2025-04-10Class CClosed
§ 27-2033 ADM CODE PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM BOILER ROOM DOOR LOCKED AT CELLAR
HPD · 672 · Record 17818884
Building report
423 Lenox Avenue
Public records for this building, including violations, complaints, housing court cases and ownership details.
- Built
- 1910
- Units
- 9
- Owner of record
- ABJ SIERRA, LLC
- Open HPD violations
- 1
- HPD records on file
- 20
Violations at 423 Lenox Avenue
20 on record2025-04-10Class BClosed
§ 27-2045 ADM CODE REPAIR OR REPLACE THE SMOKE DETECTOR MISSING IN THE ENTIRE APARTMENT LOCATED AT APT 5B, 5th STORY, 1st APARTMENT FROM EAST AT SOUTH
HPD · 702 · Record 17818883
2025-04-10Class BClosed
§ 27-2046.1 HMC: REPAIR OR REPLACE THE CARBON MONOXIDE DETECTING DEVICE(S). MISSING IN THE ENTIRE APARTMENT LOCATED AT APT 5B, 5th STORY, 1st APARTMENT FROM EAST AT SOUTH
HPD · 1503 · Record 17818882
2025-04-10Class CClosed
HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 5B, 5th STORY, 1st APARTMENT FROM EAST AT SOUTH
HPD · 568 · Record 17818881
2025-04-10Class BClosed
§ 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE LIGHT FIXTURE AT THE CEILING IN THE KITCHEN LOCATED AT APT 5B, 5th STORY, 1st APARTMENT FROM EAST AT SOUTH
HPD · 501 · Record 17818880
Most serious open violation
2013-08-01Class BOpen
§ 27-2005 HMC:TRACE AND REPAIR THE SOURCE AND ABATE THE NUISANCE CONSISTING OF MOLD ... 16 SQUARE FEET AT WEST WALL IN THE 4th ROOM FROM EAST LOCATED AT APT 4A, 4th STORY, 1st APARTMENT FROM WEST AT NORTH
HPD · 550 · Record 9926188
1 open · 20 total on recordSee the full violation history
Who owns 423 Lenox Avenue?
Owner of record: ABJ SIERRA, LLC. An owner name can come from an earlier filing. Compare the latest HPD registration with the recorded deed before relying on it.
Apartments at 423 Lenox Avenue
Recorded residential units: 9. Recorded year built: 1910. These building facts do not show current vacancies or when a particular apartment was renovated.
This tax lot appears in the RGB list based on 2024 building registrations, published as of November 2025. That is a building-level historical signal; it does not identify which apartments are stabilized today. Check the official rent-stabilized building lists.
Look up more about this building
See the full record for 423 Lenox Avenue
The full report includes the grade, all 20 violations with dates and outcomes, housing court filings and ownership details.
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Included
- 01Overall grade and scores by category
- 02Details for all 20 HPD violations
- 03Housing court filings and outcomes
- 04Ownership history and LLC connections