734 Leonard Street
Brooklyn, NY 11222BBL 3-02575-0052Map
Owner of record: Koros, Adam
734 Leonard Street is a walk-up apartment building built in 1928 in Brooklyn, 11222. It has 8 residential units across 4 floors. The owner of record is Koros, Adam. HPD has recorded 10 housing violations here, most recently on June 10, 2025. City tax records listed 3 rent-stabilized apartments here in 2024.
- HPD violations
- 10
- DOB violations
- 3
- ECB violations
- 0
- HPD complaints
- 19
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
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 · 10
- 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 - 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 27, 2024
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 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 - CImmediately hazardous
Replace or repair the self-closing the doors that is missing or defective apartment in the entrance located at apt 2r, 2nd story, 1st apartment from east at south
Mar 17, 2023 · Apt 2R
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 - 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 - 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 - 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.
Oct 9, 2015
Closed — Violation dismissed
DOB building violations · 3
- Low pressure boiler boiler required
Violation issued for failure to file annual boiler 2016 inspection report
Apr 6, 2018
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
Mar 16, 1999
Dob violation - active
ECB violations · 0
No ECB violations on record
Complaints
- Heat/hot water
Apartment only
Mar 14, 2023 · Apt 2R
Close - Heat/hot water
Apartment only
Feb 13, 2023 · Apt 2R
Close - Heat/hot water
Entire building
Nov 17, 2021 · Apt BLDG
Close - Heating
Heat related
Jan 2, 2013 · Apt NA
Close - Heating
Heat related
Nov 23, 2008 · Apt 1L
Close - Heating
Heat related
Nov 10, 2007 · Apt 1R
Close - Heating
Heat related
Nov 6, 2007 · Apt BLDG
Close - Heating
Heat related
Oct 30, 2007 · Apt BLDG
Close - General
Locks
Oct 23, 2007 · Apt BLDG
Close - Heating
Heat related
Mar 20, 2006 · Apt BLDG
Close
Show 9 more ↓
- Heating
Heat related
Mar 19, 2006 · Apt BLDG
Close - Heating
Heat related
Nov 12, 2005 · Apt BLDG
Close - Heating
Heat related
Oct 22, 2005 · Apt BDG
Close - Heating
Heat-plant
Oct 22, 2005 · Apt BDG
Close - Nonconst
Rubbish
Oct 10, 2005 · Apt 1
Close - Nonconst
Vermin
Oct 10, 2005 · Apt 1
Close - Heating
Heat related
May 6, 2005 · Apt 4L
Close - Electric
Wiring
May 6, 2005 · Apt 4L
Close - General
Floor
May 6, 2005 · Apt 4L
Close
Sales history
No recorded sales in our data
Building details
- Building type
- Walk-up apartment building (C1)
- Year built
- 1928
- Floors
- 4
- Residential units
- 8
- Building area
- 6,000 ft²
- Lot area
- 2,500 ft²
- Zoning
- R6B
- Community board
- 301
- Council district
- 33
- Block / lot
- 2575 / 52
- Assessed value
- $877,500
- Landmark / historic district
- No
HPD registration #323490, last renewed Nov 17, 2025.
Questions about 734 Leonard Street
Who owns 734 Leonard Street?
The owner of record in NYC Department of City Planning PLUTO data is Koros, Adam.
Does 734 Leonard Street have violations?
Yes. NYC HPD has recorded 10 housing violations at this property.
Is 734 Leonard Street rent stabilized?
NYC Department of Finance tax bills listed 3 rent-stabilized units here in 2024 (about 38% of its 8 apartments). To confirm a specific apartment, request its rent history from NYS Homes and Community Renewal.
When was 734 Leonard Street built?
City records list 1928 as the year it was built.
How many apartments are in 734 Leonard Street?
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.