621 Lefferts Avenue

A 6-story building with 122 apartments, built in 1926, in Brooklyn, NY 11203.

Addresses on the lot: 621 to 643 Lefferts Avenue.

HPD records as of October 30, 2026

96open HPD violations41 immediately hazardous

81complaints to HPD, past year33 about heat or hot water

118rent-stabilized apartmentsregistered in 2023

August 2026latest housing court case19 cases on record, all years

621 Lefferts Avenue has 96 open HPD violations, 41 of them immediately hazardous. Tenants made 81 complaints to HPD in the past year, 33 about heat or hot water. It is registered to M & M CROWN REALTY, LLC. 118 apartments were registered as rent stabilized in 2023.

Does 621 Lefferts Avenue have open violations?

Yes: 96 open violations as of October 30, 2026. HPD sorts them by how soon the owner must fix them:

Class	Deadline	Open
C, immediately hazardous	24 hours for most	41
B, hazardous	30 days	42
A, non-hazardous	About 90 days	13

It has an open class C violation, as 56% of NYC buildings with 100 or more apartments do. More on buildings by size

Of the violations HPD wrote here in the past year, 53 have been closed.

Every violation on HPD Online ↗ · How to read HPD violations

What do tenants complain about?

Tenants made 81 complaints to HPD in the 12 months to October 30, 2026, 33 of them about heat or hot water. Complaints reach HPD through 311; an inspector may then write a violation.

Among NYC buildings with 100 or more apartments, 72% had at least one complaint to HPD in the past year, and 57% had one about heat or hot water.

Every complaint on HPD Online ↗ · Noise complaints go to 311, not HPD

Who owns 621 Lefferts Avenue?

621 Lefferts Avenue is registered with HPD to M & M CROWN REALTY, LLC. The registration also names a head officer and a managing agent, the people HPD contacts about the building.

2 other buildings are registered to the same company name, with 0 open violations between them.

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 August 2026. HPD’s record has 19 cases here in all, going back to the 1990s.

City marshals carried out 2 evictions here in the five years to May 30, 2026.

For comparison, 4% of residential buildings in 11203 had a housing court case in the past five years.

Is 621 Lefferts Avenue rent stabilized?

118 apartments were registered as rent stabilized in 2023, up from 116 in 2018. That’s 118 of the building’s 122 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 building

The 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

HPD violations, complaints, registrations and housing court cases as of October 30, 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 3-01326-0045.