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720 Knickerbocker Avenue

Brooklyn, NY 11221BBL 3-03391-0031Map

Owner of record: Stonemountain Equities LLC

720 Knickerbocker Avenue is a walk-up apartment building built in 1910 in Brooklyn, 11221. It has 8 residential units across 3 floors. The owner of record is Stonemountain Equities LLC. HPD has recorded 220 housing violations here, most recently on June 3, 2026. 20 of the 50 most recent violations are still open. City tax records listed 8 rent-stabilized apartments here in 2024.

HPD violations
220
DOB violations
0
ECB violations
2
HPD complaints
217

What to know

Concern
2 open Class C

Immediately hazardous issues among recent violations are still open.

Good
Last violation Jun 3, 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
8
About 100% 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 · 220

  • A

    Repair the broken or defective plastered surfaces and paint in a uniform color at ceiling and north wall in the 1st room from north located at apt 5, 2nd story, 1st apartment from east at south

    Jun 3, 2026 · Apt 5

    Open — Invalid certification
  • A

    Repair the broken or defective plastered surfaces and paint in a uniform color at window casing in the 4th room from north at west located at apt 5, 2nd story, 1st apartment from east at south

    Jun 3, 2026 · Apt 5

    Open — Invalid certification
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color at ceiling in the 3rd room from north located at apt 8, 3rd story, 1st apartment from east at south

    Sep 15, 2025 · Apt 8

    Open — Nov sent out
  • B

    Repair the roof so that it will not leak at the ceiling in the 3rd room from north located at apt 8, 3rd story, 1st apartment from east at south

    Sep 15, 2025 · Apt 8

    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 defective in the entire apartment located at apt 8, 3rd story, 1st apartment from east at south

    Sep 15, 2025 · Apt 8

    Open — Nov sent out
  • B

    Repair, replace or provide an approved and operational carbon monoxide detecting device, installed in accordance with applicable law and rules defective in the entire apartment located at apt 8, 3rd story, 1st apartment from east at south

    Sep 15, 2025 · Apt 8

    Open — Nov sent out
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color at ceiling in the private hallway from north located at apt 8, 3rd story, 1st apartment from east at south

    Sep 15, 2025 · Apt 8

    Open — Nov sent out
  • B

    Repair the roof so that it will not leak at ceiling in the private hallway from north located at apt 8, 3rd story, 1st apartment from east at south

    Sep 15, 2025 · Apt 8

    Open — Nov sent out
  • B

    Properly repair the source and abate the evidence of a water leak at northwest wall in the kitchenette located at apt 5, 2nd story, 1st apartment from east at south

    Apr 3, 2025 · Apt 5

    Open — Nov sent out
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color at northwest wall in the kitchenette located at apt 5, 2nd story, 1st apartment from east at south

    Apr 3, 2025 · Apt 5

    Open — Nov sent out
Show 40 more ↓
  • A

    § 329, m/d law and dept. rules and regs. provide a completed certificate of inspection visits in a proper frame at or near mailboxes, bottom edge of frame between 48-62 inches above floor missing at public hall, 1st story

    Apr 3, 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 missing at public hall, 1st story

    Apr 3, 2025

    Open — Nov sent out
  • C

    Abate the infestation consisting of roaches in the entire apartment located at apt 5, 2nd story, 1st apartment from east at south

    Dec 22, 2024 · Apt 5

    Open — Defect letter issued
  • B

    Properly repair the source and abate the evidence of a water leak upper window recess at south wall in the 4th room from north located at apt 5, 2nd story, 1st apartment from east at south

    Dec 22, 2024 · Apt 5

    Open — False certification
  • B

    Properly repair the source and abate the evidence of a water leak at ceiling , north walls in the 1st room from north located at apt 5, 2nd story, 1st apartment from east at south

    Dec 22, 2024 · Apt 5

    Closed — Violation closed
  • A

    Paint with light colored paint to the satisfaction of this department the north wall in the 1st room from north located at apt 5, 2nd story, 1st apartment from east at south

    Dec 22, 2024 · Apt 5

    Open — Nov sent out
  • B

    Properly repair or replace the broken or defective counter balance lower window sash at east wall in the private hallway located at apt 5, 2nd story, 1st apartment from west at north

    Oct 9, 2024 · Apt 5

    Open — Nov sent out
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color at south wall in the 4th room from north located at apt 5, 2nd story, 1st apartment from west at north

    Oct 9, 2024 · Apt 5

    Open — Nov sent out
  • B

    Properly repair the source and abate the evidence of a water leak at ceiling in the 1st room from north located at apt 5, 2nd story, 1st apartment from west at north

    Oct 9, 2024 · Apt 5

    Open — Nov sent out
  • 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
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color the ceiling in the 2nd room from north located at apt 2, 1st story, apartment at west

    Jul 24, 2019 · Apt 2

    Open — Nov sent out
  • B

    Abate the infestation consisting of vermin ants in the entire apartment located at apt 2, 1st story, apartment at west

    Jul 24, 2019 · Apt 2

    Open — Nov sent out
  • B

    Abate the infestation consisting of vermin flies in the entire apartment located at apt 2, 1st story, apartment at west

    Jul 24, 2019 · Apt 2

    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

    Jun 4, 2019

    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. at public hall, 1st story

    Jun 4, 2019

    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 missing at public hall, 1st story

    Jun 4, 2019

    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. at public hall, 1st story

    Jun 4, 2019

    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

    Jun 4, 2019

    Closed — Violation dismissed
  • A

    § 329, m/d law and dept. rules and regs. provide a completed certificate of inspection visits in a proper frame at or near mailboxes, bottom edge of frame between 48-62 inches above floor missing at public hall, 1st story

    Jun 4, 2019

    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 4, 2019

    Closed — Violation dismissed
  • B

    Discontinue use of rooms for living, disconnect plumbing fixtures and properly seal pipe connections bathroom (water closet and wash basin) at cellar duplex used for living inconjunction with apt #1 located at apt 1, 1st story, 1st apartment from south at west

    Jun 4, 2019 · Apt 1

    Closed — Violation dismissed
  • B

    Repair the broken or defective plastered surfaces and paint in a uniform color the south wall located at apt 1 lower level, 1st story, 1st apartment from south at west

    Jun 4, 2019 · Apt 1

    Closed — Violation dismissed
  • B

    Properly repair the source and abate the evidence of a water leak at south wall located at apt 1 lower level, 1st story, 1st apartment from south at west

    Jun 4, 2019 · Apt 1

    Closed — Violation dismissed
  • A

    Trace and repair the source and abate the visible mold condition... at south wall (approx. 4 sq ft) located at apt 1 lower level, 1st story, 1st apartment from south at west

    Jun 4, 2019 · Apt 1

    Closed — Violation dismissed
  • C

    Replace with new the broken or defective mortise lock at entrance door to building , 1st story

    Nov 25, 2016

    Closed — Violation closed
  • B

    Provide a safe and adequate supply of electric service to the fixtures through out in the entire apartment located at apt 3, 3rd story, apartment at south

    Nov 25, 2016 · Apt 3

    Closed — Violation closed
  • B

    Repair the roof so that it will not leak at skylight at public hall, 3rd story

    Nov 25, 2016

    Closed — Violation closed
  • B

    Abate the nuisance consisting of roaches in the entire apartment located at apt 3, 3rd story, apartment at south

    Nov 25, 2016 · Apt 3

    Closed — Violation closed
  • C

    Replace with new the broken or defective entrance door to building , 1st story

    Nov 25, 2016

    Closed — Violation closed
  • B

    § 185, 240 m/d law properly fire retard in accordance with the rules and regulations of this department the cellar ceiling through out at cellar

    Nov 25, 2016

    Closed — Violation closed
  • B

    Abate the nuisance consisting of mice in the entire apartment located at apt 3, 3rd story, apartment at south

    Nov 25, 2016 · Apt 3

    Closed — Violation closed
  • C

    Provide an adequate supply of gas to the fixtures at range in the entire apartment located at apt 3, 3rd story, apartment at south

    Nov 25, 2016 · Apt 3

    Closed — Violation closed
  • C

    Provide hot water at all hot water fixtures in the entire apartment located at apt 3, 3rd story, 1st apartment from east at south

    Nov 25, 2016 · Apt 3

    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 3, 3rd story, 1st apartment from east at south

    Nov 25, 2016 · Apt 3

    Closed — Violation closed
  • 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
  • A

    Paint with light colored paint to the satisfaction of this department paint at all walls at all stories.

    Jun 27, 2016

    Closed — Violation closed
  • B

    Repair the roof so that it will not leak at ceiling at public hall, 3rd story

    Jun 27, 2016

    Closed — Violation closed
  • C

    Replace with new the missing ... 1 wood balluster at public hall stairs, 2nd story

    Jun 27, 2016

    Closed — Violation closed
  • B

    Properly repair with similar material the broken or defective wood balluster 4 steps up from bottom at public hall stairs, 1st story

    Jun 27, 2016

    Closed — Violation closed
  • B

    Properly repair with similar material the broken or defective fire retardant plaster , all walls, all stories at public hall

    Apr 8, 2016

    Closed — Violation closed

DOB building violations · 0

No DOB violations on record

ECB violations · 2

  • Class - 2

    Occupancy contrary to that allowed by c of o & dept of buildings records. partition erected creating rooms for living & sleeping @cellar. two piece bathroom present completed with water closet & wash basin

    Jun 4, 2019

    Resolve
  • Class - 1

    Occupancy contrary to that allowed by cofo and dob records 3 sty class'a' apt converted into 7 'b' rms remedy;discontinue illegal use of amended cofo

    Mar 13, 2009

    Resolve

Complaints

  • Water leak

    Heavy flow

    May 20, 2026 · Apt 5

    Close
  • Electric

    Lighting

    May 20, 2026 · Apt 5

    Close
  • Safety

    Smoke detector

    Aug 28, 2025 · Apt 8

    Close
  • Water leak

    Damp spot

    Aug 28, 2025 · Apt 8

    Close
  • Water leak

    Damp spot

    Aug 20, 2025 · Apt 8

    Close
  • Unsanitary condition

    Pests

    Nov 15, 2024 · Apt 5

    Close
  • Paint/plaster

    Wall

    Nov 15, 2024 · Apt 5

    Close
  • Unsanitary condition

    Mold

    Nov 15, 2024 · Apt 5

    Close
  • Water leak

    Heavy flow

    Nov 15, 2024 · Apt 5

    Close
  • Water leak

    Heavy flow

    Nov 15, 2024 · Apt 5

    Close
Show 40 more ↓
  • Safety

    Fire escape

    Oct 2, 2024 · Apt 5

    Close
  • Unsanitary condition

    Mold

    Oct 2, 2024 · Apt 5

    Close
  • Water leak

    Heavy flow

    Oct 2, 2024 · Apt 5

    Close
  • Heat/hot water

    Apartment only

    Feb 1, 2024 · Apt 1

    Close
  • Appliance

    Refrigerator

    Jan 17, 2024 · Apt 8

    Close
  • Heat/hot water

    Apartment only

    Dec 19, 2020 · Apt 52NDFL

    Close
  • Electric

    Power outage

    Dec 19, 2020 · Apt 52NDFL

    Close
  • Unsanitary condition

    Pests

    Jul 19, 2019 · Apt 2

    Close
  • Water leak

    Slow leak

    Jul 19, 2019 · Apt 2

    Close
  • Unsanitary condition

    Pests

    Jul 19, 2019 · Apt 2

    Close
  • Unsanitary condition

    Mold

    Jun 1, 2019 · Apt 1

    Close
  • Water leak

    Slow leak

    Jun 1, 2019 · Apt 1

    Close
  • Electric

    Power outage

    May 18, 2016 · Apt 3F

    Close
  • Heating

    Heat related

    Jan 26, 2014 · Apt 3F

    Close
  • Electric

    Electric-supply

    Jul 18, 2013 · Apt 3F

    Close
  • Plumbing

    Water supply

    Feb 20, 2013 · Apt 3F

    Close
  • Plumbing

    Toilet

    Jun 13, 2012 · Apt 2F

    Close
  • Appliance

    Refrigerator

    Jun 13, 2012 · Apt 2F

    Close
  • Heating

    Heat related

    Mar 7, 2012 · Apt 2F

    Close
  • Plumbing

    Toilet

    Mar 7, 2012 · Apt 2F

    Close
  • Paint/plaster

    Wall

    Mar 7, 2012 · Apt 2F

    Close
  • Plumbing

    Basin/sink

    Mar 7, 2012 · Apt 2F

    Close
  • Nonconst

    Vermin

    Feb 10, 2012 · Apt 2F

    Close
  • Paint/plaster

    Wall

    Feb 10, 2012 · Apt 2F

    Close
  • Heating

    Heat related

    Jan 6, 2012 · Apt 3F

    Close
  • Paint/plaster

    Wall

    Jan 4, 2012 · Apt 2F

    Close
  • Heating

    Heat related

    Jan 4, 2012 · Apt 2F

    Close
  • Paint/plaster

    Wall

    Jul 27, 2011 · Apt 2F

    Close
  • Appliance

    Electric/gas range

    Jul 27, 2011 · Apt 2F

    Close
  • Paint/plaster

    Wall

    Jul 27, 2011 · Apt 2F

    Close
  • Nonconst

    Vermin

    Jul 27, 2011 · Apt 2F

    Close
  • Plumbing

    Toilet

    Jul 27, 2011 · Apt 2F

    Close
  • Electric

    Wiring

    Jul 27, 2011 · Apt 2F

    Close
  • Paint/plaster

    Wall

    Jul 27, 2011 · Apt 2F

    Close
  • Appliance

    Refrigerator

    Jul 27, 2011 · Apt 2F

    Close
  • Plumbing

    Water supply

    Dec 30, 2010 · Apt 2F

    Close
  • General

    Ceramic-tile

    Dec 27, 2010 · Apt 2F

    Close
  • Plumbing

    Toilet

    Dec 27, 2010 · Apt 2F

    Close
  • Plumbing

    Toilet

    Dec 27, 2010 · Apt 2F

    Close
  • Plumbing

    Basin/sink

    Dec 27, 2010 · Apt 2F

    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
1910
Floors
3
Residential units
8
Building area
5,412 ft²
Lot area
2,600 ft²
Zoning
R6
Community board
304
Council district
37
Block / lot
3391 / 31
Assessed value
$670,050
Landmark / historic district
No

HPD registration #331309, last renewed Jul 23, 2026.

Questions about 720 Knickerbocker Avenue

Who owns 720 Knickerbocker Avenue?

The owner of record in NYC Department of City Planning PLUTO data is Stonemountain Equities LLC.

Does 720 Knickerbocker Avenue have violations?

Yes. NYC HPD has recorded 220 housing violations at this property.

Is 720 Knickerbocker Avenue rent stabilized?

NYC Department of Finance tax bills listed 8 rent-stabilized units here in 2024 (about 100% of its 8 apartments). To confirm a specific apartment, request its rent history from NYS Homes and Community Renewal.

When was 720 Knickerbocker Avenue built?

City records list 1910 as the year it was built.

How many apartments are in 720 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.