Manhattan · Unit 406 · BBL 1000166049
21 South End Avenue, Unit 406
New York, NY 10280 · Manhattan
Also written as: 21 S End Ave Apt 406 · 21 South End Avenue #406 · 21 S End Ave Unit 406
Part of 21 South End Avenue Condominium
Owner of record: SINSHEIMER, ALEXANDRA
Snapshot updated 2026-09-02 — open the app to refresh for live data.
Assessment (FY2027)
- Assessed value: $184,346
- Market value: $409,658
- Tax class: 2
Last recorded sale
$875,000 on 2025-08-26 (class R4)
Building
- Elevator apartment (D6)
- Built 1983
- 1712 residential / 1722 units
- 5 floors
- Zoning: BPC
- Lot area: 220,732 sf
- Building area: 1,881,621 sf
- Flood zone: 1
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/21-south-end-avenue-406-1000166049
Estimates are automated, not appraisals. Disclaimer · Terms · Privacy · Contact