541 Isham St

Show 114 more

BE-EXT-LP Boiler DOB violation

Heat or hot waterApt 2B complaint

Heat or hot waterApt 44A complaint

Heat or hot waterApt 2A complaint

2025 Oct

Heat or hot waterApt 3A complaint

2025 Sep

Heat or hot waterApt 4A complaint

2025 Aug

BE-EXT-LP Boiler DOB violation

2024 Aug

Heat or hot waterApt 31A class C · HPD violation

Heat or hot waterApt 25B complaint

BE-EXT-LP Boiler DOB violation

2023 Oct

Low Pressure Boiler never closed · DOB violation

2014 May

1990 Oct

Fuel burning permit, Boiler permit

Heat source

Boiler burning No. 2 oil (Federal FST-80), registration current since Jul 2024

Clean Air Tracking System (boiler registrations), as of 2026-10-19 · See this building's boiler registrations on NYC Open Data →

Boiler inspection filings

Latest accepted inspection May 2026, defects reported: no

DOB NOW: Safety Boiler, as of 2026-10-17 · See the boiler filings at DOB →

What this counts

Accepted annual boiler inspection filings, any date

Boiler work permits

Latest boiler work permit 1990

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

20 heat or hot water complaints

Housing Maintenance Code Complaints and Problems, as of 2026-10-19 · 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 · 7 complaints, 2025–2026 · 4 in the past year

What has happened here

2026 Sep

Plumbing complaint

2026 Aug

PlumbingApt BASEME complaint

LeaksApt 35B class B · closed · HPD violation

LeaksApt 35B complaint

LeaksApt 54B class B · HPD violation

LeaksApt 24A class B · closed · HPD violation

Show 10 more

LeaksApt 24A class B · closed · HPD violation

LeaksApt 24A complaint

LeaksApt 53B complaint

PlumbingApt 22B complaint

PlumbingApt 22B complaint

PlumbingApt 21A complaint

PlumbingApt 21A complaint

LeaksApt 25A complaint

PlumbingApt 21A complaint

Plumbing, leaksApt 32A complaint

Water service line

Unknown - Lead Status Unknown (records)

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

Pests and cleanliness

Issues on record · 4 complaints, 2024–2026 · 2 in the past year

What has happened here

2026 Aug

MoldApt BASEME complaint

MoldApt 35B class B · HPD violation

MoldApt 35B class A · closed · HPD violation

MoldApt 35B complaint

Pests class C · closed · HPD violation

MoldApt 22B complaint

Show 8 more

MoldApt 43A class B · HPD violation

PestsApt 43A complaint

Unsanitary conditions complaint

MoldApt 32A complaint

MoldApt 53B complaint

MoldApt 1B class B · HPD violation

2023 Sep

MoldApt 42B class B · HPD violation

2023 Jun

MoldApt 32A class C · HPD violation

Electrical

2 complaints, 2025–2026

What has happened here

ElectricalApt 35B class B · closed · HPD violation

ElectricalApt 35B complaint

ElectricalApt 44A complaint

ElectricalApt 21A complaint

ElectricalApt 21A complaint

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 29 (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

74 open: 74 about building conditions — walls, floors and stairs (29), doors and windows (10), mold (8), fire safety (7); 11 immediately hazardous (class C). Also 47 older records from 1995–2016 never closed. 25 further violations from 2025–2026 were closed. 705 violations on record in all, 1983–2026 — the 215 most recent are listed here

Other conditions class A · closed

Walls, floors and stairsApt 35B class B · closed

LeaksApt 35B class B · closed

ElectricalApt 35B class B · closed

MoldApt 35B class A · closed

Doors and windowsApt 35B class B · closed

Show 42 more

Other conditions class A · closed

Fire safety class B · closed

Smoke or CO detectorsApt 54B class B

Smoke or CO detectorsApt 54B class B

Walls, floors and stairsApt 54B class B

LeaksApt 54B class B

Fire safety class C · closed

Doors and windowsApt 54B class B

Doors and windowsApt 54B class B

Doors and windowsApt 54B class B

Doors and windowsApt 54B class C · closed

Fire safetyApt 54B class C · closed

Walls, floors and stairsApt 24A class B · closed

LeaksApt 24A class B · closed

Walls, floors and stairsApt 24A class B · closed

LeaksApt 24A class B · closed

Fire safety class C · closed

Fire safety class C

Doors and windowsApt 21A class A · closed

Pests class C · closed

Fire safetyApt 33B class C · closed

Fire safetyApt 31B class C · closed

Fire safetyApt 55B class C · closed

Fire safetyApt 54B class C · closed

Doors and windows class B · closed

Fire safety class C · closed

Doors and windows class B · closed

Walls, floors and stairs class A

MoldApt 43A class B

Fire safetyApt 43A class C

Doors and windowsApt 43A class A

Other conditionsApt 43A class A

Walls, floors and stairsApt 43A class A

Walls, floors and stairsApt 43A class A

Heat or hot waterApt 31A class C

Walls, floors and stairsApt 1 class B

2022 Jul

Walls, floors and stairsApt 1 class B

and 71 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

10 open: 4 about filings or paperwork, 6 older than 10 years

Failure To Post Energy Grade/Score

2015 Nov

Construction class - 1 · never closed

Construction class - 1 · never closed

Quality of Life class - 2 · never closed

Construction class - 1 · never closed

Show 2 more

2014 May

Low Pressure Boiler never closed

2006 Sep

Construction non-hazardous · never closed

DOB Violations, as of 2026-10-18 · 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

62 heat or hot water, 7 line of travel, 4 plumbing, 3 leaks, 3 mold, 2 doors or windows, 2 electrical, 2 floors or stairs, 1 paint or plaster, 1 pests

Doors or windows, floors or stairs, plumbing, moldApt BASEME

Doors or windows, electrical, mold, leaksApt 35B

Show 133 more

Paint or plaster, leaksApt 24A

Line of travelApt 33B

Line of travelApt 31B

Line of travelApt 55B

Line of travelApt 54B

Line of travelApt 33A

Line of travelApt 22A

Heat or hot waterApt 2B

Heat or hot waterApt 44A

Heat or hot waterApt 2A

2025 Oct

Heat or hot waterApt 3A

2025 Sep

Heat or hot waterApt 4A

Floors or stairs, pestsApt 43A

Doors or windows, paint or plaster, plumbingApt 21A

2024 Aug

Appliances, doors or windows, paint or plasterApt 21A

2024 Jul

Unsanitary conditions

Appliances, electrical, floors or stairs, paint or plaster, plumbingApt 21A

Paint or plaster, leaksApt 25A

Appliances, doors or windows, electrical, paint or plaster, plumbingApt 21A

Doors or windows, plumbing, mold, leaksApt 32A

Heat or hot waterApt 25B

General repairsApt 22B

Doors or windowsApt 31A

2023 Oct

Fuel burning permit, Boiler permit

Housing Maintenance Code Complaints and Problems, as of 2026-10-19 · 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

1990 Oct

and 1 more at the source

DOB NOW: Build – Approved Permits, as of 2026-10-17 · 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

2026 Aug

Doors or windows, floors or stairsApt BASEME complaint

Other conditions class A · closed · HPD violation

Other conditions class A · closed · HPD violation

Doors or windowsApt 35B complaint

Smoke or CO detectorsApt 54B class B · HPD violation

Smoke or CO detectorsApt 54B class B · HPD violation

Show 20 more

Paint or plasterApt 24A complaint

Line of travelApt 33B complaint

Line of travelApt 31B complaint

Line of travelApt 55B complaint

Line of travelApt 54B complaint

Line of travelApt 33A complaint

Line of travelApt 22A complaint

Line of travel complaint

Other conditionsApt 43A class A · HPD violation

Floors or stairsApt 43A complaint

Doors or windows, paint or plasterApt 21A complaint

2024 Jul

Appliances, doors or windows, paint or plasterApt 21A complaint

Appliances, floors or stairs, paint or plasterApt 21A complaint

Paint or plasterApt 25A complaint

Appliances, doors or windows, paint or plasterApt 21A complaint

Doors or windowsApt 32A complaint

General repairsApt 22B complaint

Doors or windowsApt 31A complaint

2021 Dec

Failure To Post Energy Grade/Score DOB violation