable, wood 2x4's platform with trex decking atop contrary to plans job #b080530

    Apr 28, 2026 · Penalty $2,500

    Active
  • Class - 2

    Failure to conduct or file a final inspection of permitted work with the department. noted: application # b08053092-i1-gc expired on 3/8/25 and no final inspection conducted., conduct/file final inspection

    Apr 28, 2026 · Penalty $1,250

    Active
  • Class - 1

    Work without a permit. at time of inspection. at time inspection, observed at roof, erected 6 feet in height wood panel fence/walls to convert the roof to a terrace for a recreational use., obtain permit

    Feb 12, 2025 · Penalty $2,500

    Active
  • Class - 1

    Failure to maintain building in code-compliant manner. at time inspection, observed at roof, erected 6 feet in height wood panel fence/walls without a 6 feet clearance from the parapet wall for first responders

    Feb 12, 2025 · Penalty $1,250

    Resolve
  • Class - 1

    Occupancy contrary to that allowed by the certificate of occupancy (co) or department of building (dob) records. at time inspection, observed at roof, erected 6 feet in height wood panel fence/walls to convert

    Feb 12, 2025

    Resolve
  • Class - 2

    Ý4¨rinnai cu199in hwh's 800,000btu's total venting onto public side walk, maintain boiler; follow rinnai manufactures venting instructions and nyc fuel gas code-chapter 5 chimney+vents;correct violation+submit

    Jun 4, 2024 · Penalty $310

    Resolve
  • Class - 2

    Fail to comply w/commissioner order to file cert of correction w/dob for nov #35000263j issued on 02/15/13.remedy:file a certificate of correction.

    Jun 12, 2013 · Penalty $8,000

    Resolve
  • Class - 1

    Occupancy contrary to that allowed by cofo or bldg dept records.building occupied contrary to co#301110143. occupancy changed from 4 class "a"apts to sro's throughout entire building.total of 16 sro rooms for

    Feb 15, 2013 · Penalty $12,000

    Resolve
  • Class - 2

    Failure to comply w/the commissioner's order to file a c of c w/the dept of buildings for notice of violation #34916793k issued on 9/16/11 pursuant to 28-204.4 & 1rcny 102-01. remedy: file a c of c.

    Jan 5, 2012 · Penalty $2,000

    Resolve
Show 7 more ↓
  • Class - 2

    Failure to comply w/ the commissioner's order to file a certificate ofcorrection w/ the dept. of bldg for notice of violation # 34916793k issued on 09/16/11 pursuant to 28-204.4 & 1rcny 102-01. remedy: file a

    Nov 22, 2011 · Penalty $4,000

    Resolve
  • Class - 1

    Occupancy contrary to that allowed by the c/o or c of o#301110143f indicates premises to be a (4)fam.dwelling now premises occupied & arranged as a 3/4"house with approx 40 occupants throughout,w/house manager

    Sep 16, 2011 · Penalty $25,000

    Resolve
  • Class - 2

    Failure to maintain bldg in code compliant manner:installation of plumbing materials per p.c.102.3-27-902.i observed in boiler room multiple gas flex's connecting several boilers & water heaters.rem:remove non

    Apr 22, 2011 · Penalty $2,500

    Resolve
  • Class - 2

    Failure to file certificate of correction for vio's #34883154x #34883155h. remedy: file certs of correction.

    Jan 26, 2011 · Penalty $800

    Resolve
  • Class - 1

    Failure to maintain bldg in code complaint manner.use of prohibited hardware note:keylocked door @ room with rear fire escape & fixed windowbars @ rear windows are illegal hardware & an obstruction of egress

    Oct 23, 2010 · Penalty $1,000

    Resolve
  • Class - 1

    Occupancy contrary to cofo.note:cofo#301110143f indicates c1 walk-up apts of 1-dwelling unit per flr.bldg now arranged & occupied as shelter/halfway house with approx 9bunk beds on flr#1 & 9 bunk beds on fl#3

    Oct 23, 2010 · Penalty $2,400

    Resolve
  • Hazardous

    Occupancy contrary to that allowed by the building department records-hazardous.noted:cellar level of dwelling is occupied by 1 person with 2 beds,2 t.v. sets,plyers and electronic sound systems set up at front

    Jul 29, 2005 · Penalty $800

    Resolve

Complaints

  • Unsanitary condition

    Mold

    Jul 27, 2025 · Apt 1A

    Close
  • Unsanitary condition

    Mold

    Jan 6, 2025 · Apt 1A

    Close
  • Electric

    Wiring

    Feb 15, 2013 · Apt BLDG

    Close
  • Heating

    Heat related

    Feb 5, 2013 · Apt 4

    Close
  • General

    Cooking gas

    Feb 5, 2013 · Apt 4

    Close
  • Electric

    Electric-supply

    Feb 5, 2013 · Apt 4

    Close
  • Heating

    Heat related

    Jan 26, 2013 · Apt 2

    Close
  • Heating

    Heat related

    Jan 20, 2013 · Apt 4

    Close
  • Heating

    Heat related

    Jan 19, 2013 · Apt 3

    Close
  • Heating

    Heat related

    Jan 9, 2013 · Apt 2

    Close
Show 40 more ↓
  • Heating

    Heat related

    Jan 9, 2013 · Apt 2

    Close
  • Heating

    Heat related

    Jan 6, 2013 · Apt NA

    Close
  • Nonconst

    Vermin

    Nov 20, 2012 · Apt 2

    Close
  • Heating

    Heat related

    Nov 20, 2012 · Apt NA

    Close
  • Heating

    Heat related

    Nov 19, 2012 · Apt NA

    Close
  • Paint/plaster

    Ceiling

    Oct 16, 2012 · Apt 3

    Close
  • Plumbing

    Water-leaks

    Oct 16, 2012 · Apt 3

    Close
  • Paint/plaster

    Wall

    Oct 16, 2012 · Apt 3

    Close
  • Nonconst

    Vermin

    Oct 16, 2012 · Apt 3

    Close
  • Heating

    Heat related

    Oct 12, 2012 · Apt 4

    Close
  • Heating

    Heat related

    Oct 10, 2012 · Apt 3

    Close
  • Nonconst

    Vermin

    Sep 6, 2012 · Apt 2

    Close
  • Nonconst

    Vermin

    Sep 6, 2012 · Apt 2

    Close
  • Nonconst

    Vermin

    Sep 6, 2012 · Apt 2

    Close
  • Nonconst

    Vermin

    Sep 5, 2012 · Apt 2

    Close
  • Heating

    Heat related

    Aug 21, 2012 · Apt 3FL

    Close
  • Heating

    Heat related

    Aug 20, 2012 · Apt 4

    Close
  • Appliance

    Electric/gas range

    Jul 19, 2012 · Apt 2FL

    Close
  • Heating

    Heat related

    Jul 19, 2012 · Apt 2FL

    Close
  • Nonconst

    Vermin

    Jul 19, 2012 · Apt 2FL

    Close
  • Nonconst

    Vermin

    Jul 19, 2012 · Apt 2FL

    Close
  • Nonconst

    Vermin

    Jul 19, 2012 · Apt 2FL

    Close
  • Heating

    Heat related

    Jul 19, 2012 · Apt 2FL

    Close
  • Plumbing

    Basin/sink

    Jul 18, 2012 · Apt 4

    Close
  • General

    Windows

    Jul 18, 2012 · Apt 4

    Close
  • General

    Mold

    Jul 18, 2012 · Apt 4

    Close
  • Paint/plaster

    Wall

    Jul 18, 2012 · Apt 4

    Close
  • General

    Windows

    Jul 18, 2012 · Apt 4

    Close
  • Paint/plaster

    Wall

    Jul 18, 2012 · Apt 4

    Close
  • Electric

    Bell-buzzer/intercom

    Jul 18, 2012 · Apt 4

    Close
  • Nonconst

    Vermin

    Jul 18, 2012 · Apt 4

    Close
  • Nonconst

    Vermin

    Jul 18, 2012 · Apt 4

    Close
  • General

    Cabinet

    Jul 18, 2012 · Apt 4

    Close
  • Heating

    Heat related

    Jul 18, 2012 · Apt 4

    Close
  • General

    Cabinet

    Jul 18, 2012 · Apt 4

    Close
  • Paint/plaster

    Wall

    Jul 18, 2012 · Apt 4

    Close
  • Nonconst

    Vermin

    Jul 18, 2012 · Apt 4

    Close
  • General

    Doors

    Jul 18, 2012 · Apt 4

    Close
  • Plumbing

    Water-leaks

    Jul 18, 2012 · Apt 4

    Close
  • General

    Floor

    Jul 18, 2012 · Apt 4

    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
1906
Floors
4
Residential units
8
Building area
9,110 ft²
Lot area
2,600 ft²
Zoning
R6
Community board
304
Council district
37
Block / lot
3392 / 4
Assessed value
$1,058,850
Landmark / historic district
No

HPD registration #333116, last renewed Jun 2, 2025.

Questions about 727 Knickerbocker Avenue

Who owns 727 Knickerbocker Avenue?

The owner of record in NYC Department of City Planning PLUTO data is 727 Knickerbocker Ave LLC.

Does 727 Knickerbocker Avenue have violations?

Yes. NYC HPD has recorded 188 housing violations at this property.

Is 727 Knickerbocker Avenue rent stabilized?

No rent-stabilized units appear in its 2018–2024 tax bills. Individual apartments can still be regulated, so request the rent history from NYS Homes and Community Renewal if unsure.

When was 727 Knickerbocker Avenue built?

City records list 1906 as the year it was built.

How many apartments are in 727 Knickerbocker 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.