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
Immediately hazardous issues among recent violations are still open.
Date of the most recent HPD inspection that found a problem.
No balance due on recent ECB violations.
Rent stabilization
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.
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
- ANon-hazardous
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 - ANon-hazardous
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 - BHazardous
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 - BHazardous
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 - BHazardous
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 - BHazardous
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 - BHazardous
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 - BHazardous
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 - BHazardous
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 - BHazardous
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 ↓
- ANon-hazardous
§ 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 - 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 missing at public hall, 1st story
Apr 3, 2025
Open — Nov sent out - CImmediately hazardous
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 - BHazardous
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 - BHazardous
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 - ANon-hazardous
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 - BHazardous
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 - BHazardous
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 - BHazardous
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 - 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 - BHazardous
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 - BHazardous
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 - BHazardous
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 - 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
Jun 4, 2019
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. at public hall, 1st story
Jun 4, 2019
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 missing at public hall, 1st story
Jun 4, 2019
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. at public hall, 1st story
Jun 4, 2019
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
Jun 4, 2019
Closed — Violation dismissed - ANon-hazardous
§ 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 - 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 4, 2019
Closed — Violation dismissed - BHazardous
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 - BHazardous
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 - BHazardous
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 - ANon-hazardous
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 - CImmediately hazardous
Replace with new the broken or defective mortise lock at entrance door to building , 1st story
Nov 25, 2016
Closed — Violation closed - BHazardous
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 - BHazardous
Repair the roof so that it will not leak at skylight at public hall, 3rd story
Nov 25, 2016
Closed — Violation closed - BHazardous
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 - CImmediately hazardous
Replace with new the broken or defective entrance door to building , 1st story
Nov 25, 2016
Closed — Violation closed - BHazardous
§ 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 - BHazardous
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 - CImmediately hazardous
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 - CImmediately hazardous
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 - 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 east at south
Nov 25, 2016 · Apt 3
Closed — Violation closed - 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 - ANon-hazardous
Paint with light colored paint to the satisfaction of this department paint at all walls at all stories.
Jun 27, 2016
Closed — Violation closed - BHazardous
Repair the roof so that it will not leak at ceiling at public hall, 3rd story
Jun 27, 2016
Closed — Violation closed - CImmediately hazardous
Replace with new the missing ... 1 wood balluster at public hall stairs, 2nd story
Jun 27, 2016
Closed — Violation closed - BHazardous
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 - BHazardous
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
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.