Manhattan · Unit 4B · BBL 1006931109
551 West 21st Street, Unit 4B
New York, NY 10011 · Manhattan
Also written as: 551 W 21st St Apt 4B · 551 West 21st Street #4B · 551 W 21st St Unit 4B
Part of 144 11th Avenue Condominium
Owner of record: ZHU, QIANYI
Snapshot updated 2026-09-02 — open the app to refresh for live data.
Assessment (FY2027)
- Assessed value: $244,701
- Market value: $543,780
- Tax class: 2
Last recorded sale
$1,825,000 on 2026-06-11 (class R4)
Building
- Condominium (RM)
- Built 2013
- 44 residential / 46 units
- 20 floors
- Zoning: C6-3 / M1-5
- Lot area: 17,388 sf
- Building area: 153,053 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/551-west-21-street-4b-1006931109
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