306 Jefferson Street, Brooklyn, NY 11237

306 Jefferson Street is a 4-story, 8-unit New Law Tenement building constructed in 1931, currently owned by David Grunfeld. The building has experienced recurring maintenance issues over recent years, with the most recent concerns centering on rodent activity, as evidenced by inspections in May and June 2025 showing rat activity. A notable pattern of sanitary conditions has emerged throughout the building's recent history, particularly between 2021-2023, including multiple reports of pests and mold, though most pest-related complaints were unable to be verified due to lack of access during inspections.

The building has also faced structural and maintenance challenges, including water leaks, floor issues, and problems with windows and doors, particularly affecting Unit 2L between 2021-2023. Recent inspections and violations indicate ongoing maintenance challenges, though some issues have been resolved. As of 2025, the building has successfully filed annual bedbug reports showing no infested units between 2021-2025, suggesting effective pest management in this regard.

The building underwent several permit issuances between 2019-2021, for plumbing and window-related work, indicating ongoing maintenance and improvement efforts. The most recent violation from April 2024 relates to the failure to file the annual bedbug report, though this appears to be administratively resolved. While some improvements have been made, including recent rodent inspections passing in November 2024, the pattern of recurring maintenance issues suggests ongoing attention to building upkeep will be necessary.