2310 1st Avenue, Manhattan, NY 10035

The four-story, 8-unit Old Law Tenement building at 2310 1st Avenue in East Harlem, owned by Hydrogen USA LLC and built in 1900, has experienced numerous maintenance issues and regulatory concerns over recent years. Most significantly, the property has ongoing active violations related to infestation, building structure, and plumbing systems. These include open violations from December 2024 in Apartment 2N for pest infestations (roaches and mice), lead paint hazards, and various electrical and flooring issues.

The building has faced multiple challenges with water-related problems, including a July 2025 water leak that generated emergency housing maintenance complaints. There are also multiple active Environmental Control Board violations from 2024 regarding structural concerns and improper water system installations, with substantial penalties imposed. Recent 311 service requests from 2025 highlight persistent sanitation issues, particularly concerning garbage storage, though some of these complaints resulted in violations being issued.

The building's mechanical systems have been a recurring concern, with violations for unpermitted work on plumbing systems and concerns about a tankless water heater installation. Despite these ongoing issues, the building has consistently passed rodent inspections from 2018 through 2024, with the most recent inspection showing rat activity in July 2025. The property has a documented history of building work requiring permits that was performed without proper authorization, particularly during 2024 when multiple complaints were filed regarding unauthorized modifications to the building's structure and systems, though inspectors often were unable to gain access to verify these conditions.