7424 21st Avenue, Brooklyn

61 open HPD violations at this address, 31 of them class C — the immediately hazardous tier — on a 6-unit walk-up apartment building in Brooklyn.

7424 21st Avenue is a 6-unit building in Brooklyn, New York City (BBL 3062180041). This building is associated with Chan, Sau Chun. Brix tracks 61 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.

Built in 1927, this walk-up apartment building sits in Brooklyn and is tracked by Brix using public NYC records from HPD, DOB, ACRIS, and 311.

Tenants have filed 1000 HPD complaints about this building over the last five years, most often about heat/hot water.

What tenants have called the city about here over the last five years:

• Heat/hot Water: 684 complaints
• Unsanitary Condition: 153 complaints
• Door/window: 99 complaints
• Plumbing: 21 complaints

The most recent complaint on this building was filed October 10, 2026.

Conditions cited on open violations at this address:

• § 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE WINDOW BALANSES AT LOWER SASH WINDOW AT SOUTH WALL IN THE 2nd ROOM FROM EAST LOCATED AT APT 3B
• § 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE WINDOW BALANSES AT LOWER SASH WINDOW AT EAST WALL IN THE 2nd ROOM FROM NORTH LOCATED AT APT 3B
• § 27-2011 ADM CODE CLEANSE TO THE SATISFACTION OF THIS DEPARTMENT THE THE FLOORS AT ALL STORIES AT PUBLIC HALL STAIRS
• HMC ADM CODE: § 27-2017

The building last changed hands on July 12, 2005 for $510,000, according to recorded deeds.

Brix score: 1/100. View the Building Report on Brix.

See every NYC building owned by Chan, Sau Chun on the landlord portfolio page.