Building health · BROOKLYN, NY
built 1910 · 4 stories · 16 apartments
Registered with the city: 520 JEFFERSON AVENUE LLC
The building’s record over time
Filings, permits, complaints and violations from city records, newest first. Highlighted rows are unresolved and from the last year; older unresolved records are marked “never closed”. Tap any row to read it on the agency’s own site.
2026 Feb
LeaksApt 1C
Housing Maintenance Code Complaints and Problems
2026 Jan
PL-PER Gas Piping - LL152
DOB Violations
2025 Dec
Latest accepted inspection Dec 2025, defects reported: no
DOB NOW: Safety Boiler
2025 Nov
Heat or hot water
Housing Maintenance Code Complaints and Problems
2025 Jan
Heat or hot waterApt 3A
2025 Jan
Heat or hot water
2024 Nov
Doors and windows class B
Housing Maintenance Code Violations
2024 Nov
Fire safety class C
2024 Nov
ElectricalApt 3D class B
2024 Nov
PestsApt 3D class C
2024 Nov
Heat or hot waterApt 3D class C
2024 Nov
Heat or hot water
Housing Maintenance Code Complaints and Problems
2023 Jun
Fire safetyApt 4C class C
Housing Maintenance Code Violations
2022 Oct
Boiler burning No. 2 oil (Weil Mclain 780), registration expired since Oct 2022
Clean Air Tracking System (boiler registrations)
2017 Jan
Walls, floors and stairs class A
Housing Maintenance Code Violations
2015 Nov
Smoke or CO detectors class A · never closed
2015 Nov
Walls, floors and stairs class A · never closed
2013 Dec
Fuel burning permit, Boiler permit
DOB NOW: Build – Approved Permits
2013 Nov
Latest boiler work permit 2013
DOB Permit Issuance (BIS)
2009 Jul
Doors and windows class A · never closed
Housing Maintenance Code Violations
2009 Jul
Doors and windows class B · never closed
2007 Sep
Outside FEMA's 1% annual-chance flood zone: X
FEMA National Flood Hazard Layer
1993 Sep
Doors and windows class B · never closed
Housing Maintenance Code Violations
1993 Sep
ElectricalApt 3B class B · never closed
1993 Aug
Local Law 62/91 - Boilers never closed
DOB Violations
1910
Built
PLUTO (tax lot data)
Dates are the city's record dates, shown to the month.
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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Not an inspection and not a warranty. May not be used for tenant screening — terms of use · privacy.