Is 423 Lenox Ave rent stabilized?
423 Lenox Ave is a registered NYC rent-stabilized building in Harlem (North), Manhattan (10037). It has about 9 apartments, built in 1910.
Also written as 423 Lenox Avenue — or 423 Lenox Ave, Manhattan, NY 10037.
How this building compares
With about 9 apartments it is smaller than 75% of the 734 rent-stabilized buildings this site tracks in Harlem (North). Its 1910 construction date sits close to the 1910 median for stabilized buildings tracked in the neighborhood. HPD lists 1 open violation here, about one for every 9 apartments — below the 0.9 per apartment median for tracked buildings in the neighborhood. Of the 20 violations on record at the address, 4 are class C — HPD's immediately hazardous grade. Tenants have filed 64 HPD complaints at the address, none of them in the last twelve months.
Building details
| Borough | Manhattan |
| Neighborhood | Harlem (North) |
| ZIP | 10037 |
| Year built | 1910 |
| Apartments | 9 |
| Rent-stabilized | Yes — DHCR registered |
| Stabilization code | MULTIPLE DWELLING A |
| BBL | 1019160030 |
Owner & management
| Owner | ABJ SIERRA LLC 11 GRACE AVENUE #405 · Great Neck, NY 11021 |
| Managing agent | ABJ SIERRA LLC |
Building conditions
| HPD violations | 1 open / 20 total · 5 in last 12 mo |
| HPD complaints | 1 open / 64 total |
| HPD registration last filed | October 15, 2025 |