9921 4th Avenue
A 6-story building with 52 apartments, built in 1987, in Brooklyn, NY 11209.
Addresses on the lot: 9911 to 9923 4th Avenue.
HPD records as of November 6, 2026
9921 4th Avenue has 3 open HPD violations, 1 of them immediately hazardous. Tenants made no complaints to HPD in the past year. It is registered to HARBOUR AT BAY RIDGE CONDO.
Does 9921 4th Avenue have open violations?
Yes: 3 open violations as of November 6, 2026. HPD sorts them by how soon the owner must fix them:
| Class | Deadline | Open |
|---|---|---|
| C, immediately hazardous | 24 hours for most | 1 |
| B, hazardous | 30 days | 2 |
| A, non-hazardous | About 90 days | 0 |
It has an open class C violation, as 70% of NYC buildings with 50 to 99 apartments do. More on buildings by size
Every violation on HPD Online ↗ · How to read HPD violations
What do tenants complain about?
Tenants made no complaints to HPD in the 12 months to November 6, 2026.
Among NYC buildings with 50 to 99 apartments, 77% had at least one complaint to HPD in the past year, and 65% had one about heat or hot water.
Every complaint on HPD Online ↗ · Noise complaints go to 311, not HPD
Who owns 9921 4th Avenue?
9921 4th Avenue is registered with HPD to HARBOUR AT BAY RIDGE CONDO. The registration also names a head officer and a managing agent, the people HPD contacts about the building.
The name is a condominium’s: each apartment has its own owner, so an apartment for rent here is usually rented from that owner, under the condo’s rules.
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
HPD’s record shows no housing court cases over conditions or harassment at this building.
City marshals carried out no evictions here in the five years to May 30, 2026.
For comparison, 1% of residential buildings in 11209 had a housing court case in the past five years.
Is 9921 4th Avenue rent stabilized?
No rent-stabilized apartments were registered here from 2018 to 2023. That doesn’t prove there are none: some owners don’t register them.
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
- 402 Marine Avenue38 apartments, built 1926
- 343 101st Street65 apartments, built 1931
- 425 101st Street24 apartments, built 1931
- 317 100th Street83 apartments, built 1962
- 351 Marine Avenue104 apartments, built 1931
- 10116 4th Avenue70 apartments, built 1983
HPD violations, complaints, registrations and housing court cases as of November 6, 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 3-06135-7501.