Not on the city's tax-lien sale list (2019–2025). The owner has not fallen far enough behind on property tax or water charges to be flagged for a lien sale.
Housing court
No HPD housing-court cases on record for this building.
The building
2019
Built
9
Floors
93
Residential units
Elevator apartments
Type
Rent regulation
Likely rent-stabilized
The owner registered 54 stabilized units with New York State for 2023 — of about 93 apartments.
21
22
23
2021 — 93 units registered2023 — 54
421-a tax benefit
Rent stabilization here may be tied to a tax benefit and can end when the benefit expires.
No public data says which specific apartment is stabilized.
Registration counts apply to the building, not to unit numbers. To confirm your own apartment, request your rent history from New York State Homes and Community Renewal — it is free and takes a few weeks.
Class C is immediately hazardous, Class B is hazardous, Class A is non-hazardous. A violation stays open until HPD certifies the repair, so some open items may already be fixed.
CLASS C · IMMEDIATELY HAZARDOUSApt 509Issued 2024-09-04
§ 27-2005, 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE HINGES IN THE ENTRANCE LOCATED AT APT 509, 5th STORY, 1st APARTMENT FROM EAST AT SOUTH
Status: Notice issued, not yet certified
CLASS C · IMMEDIATELY HAZARDOUSApt 511Issued 2024-09-04
§ 27-2005, 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE HINGES IN THE ENTRANCE LOCATED AT APT 511, 5th STORY, 1st APARTMENT FROM SOUTH AT WEST
Status: Landlord hasn't certified a fix
CLASS C · IMMEDIATELY HAZARDOUSApt 509Issued 2024-07-08
§ 27-2005, 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE DOOR REQUIRES REFITTING IN THE ENTRANCE LOCATED AT APT 509, 5th STORY, 1st APARTMENT FROM EAST AT SOUTH
Status: Landlord hasn't certified a fix
Bedbug history
0
Infested, latest filing
5
Annual filings
2024–20250 infested · 0 eradicated
2023–20240 infested · 0 eradicated
2022–20231 infested · 1 eradicated
Self-reported by the owner for the year ending each filing. Counts are building-wide and do not say which apartment was affected.
Evictions
No executed evictions on record for this building.
311 complaints from tenants
25
All time
7
Last 12 months
Heat/Hot Water13
Unsanitary Condition6
Plumbing2
Appliance1
General1
Door/Window1
Electric1
Complaints record what a tenant reported, not a finding by the city. "Closed" often means the inspector could not gain access.
Heat/Hot WaterEntire Building2026-02-18 · closed
Heat/Hot WaterEntire Building2026-02-08 · closed
Heat/Hot WaterEntire Building2026-01-29 · closed
Neighborhood crime
Higher than averagevs. NYC apartment blocks
449
NYPD reports · last 12 mo
37
≈ per month
Felony161
Misdemeanor200
Violation88
NYPD complaints reported within about 1,000 ft (a few blocks) in the last year, by severity. This reflects what gets reported and where police are active as much as actual safety, and busier, denser, higher-foot-traffic blocks log more. Locations are approximate — the NYPD shifts each report to the nearest corner for privacy — so read this as rough context, not a safety score.
Unpaid city fines
$0
Balance due (active)
0
Active violations
0
Lost by default
DOB violations adjudicated by OATH carry money penalties. "Lost by default" means the owner never appeared at the hearing. An unpaid balance is a stronger "ignoring the city" signal than a raw violation count.
Concern level2 of 4
Moderate
013 open class-C HPD violations (immediately hazardous) — about 1 per 31 apartments
023 of those issued in the last 3 years
How this is set: open hazardous violations measured against the building's size, then raised by strong distress signals — HPD's enforcement program, court harassment findings, recent evictions, unpaid DOB fines, open housing-court cases, and a sold tax lien. Neighborhood noise and crime are not part of it. It describes the public record, not the condition of any one apartment, and a quiet record is not proof of a good building.
DOB building violations
0
Active
7
On record
0
Active, last 3 yrs
No active DOB violations.
Landlord and related buildings
Registered owner
50 Clarkson Partners llc
Head officer
Alexander kohn
Managing agent
Kohn Collective
1 other building share this owner's registration contacts. Shared contacts suggest common control, but they are not proof of ownership.
·Changed hands in 2026 — new owners sometimes move to raise rents or deregulate units
A pattern, not a prediction — many transfers are ordinary or between related companies.
8
Recorded sales
13
Mortgages / refinances
Last recorded sale2026-08-27 · no recorded price
Most recent mortgage2026-08-27 · $1,619,472.4
Sale2026-08-27no recorded price
50 CLARKSON PARTNERS LLC → 50 CLARKSON OWNERS LLC
Mortgage2026-08-27$1,619,472.4
borrower 50 CLARKSON OWNERS LLC · lender MORGAN STANLEY BANK, N.A.
Mortgage2021-08-19$14,791,000
borrower 50 CLARKSON PARTNERS LLC · lender CROSS RIVER BANK
Mortgage2018-03-06$22,500,000
borrower 50 CLARKSON PARTNERS LLC · lender PNC BANK, NATIONAL ASSOCIATION
Mortgage2018-03-06$1,709,000
borrower 50 CLARKSON PARTNERS LLC · lender PNC BANK, NATIONAL ASSOCIATION
From ACRIS recorded documents. Amounts are often $0 or nominal for transfers between related parties, and LLCs can obscure who is really involved — treat this as public-record context, not a valuation.
Neighborhood noise
Much higher than averagevs. NYC apartment blocks
1741
Noise reports · last 12 mo
145
≈ per month
57
% from neighbors
Residential1001
Street/Sidewalk410
Commercial192
Unspecified102
Vehicle33
Park3
311 noise complaints within about 1,000 ft (a few blocks) in the last year. Most reports here are about noise from inside buildings — neighbors, not the street. This counts how often people call 311, which tracks how densely populated and busy an area is as much as how loud it is — it is not a sound measurement.