4623 6th Avenue, Brooklyn, NY 11220

The 10-unit, 4-story building at 4623 6th Avenue in Sunset Park, owned by Da Yang, has a notable history of maintenance challenges since its construction in 1928. Most recently, in 2025, there have been multiple rodent sightings, with the Department of Health and Mental Hygiene confirming rat activity in inspections through April 2025. The building experienced recurring heat and hot water issues in late 2024, affecting both individual apartments and the entire building, though these issues were reportedly addressed promptly.

A cluster of maintenance concerns emerged in mid-2024, with violations related to building security, including defective doors and intercom systems, particularly affecting the 1st floor and apartment 3A. These issues were documented through 311 complaints and subsequent Housing Maintenance Code violations. The building's violation history reveals several ongoing safety concerns. As of June 2023, there are active violations related to the failure to file required external low-pressure inspections between 2019 and 2021.

There are also multiple open violations from 2024, including issues with self-closing doors, security systems, and the need for repairs to various building components. Notably, apartment 4C has documented problems with hot water temperature, pest infestation, and safety equipment. While some violations from earlier years have been resolved, including several from 2018-2021, the repetition of similar issues and the pattern of rodent activity suggest ongoing maintenance challenges within the building. The Department of Buildings records show various inspection attempts and some confirmed violations, though many inspection attempts resulted in inability to gain access for inspection.