421 Audubon Avenue
A 5-story building with 38 apartments, built in 1900, in Manhattan, NY 10033.
Addresses on the lot: 421 to 425 Audubon Avenue, 521 West 186th Street.
HPD records as of October 28, 2026
421 Audubon Avenue has 31 open HPD violations, 12 of them immediately hazardous. Tenants made 36 complaints to HPD in the past year, 21 about heat or hot water. It is registered to 421 AUDUBON PARTNERS LLC. 27 apartments were registered as rent stabilized in 2023.
Does 421 Audubon Avenue have open violations?
Yes: 31 open violations as of October 28, 2026. HPD sorts them by how soon the owner must fix them:
| Class | Deadline | Open |
|---|---|---|
| C, immediately hazardous | 24 hours for most | 12 |
| B, hazardous | 30 days | 18 |
| A, non-hazardous | About 90 days | 1 |
It has an open class C violation, as 66% of NYC buildings with 20 to 49 apartments do. More on buildings by size
Of the violations HPD wrote here in the past year, 46 have been closed.
Every violation on HPD Online ↗ · How to read HPD violations
What do tenants complain about?
Tenants made 36 complaints to HPD in the 12 months to October 28, 2026, 21 of them about heat or hot water. Complaints reach HPD through 311; an inspector may then write a violation.
Among NYC buildings with 20 to 49 apartments, 69% had at least one complaint to HPD in the past year, and 53% had one about heat or hot water.
Every complaint on HPD Online ↗ · Noise complaints go to 311, not HPD
Who owns 421 Audubon Avenue?
421 Audubon Avenue is registered with HPD to 421 AUDUBON PARTNERS LLC. The registration also names a head officer and a managing agent, the people HPD contacts about the building.
The registration on HPD Online ↗ · The owner’s other buildings, on Who Owns What ↗ · Deeds and mortgages (ACRIS) ↗ · How to find who owns a building
Housing court and evictions
The latest housing court case over conditions or harassment opened in December 2025. HPD’s record has 26 cases here in all, going back to the 1990s.
City marshals carried out 1 eviction here in the five years to May 30, 2026.
For comparison, 37% of residential buildings in 10033 had a housing court case in the past five years.
Is 421 Audubon Avenue rent stabilized?
27 apartments were registered as rent stabilized in 2023, down from 28 in 2018. That’s 27 of the building’s 38 apartments. Whether one apartment is stabilized is in its rent history, which the tenant can ask the state for.
How to check if an apartment is rent stabilized
Scores out of ten, from today’s records
Score this buildingThe address check reads the latest complaints and violations and scores the building, the landlord, the noise on the block and the walk to the subway. On a StreetEasy listing, the Chrome extension adds light for the floor and value for the rent.
Buildings nearby
- 431 Audubon Avenue35 apartments, built 1912
- 511 West 186th Street35 apartments, built 1922
- 411 Audubon Avenue25 apartments, built 1915
- 507 West 186th Street35 apartments, built 1912
- 407 Audubon Avenue30 apartments, built 1915
- 547 West 186th Street27 apartments, built 1917
HPD violations, complaints, registrations and housing court cases as of October 28, 2026; evictions and rent-stabilized counts as of May 30, 2026; size and age from the city’s PLUTO. All from NYC Open Data. Public records, not legal advice. Tax lot 1-02156-0066.