Manhattan · Unit 23B · BBL 1013411533

100 United Nations Plaza, Unit 23B

New York, NY 10017 · Manhattan

Also written as: 100 United Nations Plz Apt 23B · 100 United Nations Plaza #23B · 100 United Nations Plz Unit 23B

Part of 100 1st Avenue Condominium

Owner of record: MANN, JACK A

Snapshot updated 2026-09-02 — open the app to refresh for live data.

Assessment (FY2027)

  • Assessed value: $246,885
  • Market value: $548,632
  • Tax class: 2

Building

  • Condominium (R4)
  • Built 1984
  • 236 residential / 238 units
  • 49 floors
  • Zoning: C1-9 / C5-2
  • Lot area: 25,179 sf
  • Building area: 357,793 sf

Official records

ZoLa zoning · DOF property tax · Property Portal · ACRIS deeds/mortgages · DOB profile · Tax map · Map

All data sourced from NYC Department of Finance / PLUTO / ACRIS / HPD public records. https://www.sageops.ai/property/manhattan/100-united-nations-plaza-23b-1013411533

Estimates are automated, not appraisals. Disclaimer · Terms · Privacy · Contact