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Minor issues on record. Review the details below, but no major concerns.
503 West 121 Street is an elevator apartment building built in 1910 in Manhattan with 30 residential units. It holds a Grade B health score — most influenced by building safety — with 5 open HPD violations. Our analysis reviewed 159 records across 26 public data sources, benchmarked against similar large prewar residential buildings in NYC.
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Bedbug infestation: 1 unit affected
Tax Year 2026 Market Value: $6,043,000 Exemptions: $2,719,350
Annual bedbug filing — no infestations reported
Rent stabilization registration
HPD registration filed
Tax Year 2025 Market Value: $5,684,000 Exemptions: $2,557,800
Energy benchmark — Score: 16
Energy benchmark — Score: 16
Initial (Job PC8642517)
Boiler inspection — FEDERAL FST-125
Boiler external (low pressure) — AO SMITH
Initial (Job PC8555817)
Boiler external (low pressure) — FEDERAL
Initial (Job PC8463236)
DOB NOW: Inspection
DOB NOW: Inspection
Boiler inspection — A.O. SMITH HW-670
DOB NOW: Inspection
Initial (Job PC8354956)
Boiler external (low pressure) — AO SMITH
This report is an informational tool based on publicly available government records and does not constitute a “consumer report” under the Fair Credit Reporting Act. Building grades are editorial opinions and should not be used as the sole basis for housing, lending, or employment decisions. Data sourced from HPD, DOB, DOF, ECB, FDNY, 311, and other NYC agencies. Report errors to data@openstoop.com. See our Terms and Privacy Policy.