519 Knickerbocker Avenue, Brooklyn, NY 11237
Built 1905 · 4-story walk-up with stores · 6 apartments
4 immediately hazardous violations open. 20 open in all. On the state's rent-stabilization list for 2024.
- Tenant reviews
- None yetLived here? Reviews open soon.
- Open violations
- 204 · 14 · 2
- Public record
- Updated todayFrom the city’s own data (, 311, the courts), refreshed nightly.
Violations issued each year
| Year | Hazardous | Non-hazardous |
|---|---|---|
| 2022 | 0 | 0 |
| 2023 | 9 | 0 |
| 2024 | 0 | 0 |
| 2025 | 2 | 0 |
| 2026 so far | 0 | 0 |
Plus 29 violations from 2009 to 2021. Counted when issued, whether open or fixed since. Paperwork left out.
See every violation- Found most often since 2022
- Walls and ceilings 4
- Doors and windows 3
- Fire and safety equipment 2
- Open per apartment
- 3.3 (20 open across 6 apartments)
- Inspector last found a problem
- 29 Jun 2025 (visits that find nothing are not published)
What do these labels mean?Where each of these comes from
- Tenant-reported
- A resident's firsthand account of living here, moderated before it publishes, and labelled with whether we verified they lived there.
- Official violation
- A city inspector visited and recorded a code violation. HPD's own words, and its own hazard class.
- Public complaint
- A complaint somebody made to a city system, through HPD or 311. A report, not a finding: nobody has necessarily inspected it.
- Public filing
- A permit, a registration, a bedbug report: a document the owner filed with the city because the law requires it.
- Court record
- A Housing Court case HPD brought against the owner, or an eviction a city marshal carried out. A court's record: a case is an allegation until it ends in a finding.
- Insufficient data
- Not enough current information here to infer a pattern either way.
Tenant reviews
Tenant-reportedNo tenant reviews yet. Lived here? Be the first.
Nothing above this section came from a tenant. It is all filed by the city, which means it only holds what somebody reported and an inspector wrote down, not what it is actually like to live here.
Not open yet. Reviews open when this neighbourhood does.
Heat season
No heat or hot-water complaints or violations were recorded here last winter (2025–26). That is the city's record: it only holds what somebody reported.
| Winter | DaysDays with complaints | Complaints | Violations |
|---|---|---|---|
| 2025–26 | 0 | 0 | 0 |
The rules, 1 October to 31 May: from 6am to 10pm, when it is below 55°F outside, the apartment must be at least 68°F; overnight it must be at least 62°F whatever the weather. Hot water must be at least 120°F all year. A tenant without heat can report it to 311.
Rent stabilization
Public filingThe owner registered at least one rent-stabilized apartment here with the state for 2024. The list does not say which apartments, or how many.
Source: Rent Guidelines Board building list, from the state's 2024 registrations. To know about one apartment, a tenant can ask the state for its rent history through Ask HCR.
City violations
Official violationImmediately hazardous4 open
Class C. HPD considers the condition an immediate danger: no heat in winter, no hot water, lead paint where a child lives, a broken lock on the front door. The owner has 24 hours to correct it.
Replace with new the broken or defective glass at lower sash window in the 3rd room from east, 3rd story at north
Issued 26 Mar 2023Notice certified late 2 May 2023Doors and windows§ 27-2005
Properly repair the source and abate the evidence of a water leak at ceiling in the 1st room from east, 3rd story at north
Issued 26 Mar 2023Notice certified late 2 May 2023Leaks and plumbing§ 27-2026
Abate the infestation consisting of roaches in the entire apartment, 3rd story at north
Issued 14 Feb 2019Notice of issuance sent to tenant 14 Apr 2019Pests§ 27-2017.4
Provide ready access to buildings heating system door lock at cellar
Issued 29 Mar 2009Notice sent out 30 Mar 2009Heat and hot water§ 27-2033
Hazardous14 open
Class B. A hazardous condition: a leak, mould, a defective floor. The owner has 30 days to correct it.
Repair or replace the smoke detector missing in the entire apartment, 3rd story at north
Issued 29 Jun 2025Notice sent out 6 Jul 2025Fire and safety equipment§ 27-2045
Repair or replace the carbon monoxide detecting device(s). missing in the entire apartment, 3rd story at north
Issued 29 Jun 2025Notice sent out 6 Jul 2025Fire and safety equipment§ 27-2046.1
Trace and repair the source and abate the visible mold condition... approx. 15 sq ft at west wall in the 1st room from east, 3rd story at north
Issued 26 Mar 2023Defect letter issued 1 Jul 2025Mold and damp§ 27-2017.3
Properly repair the broken or defective light switch at east wall in the kitchen, 3rd story at north
Issued 26 Mar 2023Invalid certification 2 May 2023Walls and ceilings§ 27-2005
Properly repair the broken or defective counter balance at lower sash window in the kitchen, 3rd story at north
Issued 26 Mar 2023Invalid certification 2 May 2023Doors and windows§ 27-2005
Repair the broken or defective plastered surfaces and paint in a uniform color at ceiling in the 1st room from east, 3rd story at north
Issued 26 Mar 2023Invalid certification 2 May 2023Walls and ceilings§ 27-2005
Repair the broken or defective plastered surfaces and paint in a uniform color at all walls in the 1st room from east, 3rd story at north
Issued 26 Mar 2023Invalid certification 2 May 2023Walls and ceilings§ 27-2005
Properly repair the broken or defective light fixture at ceiling in the 2nd room from east, 3rd story at north
Issued 26 Mar 2023Invalid certification 2 May 2023Walls and ceilings§ 27-2005
Properly repair the broken or defective lower sash window in the 2nd room from east, 3rd story at north
Issued 26 Mar 2023Invalid certification 2 May 2023Doors and windows§ 27-2005
Repair or replace the carbon monoxide detecting device(s). defective, 3rd story at north
Issued 3 Jul 2019Notice certified late 26 Aug 2019Fire and safety equipment§ 27-2046.1
Show all 14Show fewer
Repair or replace the smoke detector defective, 3rd story at north
Issued 3 Jul 2019Notice certified late 26 Aug 2019Fire and safety equipment§ 27-2045
Repair or replace the smoke detector defective in the entire apartment, 3rd story at north
Issued 10 Apr 2019Invalid certification 1 May 2019Fire and safety equipment§ 27-2045
Repair or replace the carbon monoxide detecting device(s). defective in the entire apartment, 3rd story at north
Issued 10 Apr 2019Invalid certification 1 May 2019Fire and safety equipment§ 27-2046.1
Repair the broken or defective plastered surfaces and paint in a uniform color the west wall in the bathroom, 3rd story at north
Issued 14 Feb 2019False certification 19 May 2019Walls and ceilings§ 27-2005
Non-hazardous2 open
Class A. The least serious band: chipped plaster, a missing cabinet, a peeling ceiling in a hallway. The owner has 90 days to correct it.
Properly repair with similar material the broken or defective vinyl floor tiles in the 4th room from east at north, 3rd story at north
Issued 3 Jul 2019Notice sent out 7 Jul 2019Floors and stairs§ 27-2005
Properly repair with similar material the broken or defective vinyl floor tiles in the 4th room from east at south, 3rd story at north
Issued 14 Feb 2019False certification 5 Jul 2019Floors and stairs§ 27-2005
Paperwork and notices8 open
The owner failed to file something the city requires, most often the annual property registration or the annual bedbug report. Real violations, and they say something about an owner, but not a condition anyone is living in. Kept out of the count at the top of this page for that reason.
×3File 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.
3 issued 10 Apr 2024 to 5 May 2026Notice sent outPaperwork and notices
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
Issued 3 Jul 2019Notice sent out 7 Jul 2019Paperwork and notices§ 26-1103
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
Issued 3 Jul 2019Notice sent out 7 Jul 2019Paperwork and notices§ 27-2005
Post a proper notice of smoke detector requirements, in a form approved by the commissioner, at or near the mail box, at public hall, 1st story
Issued 3 Jul 2019Notice sent out 7 Jul 2019Paperwork and notices§ 27-2045
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
Issued 3 Jul 2019Notice sent out 7 Jul 2019Paperwork and notices§ 27-2046.1
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
Issued 3 Jul 2019Notice sent out 7 Jul 2019Paperwork and notices§ 27-2104
20 closed violations, plus 15 closed paperwork filingsShow fewer
Closed means HPD recorded the violation as corrected, or dismissed it. Both appear here, because the difference matters and only HPD’s own status line says which it was.
Install the missing or repair/replace the defective window guard(s) throughout the public areas in accordance with the specifications of the new york city health code section 24 rcny chapter 12. at public hall stairs
Issued 6 Nov 2019Violation closed 8 Feb 2020Fire and safety equipment§ 27-2043.1
Install the missing or repair/replace the defective window guard(s) in accordance with the specifications of the new york city health code section 24 rcny chapter 12. wg to install = 3; wg to replace = 0; wg to repair = 0; in the entire apartment, 3rd story at north
Issued 4 Sept 2019Violation dismissed 8 Dec 2019Fire and safety equipment§ 27-2043.1
Repair or replace the carbon monoxide detecting device(s). defective in the entire apartment, 3rd story at north
Issued 4 Sept 2019Violation dismissed 1 Dec 2019Fire and safety equipment§ 27-2046.1
Arrange and make self-closing the doors, in the entrance, 3rd story at north
Issued 4 Sept 2019Violation dismissed 1 Dec 2019Fire and safety equipment§ 27-2005 +1
Repair or replace the smoke detector defective in the entire apartment, 3rd story at north
Issued 4 Sept 2019Violation dismissed 1 Dec 2019Fire and safety equipment§ 27-2045
File plans and application and legalize the following alteration or restore to the legal condition existing prior to the making of said alteration..suspended acoustical ceiling in the bathroom, 3rd story
Issued 17 May 2019Violation closed 6 Nov 2019Walls and ceilings§ 300
Abate the infestation consisting of roaches in the entire apartment, 3rd story at north
Issued 3 Jul 2019Violation closed 4 Sept 2019Pests§ 27-2017.4
Arrange and make self-closing the doors at west entrance, 3rd story
Issued 17 May 2019Violation dismissed 25 Aug 2019Fire and safety equipment§ 27-2005 +1
Abate the infestation consisting of mice in the entire apartment, 3rd story at north
Issued 10 Apr 2019Violation closed 19 May 2019Pests§ 27-2017.4
Replace the broken or defective radiator valve in the 4th room from east at south, 3rd story at north
Issued 14 Feb 2019Violation closed 19 May 2019Heat and hot water§ 27-2026
Provide a safe and adequate supply of electric service to the fixtures at ceiling in the bathroom, 3rd story at north
Issued 14 Feb 2019Violation closed 19 May 2019Electrical§ 27-2037
Properly repair the source and abate the evidence of a water leak from ceiling in the bathroom, 3rd story at north
Issued 14 Feb 2019Violation closed 19 May 2019Leaks and plumbing§ 27-2026
Provide a safe and adequate supply of electric service to the fixtures at ceiling in the 2nd room from east at south, 3rd story at north
Issued 14 Feb 2019Violation closed 19 May 2019Electrical§ 27-2037
Replace with new the broken or defective window glass at upper window sash in the 4th room from east at north, 3rd story at north
Issued 14 Feb 2019Violation closed 19 May 2019Doors and windows§ 27-2005
Abate the nuisance consisting of bedbugs, 3rd story at west
Issued 1 Oct 2016Violation dismissed 18 Jan 2017Pests§ 27-2018
Properly repair the broken or defective mortise lock and assembly, 3rd story at west
Issued 1 Oct 2016Violation dismissed 18 Jan 2017§ 27-2005
Trace and repair the source and abate the nuisance consisting of mold... at west wall approx 6 sq ft in the bathroom, 3rd story at west
Issued 1 Oct 2016Violation dismissed 18 Jan 2017Mold and damp§ 27-2005
Repair the broken or defective plastered surfaces and paint in a uniform color the ceiling and all walls in the 4th room from north at west, 3rd story at west
Issued 1 Oct 2016Violation dismissed 18 Jan 2017Walls and ceilings§ 27-2005
Abate the nuisance consisting of mice, 3rd story at west
Issued 1 Oct 2016Violation dismissed 18 Jan 2017Pests§ 27-2018
Abate the nuisance consisting of roaches, 3rd story at west
Issued 1 Oct 2016Violation dismissed 18 Jan 2017Pests§ 27-2018
63 violations on record in total, 28 of them open. The count at the top of this page counts habitability violations only.
Complaints to the city
Public complaintComplaints are reports made to the city. They are not confirmed findings. They come from HPD and from 311, and the same problem can appear more than once if more than one neighbour called.
No complaints from this building in the last three years. Worth knowing what that does and does not mean: tenants who expect nothing to happen often stop calling.
Court records
Court recordHousing Court cases
Cases the city’s housing department (HPD) brought against the owner, usually to force repairs or restore heat. A case is an allegation; where the court recorded an outcome, it is shown.
2 cases, all closed.
Tenant Action/Harassment
Opened 7 Feb 2019
Heat and Hot Water
Opened 21 Apr 2009
Evictions
Residential evictions carried out by a city marshal since 2017. Most follow a case for unpaid rent, so a count here is not by itself a finding about the building or the landlord. We show how many, never which apartment.
No marshal evictions recorded at this building since 2017.
Filings
Public filingBuilding permits
No DOB permits filed for this building in the last five years.
Annual bedbug report
Every multiple dwelling in New York must file this once a year. A report of zero infested units is good news. No report is not: failing to file is itself a violation.
- 2023No infested units reported (2021 report)
Ownership and management
Public filingAssociations come from registration records and may be incomplete. Owners register with HPD once a year, so a change of hands can go unrecorded for a full cycle.
Owner of record
JUSTINA RODRIGUEZ
Public records list JUSTINA RODRIGUEZ as the owner of record for this address as of 7 Aug 2025. Source: HPD registration.
Wrong company, wrong date, or a change that is not reflected here? Report a correction.
What to ask at the viewing
519 Knickerbocker Avenue, Brooklyn, NY 11237
Drawn from this building’s record above. They are questions, not conclusions: the point is to find out, in the twenty minutes you get inside, what the public record cannot tell you.
- The city currently has 4 open immediately-hazardous violations on this building. Ask which apartments they concern, how many are in the one you would be renting, and when HPD re-inspects.
- There is 1 open mould violation on record. Ask to look behind furniture and under sinks, and ask what was done the last time; a repaint is not a repair.
- The owner has filed a bedbug report for this building (most recently for the year ending 2023). Ask when the building was last treated, how often an exterminator comes, and whether treatment covers the whole line of apartments or only the one that complained.
- Leaks and plumbing come up on this building's record. Ask which apartments were affected and whether the cause was ever found: 0 complaints in the last twelve months.
- Ask what the deposit is, exactly what can be deducted from it, and how and when it comes back.
- Ask who to call when something breaks, what happens after hours and at weekends, and how long a repair normally takes.
Ask for anything that matters in writing; an email after the viewing is enough. We are not your lawyer and this is not legal advice.
Questions about this building
Yes. HPD lists 20 open housing violations: 4 immediately hazardous, 14 hazardous and 2 non-hazardous. Paperwork filings, such as a late registration, are not counted.
Since 2022, HPD inspectors have written the most violations here for walls and ceilings (4), doors and windows (3) and fire and safety equipment (2).
On 29 Jun 2025. HPD only publishes inspections that found something, so a later visit that found nothing would not show here.
The owner registered at least one rent-stabilized apartment here with the state for 2024. The list does not say which apartments. A tenant can ask the state for an apartment's rent history to be sure.
No heat or hot-water complaints or violations were recorded here in the 2025–26 heat season.
No residential evictions by a city marshal are recorded here since 2017.
Not yet. Reviews come from people who lived here, and none has been published for this building.
BBL 3033260009 · Block 3326, Lot 9 · Building class S5