421 East 9th Street, Manhattan, NY 10009

421 East 9th Street is a 5-story, 20-unit old law tenement building constructed in 1900 and currently owned by Marlin Realty Associates LLC. The building has experienced recurring heating system issues over the past five years, with multiple emergency complaints regarding heat and hot water reported in 2022-2023, including two entire-building incidents in January 2023 and December 2022.

The property has exhibited ongoing challenges with its heating system, as evidenced by a December 2024 boiler-related complaint and several housing maintenance code violations from March 2019, including inadequate heat supply and locked boiler room access. The building has experienced rodent activity, most recently documented through inspections in early 2025 showing rat activity in January and March, though notably there were passed inspections in July 2024 and July 2023. A Department of Health and Mental Hygiene inspection in 2019 had been initiated regarding rodent signs.

The property has maintained a good track record with bedbug reports, showing zero infestations reported in the last eight annual filings from 2018 through 2025. The building's housing maintenance violations primarily stem from 2019, including issues with self-closing doors and heat supply in apartment E3. Recent inspections and complaints suggest persistent infrastructure maintenance challenges, particularly regarding the heating system, while the building has demonstrated compliance with bedbug reporting requirements and has shown variable results in rodent inspections, alternating between passed and documented activity.