3721 Neptune Avenue, Brooklyn, NY 11224

The two-family house at 3721 Neptune Avenue in Sea Gate, owned by Chang Yang, has an extensive history of maintenance issues and violations dating back to 2004. Most concerning is an active gas utility referral complaint from May 2025, which requires attention given the potential safety implications.

The building has faced multiple violations related to habitability and safety requirements, including two open violations from September 2019 regarding gas leak notice requirements and an unauthorized basement rooming unit. The property underwent significant repair needs in 2004, with multiple violations recorded for the second-story apartment including issues with leaky faucets, defective bathroom fixtures, and problems with the building's exterior cement and chimney structure - though these were subsequently closed following repairs. More recent maintenance issues include a non-emergency electrical complaint regarding an outlet or switch in August 2021, which was investigated by the Department of Housing Preservation and Development with no violations issued.

The building's history also includes an investigation into an alleged illegal conversion in September 2019, though this was ultimately closed with no violations found. Given the age of the building (built in 1925) and the pattern of maintenance issues over the years, it's clear that while some historical problems have been addressed, there remain current concerns that require monitoring, particularly the recent gas utility referral. The property has a relatively small footprint of two stories and two units, typical for its building class designation.