Building record from city data · BROOKLYN, NY

423 Throop Ave

Printed 2026-10-21 from blueflo.tech/b/423-throop-avenue-brooklyn, where it is kept current. These are city records, not an inspection by Blueflo. Every item shows its source and the date it was last checked. Not a warranty. May not be used for tenant screening (terms of use).

built 1931 · 3 stories · 6 apartments · BIN 3050769 · BBL 3018060006

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
Source: Housing Maintenance Code Violations · as of 2026-10-19
Worth knowing
Also on record
Clean in the records
Registered with the city

MHANY MANAGMENT, INC., NEIGHBORHOOD RESTORE HDFC, THROOP INVESTORS ONE LLC

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
Source: Housing Maintenance Code Violations · as of 2026-10-19

Apartments named in these records

City records name 7 apartment labels, more than the 6 apartments the city lists for this building, so some are likely the same apartment written differently.

These are city records about an apartment, not about anyone who lives or lived there. They may not be used to screen a tenant.

Heat and hot water

Issues on record
Boiler inspection filings

Latest accepted inspection Aug 2020, defects reported: yes

DOB NOW: Safety Boiler, as of 2026-10-19 · See the boiler filings at DOB →
What this counts

Accepted annual boiler inspection filings, any date

  • Heat sourceno recordNo boiler registration or district steam on record
  • Boiler work permitsno recordNo boiler work permits on record
  • Heat and hot water complaintsfound0 heat or hot water complaints

Water and pipes

Issues on record, most recently 2023

Pests and cleanliness

Older records on file

Fire and safety

Issues on record, most recently 2023

Structure and facade

Issues on record, most recently 2023

Flooding

No issues on record
FEMA flood zone

Outside FEMA's 1% annual-chance flood zone: X

FEMA National Flood Hazard Layer, as of 2026-10-20
What this counts

Effective FIRM zones touching the building footprint

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
What this counts

Mapped ponding touching the building footprint

  • Basementno recordUnknown

Rent and tenancy

On the state list
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
What this counts

The list doesn't say which apartments are stabilized, and being listed isn't proof of current status. For a specific apartment, request its rent history from HCR

Gas

Gas piping

Open violation for not filing the periodic gas piping inspection (2026)

DOB Safety Violations, as of 2026-10-19
What this counts

Paperwork violation: the filing is missing, which is not a finding about the pipes

General condition and all records

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 · Read these violations in full at HPD Online →
What this counts

Open HPD violations inspected in the last 10 years; class C = immediately hazardous. Paperwork = failure to file, notify or certify

Permit history

8 permits since 1990

DOB NOW: Build – Approved Permits, as of 2026-10-19 · See every permit at DOB →
What this counts

DOB permits issued (DOB NOW and legacy BIS), one per job and work type; excludes sheds

  • Resident complaints to the cityfoundno complaints. None in the last 2 years, but 9 earlier complaints on record from 2023–2024

Nothing on record

Energyno record
  • Energynot requiredNot required: energy reporting applies to buildings over 25,000 sq ft
ElevatorsNot applicable
  • Elevatorsnot requiredNo elevators registered to this building

Sources

23 datasets

Each date is when we last checked that dataset, not when the record itself was created.