Building Biography

The MapLandlordsNeighborhoodsZIP CodesGradesThe Mice MapAboutWhat's new

Hernco, LLC

Registered managing agent · 7 graded buildings · data of 2026-10-16

7

A mixed portfolio by the city's records. This portfolio carries 38.1 penalty points per 10 units over three years. It is not ranked — the rankings cover operators with at least 5 graded buildings and 200 units.

7Buildings
37Residential units
20Open violations
1Immediately hazardous
0Evictions (3 yrs)
3Heat complaints (3 yrs)

Grades across the portfolio

A5 B1 C1

71% of this portfolio's graded buildings hold an A; 0% grade D or F. Across all 7 buildings the city currently records 20 open HPD violations, 1 of them immediately hazardous, and tenants called 311 about heat or hot water 3 times in the last three years.

Every building in the portfolio

BuildingBoroughUnitsGradePenalty rate
251 20 Street Brooklyn 11215 6 C 128
316 58 Street Brooklyn 11220 7 B 77
5217 5 Avenue Brooklyn 11220 6 A 7
5311 5 Avenue Brooklyn 11220 3 A 5
5305 5 Avenue Brooklyn 11220 6 A 4
247 58 Street Brooklyn 11220 6 A 3
5309 5 Avenue Brooklyn 11220 3 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.

This is free, and stays free.
Built from public records by one person. Pay what you want if it helped.
Chip in