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509 East 78th Street

Manhattan · Upper East Side-Lenox Hill-Roosevelt Island, NY 10075

Also listed by the City as 503 East 78th Street

509 East 78th Street is a 96-apartment building in Upper East Side-Lenox Hill-Roosevelt Island, built in 1905, managed by 78/79 York Associates LLC. The City has 5 open housing-code violations on file for it, 3 of them immediately hazardous, about 0.05 per apartment, about double the neighborhood norm for a building this size (HPD, as of 5 October 2026). No tenant has reviewed it here yet. Everything above comes from the City's own records.

Managed by 78/79 York Associates LLC

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Units
96
Year built
1905
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.

4.2/5Better than most nearbyScored from the records below against every building we cover. It is not a tenant rating. Nobody who lived here said this.

0tenant complaints

Filed with 311 in the past year

5open repairs

Outstanding with HPD

Immediately hazardous
3
Hazardous
1
Non-hazardous
1

What the open repairs are about

  • Doors, windows and locks2
  • Stairs, floors and ceilings1
  • Pests1
  • Other repairs1

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

The company that manages it, elsewhere

78/79 York Associates LLC manages 12 other buildings we cover, holding 1,248 apartments.

open violations
27open violations
immediately hazardous
3immediately hazardous
311 complaints
24311 complaints

in the past year

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 509 East 78th 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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Also managed by 78/79 York Associates LLC

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