257 West End Avenue
While historically clean, our model detects a rising risk of severe maintenance issues in the next 12 months.
This building has 1 recorded HPD violations, at or below the Upper West Side average of 14.1.
Is 257 West End Avenue rent-stabilized?
Rent stabilization caps how much your rent can rise and protects your right to renew. Here's how this building scores on the four signals that usually point to it.
Based on public NYC records. Not legal advice — verify with the DHCR (Division of Housing and Community Renewal) at apps.hcr.ny.gov.
The 6-story, 34-unit residential building at 257 West End Avenue in the Upper West Side, owned by Mark Nathanson and constructed in 1942, has experienced significant pest management challenges in recent years. Most notably, the building has undergone three rodent infestation periods in 2021 (August), 2020 (July), and most recently in July 2025, with the most recent inspection showing rat activity. While regular bedbug reporting has been consistently maintained from 2019 through 2024, with all reports showing zero infested or eradicated units, there was a Housing Maintenance Code violation recorded in March 2023 related to the late filing of the annual bedbug report, though this appears to have been resolved as subsequent filings have been timely.
The building has undergone various construction and maintenance work as evidenced by multiple permits issued between 2018 and 2019, including plumbing, electrical, and exterior work. Between 2018 and 2021, regular rodent inspections showed a mix of passed and failed results, with particular attention needed to the pattern of failures in 2021. More recent rodent inspections in 2023 (September) and 2024 (August) passed, suggesting some improvement, though the July 2025 inspection indicating rat activity raises concerns about ongoing pest management challenges. The building's documented history shows consistent compliance with bedbug reporting requirements since the violation in 2023, though the fact that the building has had both rodent activity and bedbug reporting issues suggests ongoing challenges with maintaining optimal living conditions.
How 257 West End Avenue's risk score is calculated
We trained a model on 7 years of city inspection data — HPD violation filings, tenant complaints, and owner track records across their entire portfolio. It estimates the probability that HPD inspectors will find serious or dangerous violations at this address in the next 12 months. Lower % = safer.
What the score means for you
Out of 3016 buildings in this neighborhood, 1749 have a higher predicted risk.
violations
(1–9)
(10+)
What's driving this score
These are the three data points that most influenced this building's score — ranked by how much weight the model placed on each one.
Don't stop here — this is just the surface.
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What's in the 257 West End Avenue report
| Total units | 33 |
|---|---|
| Floors | 6 |
| Year built | 1942 |
| Gross area | 28,940 sq ft |
| Building class | — |
| Tax abatement | None |
Violations & complaints per year — solid line is historical record, dashed line is AI projection.
Included addresses
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257 West End Avenue's landlord & ownership
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Registered contact for this building.
New York, NY 10016
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257 West End Avenue event timeline
Violations, complaints, fines, and permits — the most recent records on file, in order.
See all 17 events
Full history back to 2021 — violations, complaints, permits, bedbug filings, and more.
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30+ public city datasets for this address — searchable and sortable.
What this is
Housing code violations issued by HPD against property conditions. Non-compliance with NYC's Housing Maintenance Code can result in violations and fines.
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What this is
Complaints filed with HPD about conditions violating the NYC Housing Maintenance Code or NY State Multiple Dwelling Law.
| Received | Category | Type | Status | Apartment |
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What this is
Service requests logged daily with the city through 311 and tracked to resolution. These are complaints that can be directed to specific city agencies.
| Created Date | Problem | Problem Detail | Agency Name | Status |
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What this is
All complaints received by the Department of Buildings, including those from 311 and complaints entered directly by DOB staff.
| Filed | Number | Status | Category | Disposition |
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What this is
Civil penalties and violation notices issued by the Department of Buildings for construction and building code violations.
| Issue Date | Category | Type | Description | Disposition |
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What this is
Summonses and penalties adjudicated by OATH (Office of Administrative Trials & Hearings) and the Environmental Control Board. DOB enforcement cases that have been heard and decided.
| Issue Date | Violation # | Status | Description | Penalty |
|---|---|---|---|---|
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Executed eviction warrants in NYC from 2017-present. Records of completed residential and commercial evictions processed through housing court.
| Executed Date | Docket # | Apartment | Type | Marshal |
|---|---|---|---|---|
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Recorded real estate transactions and property sales. Public records of building transfers and changes in ownership.
| Sale Date | Price | Building Class | Neighborhood | Apartment |
|---|---|---|---|---|
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What this is
Property owner reports of bedbug infestation status required by NYC law. Building owners must file annual reports on bedbug treatment and infestation history.
| Filing Date | Infested Units | Eradicated | Re-infested | Period End |
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What this is
NYC Department of Health & Mental Hygiene rodent inspection results. Records of inspections for rat and rodent infestation signs.
| Inspection Date | Type | Result |
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Construction and demolition permits issued by the Department of Buildings. Required for legal building, construction, and demolition activities in NYC.
| Filing Date | Type | Work | Floor | Description | Status | Issued |
|---|---|---|---|---|---|---|
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