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Diamond Mine Real Estate LLC

Registered managing agent · 11 graded buildings · data of 2026-10-16

#66

One of the most distressed large portfolios in New York City. Ranked #66 of 764 New York City management portfolios by recorded distress per unit — 152.1 penalty points per 10 units over three years (how grades work). See the full rankings

11Buildings
248Residential units
709Open violations
162Immediately hazardous
2Evictions (3 yrs)
260Heat complaints (3 yrs)

Grades across the portfolio

A1 B5 C2 D3

9% of this portfolio's graded buildings hold an A; 27% grade D or F. Across all 11 buildings the city currently records 709 open HPD violations, 162 of them immediately hazardous, and tenants called 311 about heat or hot water 260 times in the last three years.

Every building in the portfolio

BuildingBoroughUnitsGradePenalty rate
637 Nostrand Avenue Brooklyn 11216 18 D 381
50 Greene Avenue Brooklyn 11238 39 D 354
303 Putnam Avenue Brooklyn 11216 16 C 180
1398 Dean Street Brooklyn 11216 20 C 154
942 Bergen Street Brooklyn 11238 3 D 133
276 Throop Avenue Brooklyn 11206 8 B 116
299 Putnam Avenue Brooklyn 11216 16 B 114
403 Macon Street Brooklyn 11233 16 B 87
802 Bergen Street Brooklyn 11238 32 B 81
112 West 138 Street Manhattan 10030 54 B 64
471 Vanderbilt Avenue Brooklyn 11238 26 A 21

click any building for its full public record · penalty rate = severity-weighted city records per 10 units over three years

How this page is made

Buildings are attributed to this portfolio by the registered managing agent named in their HPD registrations — the entity responsible for day-to-day operations. Ownership LLCs are listed on each building's own page. Every figure is computed mechanically from records published by the City of New York and recomputed weekly, so a portfolio that fixes its buildings improves here. Corrections: support@mice.nyc.

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