# 423 Throop Ave, Brooklyn

What New York City's public records say about this building. Page: https://blueflo.tech/b/423-throop-avenue-brooklyn

> These are city records, not an inspection by Blueflo. Every item shows its source and the date it was last checked.

## In one line

30 open immediately hazardous (class C) HPD violations about heat or hot water and walls, floors and stairs and electrical and gas and fire safety and doors and windows and leaks (Housing Maintenance Code Violations, as of 2026-10-19)

## The building

- **Year built:** 1931 (PLUTO (tax lot data), as of 2026-08-24)
- **Stories:** 3 (Buildings Subject to HPD Jurisdiction, as of 2026-08-12)
- **Homes:** 6 (Buildings Subject to HPD Jurisdiction, as of 2026-08-12)

## Worth knowing

- 30 open immediately hazardous (class C) HPD violations about heat or hot water and walls, floors and stairs and electrical and gas and fire safety and doors and windows and leaks
- 2 open major (class 2) building code violations from 2017–2021
- 75 open HPD violations about building conditions

## Also on record

- On the state's list of buildings with rent-stabilized apartments (2024 registrations)

## Clean in the records

- Water service line on record as non-lead (records) (Lead Service Line Location Coordinates, as of 2026-01-30)
- Outside FEMA's 1% annual-chance flood zone; no mapped stormwater flooding (FEMA National Flood Hazard Layer, as of 2026-10-20)
- No heat or hot water complaints filed last winter (Housing Maintenance Code Complaints and Problems, as of 2026-10-20)

## Building systems

- **Boiler inspection filings:** Latest accepted inspection Aug 2020, defects reported: yes (DOB NOW: Safety Boiler, as of 2026-10-19)
- **Facade rating:** Not required: facade inspections apply only to buildings taller than 6 stories (DOB NOW: Safety – Facades Compliance Filings, as of 2026-10-19)
- **Water service line:** Non-Lead (records) (Lead Service Line Location Coordinates, as of 2026-01-30)
- **FEMA flood zone:** Outside FEMA's 1% annual-chance flood zone: X (FEMA National Flood Hazard Layer, as of 2026-10-20)
- **Stormwater flooding:** Extreme storm, 2080 sea levels: Not in mapped flooding; Moderate storm, 2050 sea levels: Not in mapped flooding; Moderate storm, today's sea levels: Not in mapped flooding; Limited storm, today's sea levels: Not loaded (file format unreadable) (NYC Stormwater Flood Maps, as of 2024-07-03)
- **Basement:** Unknown (PLUTO (tax lot data), as of 2026-08-24)

## Violations and complaints

- **HPD violations:** 75 open: 75 about building conditions — walls, floors and stairs (15), smoke or CO detectors (12), electrical (9), heat or hot water (8); 30 immediately hazardous (class C). Also 102 older records from 2000–2015 never closed. 4 further violations from 2023–2026 were closed. 276 violations on record in all, 1983–2026 — the 181 most recent are listed here (Housing Maintenance Code Violations, as of 2026-10-19)
- **DOB violations:** 42 open: 9 about building conditions, 19 about filings or paperwork, 14 older than 10 years (DOB Violations, as of 2026-10-19)
- **Heat and hot water complaints:** 0 heat or hot water complaints (Housing Maintenance Code Complaints and Problems, as of 2026-10-20)
- **Resident complaints to the city:** no complaints. None in the last 2 years, but 9 earlier complaints on record from 2023–2024 (Housing Maintenance Code Complaints and Problems, as of 2026-10-20)

## More systems

- **Rent stabilization:** On the state's list of buildings with at least one rent-stabilized apartment (2024 registrations) (Rent Stabilized Building Lists (2024 HCR registrations), as of 2025-11-30)
- **Heat source:** No boiler registration or district steam on record (Clean Air Tracking System (boiler registrations), as of 2026-10-20)
- **Boiler work permits:** No boiler work permits on record (DOB Permit Issuance (BIS), as of 2026-10-19)
- **Elevators:** No elevators registered to this building (DOB NOW Elevator Safety Compliance, as of 2026-10-19)
- **Gas piping:** Open violation for not filing the periodic gas piping inspection (2026) (DOB Safety Violations, as of 2026-10-19)
- **Energy:** Not required: energy reporting applies to buildings over 25,000 sq ft (Energy and Water Data Disclosure (Local Law 84), as of 2025-11-25)

## Permits and work

- **Permit history:** 8 permits since 1990 (DOB NOW: Build – Approved Permits, as of 2026-10-19)
- **Sidewalk shed and scaffolding:** No sidewalk shed permits on record (DOB NOW: Build – Approved Permits, as of 2026-10-19)
- **Landmark status:** Not in a historic district on record (PLUTO (tax lot data), as of 2026-08-24)

## By apartment

7 of 6 apartments named in a city record:

- Apt 1R1: https://blueflo.tech/b/423-throop-avenue-brooklyn/unit/1r1
- Apt 2: https://blueflo.tech/b/423-throop-avenue-brooklyn/unit/2
- Apt 2L: https://blueflo.tech/b/423-throop-avenue-brooklyn/unit/2l
- Apt 3: https://blueflo.tech/b/423-throop-avenue-brooklyn/unit/3
- Apt 3L: https://blueflo.tech/b/423-throop-avenue-brooklyn/unit/3l
- Apt 3R: https://blueflo.tech/b/423-throop-avenue-brooklyn/unit/3r
- Apt 5: https://blueflo.tech/b/423-throop-avenue-brooklyn/unit/5

## Registered with the city

- MHANY MANAGMENT, INC. (Agent, Registration Contacts)
- NEIGHBORHOOD RESTORE HDFC (CorporateOwner, Registration Contacts)
- THROOP INVESTORS ONE LLC (TaxLotOwner, PLUTO (tax lot data))

## More

- Every record behind this card: https://blueflo.tech/b/423-throop-avenue-brooklyn/records
- The same card as JSON: https://blueflo.tech/v1/buildings/423-throop-avenue-brooklyn
- Ask about any building from an assistant (MCP): https://blueflo.tech/mcp
- Report something wrong: https://blueflo.tech/dispute?slug=423-throop-avenue-brooklyn
- How to use this data: https://blueflo.tech/llms.txt