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Diamond Management

Registered managing agent · 13 graded buildings · data of 2026-10-16

#22

One of the most distressed large portfolios in New York City. Ranked #22 of 764 New York City management portfolios by recorded distress per unit — 236.4 penalty points per 10 units over three years (how grades work). See the full rankings

13Buildings
815Residential units
2,065Open violations
567Immediately hazardous
25Evictions (3 yrs)
576Heat complaints (3 yrs)
15Pending court cases

Grades across the portfolio

A3 B1 C6 D2 F1

23% of this portfolio's graded buildings hold an A; 23% grade D or F. Across all 13 buildings the city currently records 2,065 open HPD violations, 567 of them immediately hazardous, and tenants called 311 about heat or hot water 576 times in the last three years.

Every building in the portfolio

BuildingBoroughUnitsGradePenalty rate
755 Ocean Avenue Brooklyn 11226 95 F 683
1001 Woodycrest Avenue Bronx 10452 64 D 534
4200 Avenue K Brooklyn 11210 108 D 258
1041 Nelson Avenue Bronx 10452 58 C 231
3140 Kingsbridge Avenue Bronx 10463 70 C 189
4211 Avenue K Brooklyn 11210 73 C 155
224 Highland Boulevard Brooklyn 11207 88 C 151
30 West 190 Street Bronx 10468 84 B 137
821 Lydig Avenue Bronx 10462 60 A 39
109-17 153 Street Queens 11433 2 C 30
5207 15 Avenue Brooklyn 11219 3 C 20
150 Johnson Avenue Brooklyn 11206 42 A 20
43-01 46 Street Queens 11104 68 A 0

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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