312 East 21st Street, Brooklyn

City inspectors were last at this 54-unit elevator apartment building on August 12, 2026, and the resulting violation remains open.

312 East 21st Street is a 54-unit building in Brooklyn, New York City (BBL 3051240012). This building is associated with 312 East 21 Holding LLC. Brix tracks 45 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.

Built in 1940, this elevator apartment building sits in Brooklyn and is tracked by Brix using public NYC records from HPD, DOB, ACRIS, and 311.

Tenants have filed 393 HPD complaints about this building over the last five years, most often about door/window.

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

• Door/window: 114 complaints
• Unsanitary Condition: 82 complaints
• Water Leak: 45 complaints
• Heat/hot Water: 29 complaints

The most recent complaint on this building was filed August 11, 2026.

Conditions cited on open violations at this address:

• § 27-2045(B)(1)(B) HMC, § 12-06, § 12-07, § 12-09 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL CARBON MONOXIDE DETECTING DEVICE, INSTALLED IN ACC
• § 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT THE CEILING IN THE BATHROOM LOCATED AT APT 4J, 4th STORY, 1st APARTMEN
• § 27-2045(B)(1)(A) HMC, § 12-01, § 12-03 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL SMOKE DETECTING DEVICE, INSTALLED IN ACCORDANCE WITH DEPART
• § 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING IN THE BATHROOM LOCATED AT APT 4J, 4th STORY, 1st A

The building last changed hands on June 30, 2026, according to recorded deeds.

Brix rating: Concerning (9/100). View the Building Report on Brix.

See every NYC building owned by 312 East 21 Holding LLC on the landlord portfolio page.