16 East 84th Street

Manhattan · Upper East Side-Carnegie Hill, NY 10028

16 East 84th Street is an 8-apartment building in Upper East Side-Carnegie Hill, built in 1900, managed by Cornerstone MGMT Systems INC. The City has no open housing-code violations on file for it (HPD, as of 5 October 2026). No tenant has reviewed it here yet. Everything above comes from the City's own records.

Managed by Cornerstone MGMT Systems INC

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Units: 8
Year built: 1900
Neighborhood: Upper East Side-Carnegie Hill
Borough: Manhattan

This building’s record with the City

Complaints tenants filed with 311, and repairs a City inspector has asked for. Most repairs are routine maintenance. Both describe the building rather than the people in it, and often predate the current management.

5.0/5No open repairs or complaints on recordScored from the records below against every building we cover. It is not a tenant rating. Nobody who lived here said this.

Clean record: nothing outstanding, and no complaints from tenants in the past year.

Source: NYC 311 and Housing Preservation & Development. Look this building up · updated Oct 2026

The company that manages it, elsewhere

Cornerstone MGMT Systems INC manages 97 other buildings we cover, holding 1,211 apartments.

open violations: 227open violations
immediately hazardous: 57immediately hazardous
311 complaints: 40311 complaints
per apartment: 0.2per apartment

The company’s record across its other buildings, not this building’s. A company can run one well and another badly, and these figures often predate the current management. (HPD and 311, as of 5 October 2026.)

What tenants say

Nobody has written about 16 East 84th Street yet.

Does the heat hold in January? How long does the super take? Does management answer the phone, and were you charged what you expected? No public record answers any of that. Only someone who lived here can.

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