520 4 Ave

Fire safety class C · HPD violation

Fire safety class C · closed · HPD violation

Fire safety class B · closed · HPD violation

Fire safety class C · closed · HPD violation

Fire safety class C · closed · HPD violation

Fire safetyApt 6 class C · closed · HPD violation

Show 3 more

Fire safetyApt 8 class C · closed · HPD violation

Fire safety class C · HPD violation

Fire safety class C · HPD violation

Structure and facade

Issues on record

What has happened here

Structure and facade class B · HPD violation

Doors and windowsApt 6 class B · HPD violation

Walls, floors and stairsApt 6 class B · HPD violation

2026 Jun

Doors and windowsApt 1L class B · HPD violation

Doors and windows class C · HPD violation

Doors and windowsApt 6 class B · closed · HPD violation

Show 10 more

Doors and windowsApt 6 class B · closed · HPD violation

Walls, floors and stairsApt 8 class B · closed · HPD violation

Doors and windowsApt 8 class B · closed · HPD violation

Walls, floors and stairsApt 1L class B · closed · HPD violation

Doors and windowsApt 6 class C · HPD violation

Doors and windows class C · HPD violation

Walls, floors and stairsApt 6 class C · HPD violation

Doors and windowsApt 6 class B · HPD violation

Walls, floors and stairsApt 6 class B · HPD violation

Doors and windowsApt 6 class B · HPD violation

Facade ratingnot requiredNot required: facade inspections apply only to buildings taller than 6 stories
Sidewalk shed and scaffoldingno recordNo sidewalk shed permits on record
Landmark statusno recordNot in a historic district on record

Heat and hot water

Issues on record · 21 complaints, 2025–2026 · 10 in the past year

What has happened here

Heat or hot water class B · closed · HPD violation

Heat or hot water class C · closed · HPD violation

Heat or hot waterApt 8 class C · closed · HPD violation

Show 47 more

Heat or hot waterApt 1 class C · closed · HPD violation

Heat or hot waterApt 6 class A · closed · HPD violation

Heat or hot water class C · HPD violation

Heat or hot waterApt 1L class C · HPD violation

Low Pressure Boiler DOB violation

Heat or hot waterApt 8 complaint

Heat or hot waterApt 1 complaint

Heat or hot waterApt 8 complaint

Heat or hot waterApt 8 complaint

2025 Feb

2025 Jan

2025 Jan

Low Pressure Boiler DOB violation

2023 Dec

2023 Dec

2023 Nov

Local Law 62/91 - Boilers never closed · DOB violation

1993 Aug

1993 Jan

Fuel burning permit, Boiler permit

Heat source

Boiler burning No. 2 oil (H.B. Smith 19-S-5), registration expired since Feb 2025

Clean Air Tracking System (boiler registrations), as of 2026-10-21 · See this building's boiler registrations on NYC Open Data →

Boiler inspection filings

Latest accepted inspection Jun 2026, defects reported: no

DOB NOW: Safety Boiler, as of 2026-10-20 · See the boiler filings at DOB →

What this counts

Accepted annual boiler inspection filings, any date

Boiler work permits

Latest boiler work permit 1993

DOB Permit Issuance (BIS), as of 2026-10-20

What this counts

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

Heat and hot water complaints

15 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

Issues on record · 12 complaints, 2025–2026 · 9 in the past year

What has happened here

PlumbingApt 6 complaint

PlumbingApt 6 class B · HPD violation

LeaksApt 6 class C · HPD violation

Plumbing, leaksApt 6 complaint

PlumbingApt 6 class B · HPD violation

LeaksApt 6 class B · HPD violation

Show 24 more

LeaksApt 6 class B · HPD violation

PlumbingApt 6 class C · closed · HPD violation

LeaksApt 8 class B · closed · HPD violation

PlumbingApt 1L class B · closed · HPD violation

LeaksApt 1L class B · closed · HPD violation

PlumbingApt 1 complaint

LeaksApt 1L complaint

2025 Feb

2024 Oct

Plumbing, leaksApt 1L complaint

2024 Jul

PlumbingApt D1 complaint

2024 Jul

LeaksApt 3R complaint

2024 Jun

PlumbingApt 3 complaint

Plumbing, leaksApt 3R complaint

Plumbing, leaksApt 1L complaint

2023 Dec

LeaksApt 1 complaint

Water service line

Non-Lead (records)

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

Pests and cleanliness

Issues on record · 6 complaints, 2025 · 4 in the past year

What has happened here

PestsApt 6 class C · closed · HPD violation

MoldApt 8 class B · HPD violation

Unsanitary conditionsApt 6 complaint

Mold, pestsApt 6 complaint

Show 11 more

Unsanitary conditionsApt 1L complaint

PestsApt 1L complaint

Unsanitary conditionsApt 3 complaint

2024 Jul

PestsApt 3R complaint

Unsanitary conditions, mold, pestsApt 3R complaint

Unsanitary conditions, mold, pestsApt 1L complaint

MoldApt 1L complaint

Electrical

Issues on record · 7 complaints, 2025–2026

What has happened here

Electrical complaint

Electrical class B · HPD violation

Electrical class B · HPD violation

Electrical class B · HPD violation

Show 10 more

ElectricalApt 8 complaint

ElectricalApt 1 complaint

ElectricalApt 6 complaint

ElectricalApt 6 complaint

ElectricalApt 1L complaint

2024 Jun

ElectricalApt 3 complaint

ElectricalApt 3R complaint

ElectricalApt 3 complaint

2023 Nov

ElectricalApt 3 complaint

2023 Nov

Electrical complaint

Flooding

No issues on record

FEMA flood zone

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

FEMA National Flood Hazard Layer, as of 2026-10-21

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

Gas

What has happened here

PL-PER Gas Piping - LL152 DOB violation

Gas piping

Open violation for not filing the periodic gas piping inspection (2025)

DOB Safety Violations, as of 2026-10-20

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 (24), mold (13), doors and windows (9), electrical (5); 19 immediately hazardous (class C). Also 11 older records from 1985–2015 never closed. 25 further violations from 2026 were closed. 519 violations on record in all, 1985–2026 — the 294 most recent are listed here

Structure and facade class B

Doors and windowsApt 6 class B

Fire safety class C

PlumbingApt 6 class B

PlumbingApt 6 class B

Show 42 more

LeaksApt 6 class B

Walls, floors and stairsApt 6 class B

LeaksApt 6 class B

Fire safety class C · closed

2026 Jun

Doors and windowsApt 1L class B

Doors and windows class C

Fire safety class B · closed

Fire safety class C · closed

Fire safety class C · closed

Heat or hot water class B · closed

Heat or hot water class C · closed

Doors and windowsApt 6 class B · closed

PestsApt 6 class C · closed

Smoke or CO detectorsApt 6 class B · closed

Smoke or CO detectorsApt 6 class B · closed

Fire safetyApt 6 class C · closed

Doors and windowsApt 6 class B · closed

PlumbingApt 6 class C · closed

Fire safetyApt 8 class C · closed

Other conditionsApt 8 class B · closed

LeaksApt 8 class B · closed

Walls, floors and stairsApt 8 class B · closed

Doors and windowsApt 8 class B · closed

Heat or hot waterApt 8 class C · closed

Heat or hot waterApt 1 class C · closed

PlumbingApt 1L class B · closed

Walls, floors and stairsApt 1L class B · closed

LeaksApt 1L class B · closed

Heat or hot waterApt 6 class A · closed

Other conditionsApt 6 class B · closed

MoldApt 8 class B

Doors and windowsApt 6 class C

Heat or hot water class C

Doors and windows class C

Heat or hot waterApt 1L class C

Walls, floors and stairsApt 6 class C

Doors and windowsApt 6 class B

Electrical class B

Walls, floors and stairsApt 6 class B

Doors and windowsApt 6 class B

and 36 more at the source

Housing Maintenance Code Violations, as of 2026-10-20 · 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

4 open: 2 about building conditions, 2 about filings or paperwork

Low Pressure Boiler

PL-PER Gas Piping - LL152

Local Law 62/91 - Boilers never closed

Low Pressure Boiler

1993 Aug

DOB Violations, as of 2026-10-20 · 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

Resident complaints to the city

21 heat or hot water, 12 plumbing, 9 paint or plaster, 7 doors or windows, 7 electrical, 6 general repairs, 4 pests, 4 safety, 2 floors or stairs, 2 leaks, 2 mold, 1 unsanitary conditions

PlumbingApt 6

Doors or windows, general repairs, plumbing, leaksApt 6

Electrical