621 WEST 51 STREET
621 WEST 51 STREET is a Class C4 (walk-up, three families) building in Manhattan (BBL 1010990020) built in 1901, with 8 residential units across 4 floors.
The building is in NYC community district 104, council district 3, zoning district M2-4, on a 2,510-square-foot lot with a building footprint of 5,040 square feet.
The current registered owner of record per NYC PLUTO is KEY 621 WEST 51ST STREET REALTY COMPANY LLC.
MetroDeeds shows no confirmed ACRIS deed transfer for this BBL in the last 5 years of recorded NYC public-records data.
The building is registered with NYC HPD's landlord-registration system and has no open HPD housing-maintenance code violations on record as of May 18, 2026.
Data sourced daily from NYC PLUTO (Department of City Planning), NYC ACRIS (Department of Finance), and NYC HPD housing-maintenance code violations.
Owner of record
HPD registered contacts
- Head OfficerIRVING SCHLUSSEL
- Corporate OwnerKEY 621 WEST 51ST STREET REALTY COMPANY
- Managing AgentKAREN SCHLUSSEL ADLER
- Site ManagerAL SCHLUSSEL
Most recent deed
Recent ACRIS documents (last 1)
Building stats
- Zoning:
- M2-4
- Lot size:
- 2,510 sqft
- Building area:
- 5,040 sqft
- Floors:
- 4
- Assessed value:
- $1.5M
- Community district:
- 104
- Council district:
- 3
HPD violations
Recent HPD violation details
- Class AInspected Apr 29, 2026(A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD…
- Class IInspected Nov 17, 2025§27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE…
- Class CInspected Jun 13, 2025§ 27-2044, 2041.1 HMC: §238 MDL and 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING THE DOORS THAT IS MISSING OR DEFECTIVE HINGES IN THE…
- Class AInspected Jun 4, 2025(A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR AS DESCRIBED ON HPD…
- Class IInspected Nov 22, 2024§27-2107 ADM CODE OWNER FAILED TO FILE A VALID REGISTRATION STATEMENT WITH THE DEPARTMENT AS REQUIRED BY ADM CODE §27-2097 AND IS THEREFORE…
Recent ACRIS activity
Frequently asked questions about 621 WEST 51 STREET
Who owns 621 WEST 51 STREET?
The current registered owner of record for 621 WEST 51 STREET per NYC PLUTO is KEY 621 WEST 51ST STREET REALTY COMPANY LLC. MetroDeeds shows no confirmed ACRIS deed transfer for this BBL in the last 5 years of recorded NYC public-records data.
When was 621 WEST 51 STREET last sold?
MetroDeeds shows no confirmed ACRIS deed transfer for 621 WEST 51 STREET in the last 5 years of recorded NYC public-records data. NYC ACRIS coverage extends back to 1966; an absence in our 5-year window typically means either the BBL has not transacted recently, or the most recent recorded document is not a DEED type (such as a refinance rather than a sale).
How many HPD violations does 621 WEST 51 STREET have?
No open HPD housing-maintenance code violations are on record for 621 WEST 51 STREET as of May 18, 2026. The building is registered with NYC HPD's landlord-registration system. HPD violation data is pulled daily from the NYC Open Data violations feed.
What is the assessed value of 621 WEST 51 STREET?
NYC Department of Finance assesses 621 WEST 51 STREET at $1.53M for the current tax year. NYC assesses property at a fraction of estimated market value (the assessment ratio varies by tax class — 6% for tax class 1 one-to-three-family dwellings, approximately 45% for tax class 2 rental apartment buildings), so the market value implied by this assessment is meaningfully higher. Assessment data is published by NYC Department of Finance.
What building class is 621 WEST 51 STREET and what does that mean?
621 WEST 51 STREET is NYC building class C4 — Walk-up, three families. A 3-to-6-story walk-up apartment building with 3 residential units. Building class is assigned by NYC Department of Finance and recorded in PLUTO; it determines the property's tax class and the regulatory regime that applies.