8401 3rd Avenue, Brooklyn, NY 11209

8401 3rd Avenue is a four-story, six-unit New Law Tenement building located in Bay Ridge and owned by Nikolaos Leonardos. Built in 1923, the property has faced several notable issues over the past decade. Between 2018 and 2019, there were multiple heating and hot water emergencies documented, including incidents involving the entire building's systems in November 2019.

More recently, from 2020 to 2025, the building has experienced recurring concerns with smoking violations, indoor air quality issues, and food establishment complaints, particularly during 2022-2024. The building's most recent complaints in late 2024 involved food establishment concerns and smoking violations, both of which have been closed by the Department of Health and Mental Hygiene (DOHMH). The property has faced some regulatory challenges, as evidenced by multiple open Housing Maintenance Code Violations from 2020 related to safety posting requirements, including smoke detector requirements, carbon monoxide device requirements, and gas leak procedures, though an April 2021 bedbug report indicated no infested units.

The building's maintenance history shows some attention to pest control, with regular bedbug reporting showing zero infestations from 2020 through 2024, and passed rodent inspections in 2015. Notably, there was a power outage in June 2020 that was addressed by the Department of Housing Preservation and Development (HPD), and various health and safety matters have been consistently addressed through 311 service requests. The most recent building permit on record, issued in November 2018, was for an alteration work job (job number 340646554).