Building health · MANHATTAN, NY

421 W 43 St

built 1910 · 5 stories · 15 apartments
Registered with the city: NINTH AVENUE REALTY LLC · 15 other buildings here list it; NINTH AVENUE REALTY, LLC · 14 other buildings here list it

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 Jun
Latest accepted inspection Jun 2026, defects reported: no
DOB NOW: Safety Boiler
2024 Jun
Boiler burning natural gas (Weil Mclain 678), registration current since Jun 2024
Clean Air Tracking System (boiler registrations)
2023 Jun
Plumbing permit
DOB NOW: Build – Approved Permits
2023 May
General construction permit
2022 Jul
Plumbing permit
2022 Jun
General construction permit
2019 Feb
MoldApt B2 class B
Housing Maintenance Code Violations
2018 Jul
Walls, floors and stairs class A · paperwork
2017 May
Plumbing permit, Heating/ventilation permit, General construction permit
DOB NOW: Build – Approved Permits
2015 Apr
Plumbing permit, General construction permit
2013 Jul
General construction permit
2007 Sep
Outside FEMA's 1% annual-chance flood zone: X
FEMA National Flood Hazard Layer
1997 Sep
Latest boiler work permit 1997
DOB Permit Issuance (BIS)
1910
Built
PLUTO (tax lot data)
See all records and sources
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.
Report an error · Talk to us · Look up another building
Not an inspection and not a warranty. May not be used for tenant screening — terms of use · privacy.
For AI and developers: llms.txt · API · MCP server · this card as markdown