Building health · MANHATTAN, NY

409 W 21 St

built 1853 · 4 stories · 5 apartments

Heat and hot water

No issues on record
What has happened here
2010 Apr
Heating/ventilation permit
  • Heat sourceno recordNo boiler registration or district steam on record
  • Boiler inspection filingsnot requiredNot required: residential buildings with 6 or fewer units are exempt from annual filings
  • Boiler work permitsno recordNo boiler work permits on record
  • Heat and hot water complaintsfound0 heat or hot water complaints

Water and pipes

No issues on record
What has happened here
2010 Jun
Plumbing permit
Water service line

Non-Lead (records)

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

Pests and cleanliness

2 resolved since 2024
What has happened here
2025 Jun
Pests class A · paperwork · closed · HPD violation
2024 Apr
Pests class A · paperwork · closed · HPD violation

Structure and facade

No issues on record
What has happened here
2012 Oct
General construction permit
2012 Jun
Scaffold permit
2011 Mar
General construction permit
2007 Oct
General construction permit
Landmark statusWhole tax lot

In the Chelsea Historic District

PLUTO (tax lot data), as of 2026-08-24
  • Facade ratingnot requiredNot required: facade inspections apply only to buildings taller than 6 stories
  • Sidewalk shed and scaffoldingfoundNo active shed permit

Flooding

No issues on record
FEMA flood zone

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

FEMA National Flood Hazard Layer, as of 2026-10-17
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

Above grade

PLUTO (tax lot data), as of 2026-08-24

General condition and all records

Permit history

6 permits since 1990

2012 Oct
General construction permit
2012 Jun
Scaffold permit
2011 Mar
General construction permit, Plumbing permit, Heating/ventilation permit
2007 Oct
General construction permit
and 2 more at the source
DOB NOW: Build – Approved Permits, as of 2026-10-16 · 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
2023 Nov
Other conditions class I · paperwork · closed · HPD violation
  • HPD violationsfound0 open. 3 further violations from 2023–2025 were closed. 4 violations on record in all, 2023–2025 — the 3 most recent are listed here
  • DOB violationsfound0 open
  • Resident complaints to the cityfoundno complaints

Nothing on record

Gasno record
  • Gas pipingno recordNo open gas piping filing violations. Inspection results themselves are not published
Energyno record
  • Energynot requiredNot required: energy reporting applies to buildings over 25,000 sq ft
ElevatorsNot applicable
  • Elevatorsnot requiredNo elevators registered to this building
Rent and tenancyNot applicable
  • Rent stabilizationnot requiredNot on the state's list. Rent stabilization generally applies to buildings with 6 or more apartments

Sources

23 datasets

FEMA

NYC DCP

NYC DEP

NYC DEP / Mayor's Office

NYC DOB

NYC DOB / Mayor's Office

NYC HPD

NYC OTI

NYC Rent Guidelines Board / NYS HCR

Each date is when we last checked that dataset, not when the record itself was created.

Every row shows the record it came from and the date it was last checked.
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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