420 East 21st Street, Brooklyn, NY 11226

420 East 21st Street is a 4-story, 32-unit residential building located in Flatbush, constructed in 1924 and currently owned by 402 Cortleyou Road LLC. The property has experienced recurring heat and hot water issues in early 2025, with multiple complaints registered through 311, though most were subsequently resolved or confirmed as corrected upon HPD follow-up. December 2024 inspections revealed several violations, including locked access to the heating system and hot water issues in apartment 204, as well as concerns about carbon monoxide detectors, smoke detectors, and a defective mixing valve in apartment 402.

The building has a documented history of rodent activity, particularly noted in 2022 and 2023 inspections, though bait was applied and no recent infestations have been reported. Previous environmental control board violations from 2018 related to construction work involving a retaining wall between 420 and 412 East 21st Street resulted in significant fines, though these were subsequently resolved. More recent inspections and filings indicate some continuing maintenance challenges.

Between October 2024 and early 2025, multiple emergency complaints were filed regarding plumbing issues, wall conditions, and mold, with HPD unable to complete inspections in several cases. The building's maintenance history shows intermittent issues with inspection access and compliance, though violations have generally been addressed following official notifications. The property has maintained a clean record regarding bedbug infestations since 2022, with no reported cases in the past three years. While the building has experienced various maintenance challenges, particularly regarding heating systems and plumbing, many issues have been addressed through regular inspections and compliance measures, as evidenced by the certification of corrections to multiple violations in early 2025.