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Free Building Background Check

517 West 121 Street

MANHATTAN, NY 10027 BBL 1019760019 242 units · 18 floors · 2004

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HPD violations vs. neighborhood
Class B/C violations on record vs. a typical building in Morningside Heights
? vs. avg
Fewer violations More violations

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Rent & eviction protection

Is 517 West 121 Street 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.

Built before 1974
Built 2004
6 or more units
242 units
Registered with RGB
Not found
421-A / J-51 abatement
None found
Likely not rent stabilized. This building doesn't show the typical signals — but confirm with the DHCR (Division of Housing and Community Renewal) if you suspect otherwise.

Based on public NYC records. Not legal advice — verify with the DHCR (Division of Housing and Community Renewal) at apps.hcr.ny.gov.

Augrented Insights
AI summary · updated June 2026

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How we score buildings

How 517 West 121 Street'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

Neighborhood percentile
98th percentile

Out of 257 buildings in this neighborhood, 252 have a higher predicted risk.

RiskiestSafest
Predicted violation outcome
86.5%
No serious
violations
9.4%
Some violations
(1–9)
4.1%
Many violations
(10+)
Risk factors

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.

Building size

Total residential square footage — a proxy for building scale and the number of systems (plumbing, HVAC, etc.) that can fail.

Building age

Older buildings tend to have more maintenance challenges, particularly pre-war construction without modern infrastructure.

Neighborhood (ZIP code)

The ZIP code captures local housing market conditions and enforcement patterns that affect all buildings in the area.

Building characteristics
Total units242
Floors18
Year built2004
Gross area112,000 sq ft
Building class
Tax abatementNone
Issue trend & model projection

Violations & complaints per year — solid line is historical record, dashed line is AI projection.

Multiple entrances & addresses

Included addresses

All street addresses that share this building's BBL and are covered by this report.

516 West 122nd St, New York, NY 10027
517 West 121st St, New York, NY 10027
Who's behind the building

517 West 121 Street's landlord & ownership

The people and companies registered to this building, the other properties they run, and their court record. A landlord's wider portfolio is often the best predictor of how your building will be treated.

Corporate Owner

Registered contact for this building.

Name
Teachers College Columbia
Address
525 W 120Th St, Box 312
New York, NY 10027
Landlord portfolio

Other properties owned.

Portfolio data hidden

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What residents say

Reviews from 517 West 121 Street tenants

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On the map

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