509 Throop Avenue
Brooklyn, NY 11221BBL 3-01831-0008Map
Owner of record: 509 Throop Partners LLC
509 Throop Avenue is a walk-up apartment building built in 1905 in Brooklyn, 11221. It has 4 residential units across 4 floors. The owner of record is 509 Throop Partners LLC. HPD has recorded 4 housing violations here, most recently on May 6, 2026. 1 of the 4 most recent violations are still open.
- HPD violations
- 4
- DOB violations
- 0
- ECB violations
- 2
- HPD complaints
- 4
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 · 4
- 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.
May 6, 2026
Open — Nov sent out - 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 20, 2025
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 12, 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
DOB building violations · 0
No DOB violations on record
ECB violations · 2
- Class - 2
Failure to maintain building in a code-compliant manner. at the time of inspection, i observed inadequate fire stopping in the boiler room corners next to the light fixture and under the soffit rear corner. boi
Jul 7, 2025
Resolve - Class - 2
Ecb nov issued for failure to maintain. atoi observed missing fire stopping at boiler room wall and ceiling intersection at gas pipe penetration. also boiler room door is not self closing and latching., repair
Mar 5, 2025
Resolve
Complaints
- Heat/hot water
Entire building
Jan 31, 2026 · Apt BLDG
Close - Unsanitary condition
Garbage/recycling storage
Feb 21, 2025 · Apt BLDG
Close - Plumbing
Water supply
Feb 21, 2025 · Apt BLDG
Close - Heat/hot water
Entire building
Feb 19, 2025 · Apt BLDG
Close
Sales history
No recorded sales in our data
Building details
- Building type
- Walk-up apartment building (C3)
- Year built
- 1905
- Floors
- 4
- Residential units
- 4
- Building area
- 4,800 ft²
- Lot area
- 1,800 ft²
- Zoning
- R6B
- Community board
- 303
- Council district
- 36
- Block / lot
- 1831 / 8
- Assessed value
- $612,000
- Landmark / historic district
- No
HPD registration #335678, last renewed Oct 31, 2024.
Questions about 509 Throop Avenue
Who owns 509 Throop Avenue?
The owner of record in NYC Department of City Planning PLUTO data is 509 Throop Partners LLC.
Does 509 Throop Avenue have violations?
Yes. NYC HPD has recorded 4 housing violations at this property.
Is 509 Throop 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 509 Throop Avenue built?
City records list 1905 as the year it was built.
How many apartments are in 509 Throop Avenue?
It has 4 residential units.
Source: NYC Open Data (DCP PLUTO, HPD, DOB, ECB/OATH, DOF). Records can lag the city's systems. Data refreshed weekly.