Building health · BROOKLYN, NY

870 42 St

built 1920 · 4 stories · 16 apartments
Registered with the city: 870 42ND STREET REALTY LLC

Apartments named in these records

7 of this building’s 16 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

Issues on record · 9 complaints, 2024–2026 · 3 in the past year
Heat source

Boiler burning natural gas (H.B. Smith 19A-S/W-09), registration current since Jul 2026

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 2009

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 complaints

10 heat or hot water complaints

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

HPD complaints, heat season 2025–26 (Oct 1–May 31)

Water and pipes

No issues on record
What has happened here
Water service line

Non-Lead (records)

Lead Service Line Location Coordinates, as of 2026-01-30

Pests and cleanliness

Issues on record, most recently 2021

Fire and safety

Older records on file

Electrical

Older records on file

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

General condition and all records

HPD violations

11 open: 8 about building conditions — fire safety (2), walls, floors and stairs (2), doors and windows (1), other conditions (1); 1 immediately hazardous (class C), 3 about paperwork or notices. Also 61 older records from 1988–2016 never closed. 21 further violations from 2023–2026 were closed. 244 violations on record in all, 1988–2026 — the 93 most recent are listed here

2026 Apr
Other conditions class A
2026 Apr
Heat or hot water class C · closed
2026 Apr
Fire safety class B · closed
2026 Apr
Other conditions class B · closed
2025 Oct
PestsApt 11 class C · closed
2025 Oct
PestsApt 11 class C · closed
2025 May
Heat or hot water class B · closed
2025 May
Fire safety class C · closed
Show 38 more
2024 Dec
Fire safety class C · closed
2024 Dec
Fire safety class C · closed
2024 Dec
Fire safety class C · closed
2024 Dec
Doors and windows class C · closed
2024 Dec
Fire safety class C · closed
2024 Dec
Fire safety class B · closed
2024 Nov
Fire safety class C · closed
2024 Oct
Doors and windows class B · closed
2024 Oct
Doors and windows class B · closed
2024 Oct
Fire safety class C · closed
2024 May
Rubbish and cleanliness class B · closed
2024 May
Rubbish and cleanliness class B · closed
2023 Nov
Fire safety class C · closed
2023 Nov
Other conditions class B · closed
2022 Apr
Lead-based paint class C · paperwork
2022 Apr
Lead-based paint class C · paperwork
2021 Oct
Rubbish and cleanliness class B
2021 Oct
PestsApt 11 class C
2019 Oct
Walls, floors and stairsApt 1 class B
2019 Aug
Other conditionsApt 10 class C · paperwork
2018 May
Walls, floors and stairs class A
2018 May
Doors and windows class B
2018 May
Fire safety class B
2017 Jun
Fire safety class B
2016 Mar
Doors and windowsApt 11 class A · never closed
2015 Nov
Walls, floors and stairsApt 12 class A · never closed
2014 Apr
Smoke or CO detectorsApt 15 class B · never closed
2012 Aug
PestsApt 4 class B · never closed
2012 Aug
Walls, floors and stairsApt 4 class B · never closed
2011 Jan
Lead-based paintApt 16 class C · never closed
2011 Jan
Lead-based paintApt 16 class C · never closed
2011 Jan
Lead-based paintApt 16 class C · never closed
2011 Jan
Walls, floors and stairsApt 16 class A · never closed
2011 Jan
Doors and windowsApt 16 class A · never closed
2011 Jan
Doors and windowsApt 16 class A · never closed
2011 Jan
Walls, floors and stairsApt 16 class A · never closed
2011 Jan
Walls, floors and stairsApt 16 class A · never closed
2011 Jan
ElectricalApt 16 class B · never closed
and 26 more at the source
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

DOB violations

3 open: 3 about building conditions

DOB Violations, as of 2026-10-19 · Read these violations in full at DOB →
What this counts

Open DOB, ECB and DOB NOW Safety violations, any date, one per violation. ECB class 1 = hazardous, class 2 = major

Permit history

5 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

Nothing on record

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

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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