1647 Union St

2026 Mar

Heat or hot waterApt 4G class C · closed · HPD violation

Heat or hot water class C · closed · HPD violation

Heat or hot waterApt 3G class C · closed · HPD violation

Show 40 more

Heat or hot waterApt 4B complaint

Heat or hot water class C · closed · HPD violation

Heat or hot waterApt 4B class C · closed · HPD violation

Heat or hot waterApt 4B class C · closed · HPD violation

Heat or hot waterApt 4B complaint

Heat or hot waterApt 4E complaint

Heat or hot water class C · closed · HPD violation

Heat or hot waterApt 3G class C · closed · HPD violation

Heat or hot water class B · closed · HPD violation

2025 Jan

Heat or hot waterApt 4B complaint

Heat or hot waterApt 3B complaint

BE-EXT-LP Boiler DOB violation

Low Pressure Boiler DOB violation

2023 Jun

2019 Nov

Low Pressure Boiler DOB violation

Heat source

Boiler burning No. 2 oil (Federal FST-50), registration expired since Aug 2021

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 Feb 2024, 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

Heat and hot water complaints

12 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)

Boiler work permitsno recordNo boiler work permits on record

Water and pipes

Issues on record · 3 complaints, 2024–2026 · 1 in the past year

What has happened here

LeaksApt 4G class B · HPD violation

LeaksApt 4G class B · HPD violation

LeaksApt 4D complaint

LeaksApt 4A class B · closed · HPD violation

PlumbingApt 2F complaint

Plumbing class B · closed · HPD violation

Show 6 more

PlumbingApt 2E complaint

PlumbingApt 3E complaint

Plumbing, leaksApt 4E complaint

Plumbing complaint

2024 Feb

LeaksApt 4A complaint

2021 Mar

Plumbing permit

Water service line

Unknown - Lead Status Unknown (not verified)

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

Pests and cleanliness

1 complaint, 2024

What has happened here

PestsApt 4C class C · closed · HPD violation

Pests class A · paperwork · closed · HPD violation

Pests class A · paperwork · closed · HPD violation

MoldApt 2E complaint

PestsApt 2E class C · HPD violation

Fire and safety

Issues on record, most recently 2024

What has happened here

Fire safetyApt 3E class C · HPD violation

Electrical

1 complaint, 2026

What has happened here

ElectricalApt 4D complaint

Electrical class B · closed · HPD violation

2024 Aug

ElectricalApt 4G complaint

ElectricalApt 3E complaint

ElectricalApt 4E 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 2026-10-20

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 STAR score 54 (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

10 open: 10 about building conditions — walls, floors and stairs (5), leaks (2), doors and windows (1), fire safety (1); 4 immediately hazardous (class C). 25 further violations from 2025–2026 were closed. 241 violations on record in all, 1999–2026 — the 78 most recent are listed here

Walls, floors and stairsApt 4G class B

LeaksApt 4G class B

Walls, floors and stairsApt 4G class B

LeaksApt 4G class B

Walls, floors and stairsApt 4G class B

Walls, floors and stairsApt 4G class C

2026 Jun

Walls, floors and stairsApt 2B class B · closed

2026 Jun

Walls, floors and stairsApt 2B class A · closed

Show 27 more

Walls, floors and stairsApt 4C class B · closed

PestsApt 4C class C · closed

Pests class A · paperwork · closed

Heat or hot waterApt 4G class C · closed

Smoke or CO detectorsApt 4G class B · closed

Smoke or CO detectorsApt 4G class B · closed

Heat or hot water class C · closed

Doors and windowsApt 3G class C · closed

Heat or hot waterApt 3G class C · closed

Smoke or CO detectorsApt 4B class B · closed

Smoke or CO detectorsApt 4B class B · closed

Heat or hot water class C · closed

Heat or hot waterApt 4B class C · closed

Heat or hot waterApt 4B class C · closed

Walls, floors and stairsApt 4A class B · closed

LeaksApt 4A class B · closed

Pests class A · paperwork · closed

Heat or hot water class C · closed

Heat or hot waterApt 3G class C · closed

Electrical class B · closed

Heat or hot water class B · closed

Walls, floors and stairs class B · closed

Plumbing class B · closed

Fire safetyApt 3E class C

PestsApt 2E class C

Walls, floors and stairsApt 2E class A

Doors and windowsApt 2E class C

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

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

Failure To Post Energy Grade/Score

2019 Nov

Low Pressure Boiler

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

Resident complaints to the city

22 heat or hot water, 4 paint or plaster, 3 plumbing, 2 floors or stairs, 1 electrical, 1 leaks, 1 mold

Floors or stairs, paint or plasterApt 4G

Electrical, leaksApt 4D

2026 Mar

Heat or hot waterApt 4B

Show 36 more

Heat or hot waterApt 4B

Heat or hot water, paint or plasterApt 4A

Heat or hot waterApt 4E

Heat or hot water

2025 Jan

Heat or hot waterApt 4A

Floors or stairs, paint or plaster, plumbing, moldApt 2E

Heat or hot waterApt 4A

Heat or hot waterApt 4A

2024 Aug

ElectricalApt 4G

Electrical, floors or stairs, paint or plaster, plumbingApt 3E

Electrical, paint or plaster, plumbing, leaksApt 4E

Heat or hot water

Plumbing

Heat or hot waterApt 4B

Heat or hot waterApt 3B

Doors or windowsApt 4B

General construction permit

Heat or hot water

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

2 permits since 1990

2021 Mar

Plumbing permit

2020 Jul

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

Everything else on record

Floors or stairs, paint or plasterApt 4G complaint

Smoke or CO detectorsApt 4G class B · closed · HPD violation

Smoke or CO detectorsApt 4G class B · closed · HPD violation

Smoke or CO detectorsApt 4B class B · closed · HPD violation

Smoke or CO detectorsApt 4B class B · closed · HPD violation

Paint or plasterApt 4A complaint

Show 7 more

Floors or stairs, paint or plasterApt 2E complaint

Floors or stairs, paint or plasterApt 3E complaint

Paint or plasterApt 4E complaint