5409 Avenue O, Brooklyn, NY 11234
The three-story, 12-unit residential building at 5409 Avenue O in Flatlands, owned by Moshe Krengel and constructed in 1920, has experienced a series of recurring maintenance issues in recent years, particularly in 2024 and 2025. Most notably, between May 2025 and March 2025, there were multiple complaints and violations related to water leaks (heavy flow), stair maintenance, mold, wall conditions, and plumbing issues. The building has been subject to inspections and emergency violations for water leaks, flooring/stairs concerns, and unsanitary conditions, including mold problems.
Apartment 6 emerged as a focus of particular concern during late 2024, with violations documented for issues including broken plaster surfaces, peeling paint, missing window guards, door problems, and mold presence. The building also has active violations regarding exterior low-pressure inspection filings as of September 2024. The property has maintained a consistent record of pest management activity, with rat activity observed in several compliance inspections throughout 2024 and 2025, though recent bedbug reports show no infestations between 2020 and 2024.
A significant incident occurred in September 2024 when a violation was issued regarding a defective fire escape return rail at the building's front balcony. Previous complaints from 2019 (illegal conversion) and 2020 (construction concerns) were closed without violations being warranted. While some violations have been certified as corrected, others remain open, notably those related to paint conditions and fire escape maintenance. The building's ongoing maintenance issues, particularly involving water systems and pest control, suggest persistent challenges with building upkeep and resident comfort.
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Building Characteristics
Total units | 12 |
---|---|
Year built | 1920 |
Total area | 8760 sq ft |
Floors | 3 |
Tax Abatements | None |
Building Class | NEW LAW TENEMENT |

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