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
No open immediately-hazardous violations among recent records.
Date of the most recent HPD inspection that found a problem.
No balance due on recent ECB violations.
Rent stabilization
No rent-stabilized units in 2018–2024 tax bills
Violations
Most recent first. Showing up to 50 per agency.
HPD housing violations · 188
- ANon-hazardous
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 - ANon-hazardous
§ 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 - CImmediately hazardous
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 - ANon-hazardous
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 - ANon-hazardous
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 - ANon-hazardous
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 - ANon-hazardous
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 - BHazardous
Remove the illegal fastening latch capable of being padlock at wood fence at west rear yard
Mar 23, 2025
Closed — Violation dismissed - ANon-hazardous
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 - CImmediately hazardous
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 ↓
- BHazardous
Remove the illegal fastening key operated lock installe at roof bulkhead door preventing re-entry from roof
Mar 23, 2025
Closed — Violation dismissed - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - BHazardous
§ 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 - BHazardous
Properly repair with similar material the broken or defective fire retardent plaster at ceiling at boiler room
Jun 18, 2024
Closed — Violation closed - ANon-hazardous
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 - IInformation / order
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 - ANon-hazardous
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 - IInformation / order
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 - IInformation / order
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 - ANon-hazardous
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 - ANon-hazardous
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 - IInformation / order
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 - IInformation / order
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 - IInformation / order
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 - IInformation / order
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 - IInformation / order
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 - IInformation / order
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 - IInformation / order
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - IInformation / order
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 - CImmediately hazardous
Provide pad locks for the entrance door at front areaway, 1st story
Apr 9, 2013
Closed — Violation closed - BHazardous
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 - IInformation / order
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 - CImmediately hazardous
Provide seal up of all openings throughout the entire building
Feb 12, 2013
Closed — Violation closed - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - IInformation / order
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 - CImmediately hazardous
Provide adequate supply of hot water for the fixtures in the entire building
Jan 23, 2013
Closed — Violation closed - CImmediately hazardous
Provide an adequate supply of gas to the fixtures stove, entire building
Jan 23, 2013
Closed — Violation dismissed - CImmediately hazardous
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
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.