Building health · BROOKLYN, NY

850 40 St

built 1932 · 4 stories · 36 apartments
Registered with the city: 850-40HT ST HDFC

Apartments named in these records

5 of this building’s 36 apartments are named in a city record. The rest have no record naming them, which is the usual case.

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

Structure and facade

Issues on record

Heat and hot water

1 complaint, 2024
Heat source

Boiler burning natural gas (Federal FST-60), registration expired since Feb 2023

Clean Air Tracking System (boiler registrations), as of 2026-10-20 · See this building's boiler registrations on NYC Open Data →
Boiler inspection filings

Latest accepted inspection Dec 2025, defects reported: no

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

Boiler work permits

Latest boiler work permit 1999

DOB Permit Issuance (BIS), as of 2026-10-19
What this counts

DOB boiler permits (BIS and DOB NOW); a permit dates work, not the boiler's age

  • Heat and hot water complaintsfound0 heat or hot water complaints

Water and pipes

Issues on record · 3 complaints, 2025–2026 · 2 in the past year

Pests and cleanliness

1 complaint, 2025

Fire and safety

Issues on record, most recently 2024

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

BasementWhole tax lot

Below grade

PLUTO (tax lot data), as of 2026-08-24

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

Energy

Energy

ENERGY STAR score 32 (2024 report)

Energy and Water Data Disclosure (Local Law 84), as of 2025-11-25
What this counts

Letter grades are issued by the city under Local Law 33 and posted near the building entrance; Blueflo shows the reported score only

General condition and all records

HPD violations

7 open: 7 about building conditions — walls, floors and stairs (3), fire safety (2), leaks (2); 2 immediately hazardous (class C). Also 6 older records from 1990–2009 never closed. 25 further violations from 2024–2026 were closed. 80 violations on record in all, 1990–2026 — the 39 most recent are listed here

2026 May
Other conditions class A · closed
2026 May
Fire safetyApt B5 class C · closed
2026 May
Smoke or CO detectorsApt B5 class B · closed
2026 May
Smoke or CO detectorsApt B5 class B · closed
2026 May
Walls, floors and stairsApt B5 class B · closed
2025 Nov
Other conditions class I · paperwork · closed
2025 Nov
LeaksApt B5 class B
2025 Nov
Walls, floors and stairsApt B5 class B
Show 30 more
2025 Apr
Walls, floors and stairsApt B5 class A
2025 Apr
LeaksApt B5 class A
2025 Apr
Walls, floors and stairsApt B5 class A
2025 Apr
Smoke or CO detectorsApt B5 class B · closed
2025 Apr
Smoke or CO detectorsApt B5 class B · closed
2025 Apr
Walls, floors and stairsApt B5 class B · closed
2025 Apr
LeaksApt B5 class B · closed
2024 Nov
Fire safety class C · closed
2024 Nov
Fire safetyApt C5 class C
2024 Nov
Walls, floors and stairsApt C5 class A · closed
2024 Nov
Walls, floors and stairsApt C5 class A · closed
2024 Nov
LeaksApt C5 class A · closed
2024 Nov
Doors and windowsApt C5 class A · closed
2024 Nov
Doors and windowsApt C5 class A · closed
2024 Nov
Walls, floors and stairsApt C5 class A · closed
2024 Nov
Walls, floors and stairsApt C5 class A · closed
2024 Nov
LeaksApt C5 class A · closed
2024 Nov
Walls, floors and stairsApt C5 class A · closed
2024 Nov
Walls, floors and stairsApt C5 class A · closed
2024 Nov
Doors and windows class A · closed
2024 Nov
Doors and windowsApt C7 class A · closed
2024 Nov
Fire safetyApt C7 class C · closed
2024 Apr
Pests class A · paperwork · closed
2023 Jun
Fire safetyApt B5 class C
2009 Mar
Walls, floors and stairs class A · never closed
2007 Jun
Heat or hot water class C · paperwork · never closed
2007 Jun
Doors and windowsApt D3 class C · never closed
1990 May
Heat or hot water class C · paperwork · never closed
1990 May
Fire safety class B · never closed
1990 May
Fire safetyApt D3 class B · never closed
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

Resident complaints to the city

3 leaks, 1 heat or hot water, 1 mold

Housing Maintenance Code Complaints and Problems, as of 2026-10-20 · See the complaints at HPD Online →
What this counts

HPD complaints received in the last 2 years; the list below is every complaint on record for the last three years

Permit history

4 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

  • DOB violationsfound0 open

Nothing on record

Gasno record
  • Gas pipingno recordNo open gas piping filing violations. Inspection results themselves are not published
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.

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