637 Nostrand Avenue, Brooklyn, NY 11216

637 Nostrand Avenue is a 5-story, 18-unit New Law tenement building constructed in 1910, currently owned by Richard Rosan. The property has experienced significant ongoing maintenance challenges in recent years, particularly during 2025, with multiple complaints related to unsanitary conditions, including persistent pest issues (with multiple pest-related complaints between March and April 2025) and several heat and hot water complaints.

The building has also faced multiple rodent-related issues in 2025, with inspections consistently showing rat activity, most recently confirmed on July 11, 2025, and earlier complaints in this regard have triggered inspections through the Department of Health and Mental Hygiene. The building's violation history reveals concerning safety issues, particularly in late 2024 when violations were issued for multiple safety concerns in Apartment 4E, including defective smoke and carbon monoxide detectors, leaky bathroom fixtures, and issues with bathroom ceiling paint. There are also outstanding violations from a December 2024 inspection related to various building systems and safety features, including problems with building entrance doors, staircase platforms, and fire escape access.

The building's systems have been under scrutiny, with multiple boiler-related complaints between 2021 and 2023 showing recurring issues with the heating system, including an active violation from July 2024 regarding the boiler room door and exit passageway. While the building has maintained a relatively low incidence of bedbug infestations in recent years (with only two reported cases between 2019-2021) and has submitted regular bedbug reports showing zero units infested in recent filings, the overall maintenance record suggests ongoing challenges with building systems and pest management. The property's maintenance permits from 2019-2020 suggest some level of ongoing repair and maintenance activity, though the persistent nature of recent complaints indicates potential difficulties in achieving long-term resolution of these issues.