425 Keap Street, Brooklyn, NY 11211
The six-story, 22-unit tenement building at 425 Keap Street in Williamsburg, owned by Frank Mazzocchi, has been a subject of various maintenance issues over the past several years, with the most recent concerns primarily centered around heating and hot water systems. Between 2019 and 2022, there were multiple complaints regarding heat and hot water, including a building-wide issue in October 2019 and apartment-specific problems in December 2021 and February 2022, all of which were addressed though not all inspections were successful in gaining access to verify corrections.
The building has also faced recurring issues with doors and windows, particularly two emergency complaints in 2021 and 2018, though inspections in 2021 found no violations. Significant violations include ongoing concerns about building security, with multiple citations between 2018-2020 regarding the use of electromagnetic locking devices at the main entrance that were marked as Class B and C violations.
The building has generally maintained good pest control standards, with bedbug reports from 2022-2024 showing zero infested units, and passed rodent inspections in 2018 and 2019. Historical compliance issues included failure to file required energy benchmarking reports between 2019-2020, though these violations were ultimately dismissed, and there were several ECB violations in 2021 regarding work without permits, which were resolved with no penalties assessed.
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Building Characteristics
Total units | 22 |
---|---|
Year built | 1915 |
Total area | 30800 sq ft |
Floors | 6 |
Tax Abatements | None |
Building Class | NEW LAW TENEMENT |

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Key Building Statistics
Included Addresses
- 433 Grand St, New York, NY 11211
- 435 Grand St, New York, NY 11211
- 437 Grand St, New York, NY 11211
- 425 Keap St, New York, NY 11211
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