Harlem.

ZIPs 10027 (Central Harlem, including Strivers' Row and the 125th Street corridor) and 10037 (East Harlem) tend to carry the highest per-building open-violation counts in Harlem, driven by older landlord-managed walk-ups and significant NYCHA presence. 10030 (West Harlem / Hamilton Heights edge) trends lower thanks to newer 1990s-2000s infill construction.

A large majority of pre-1974 Harlem walk-ups are rent-stabilized through standard 6+ unit rules. Newer construction along Frederick Douglass Boulevard and infill on 125th Street is mostly market-rate unless a 421-a or LIHTC abatement attached affordability terms. The audit's DHCR check shows the specific building's status before you sign.

NYCHA buildings appear in PLUTO with owner = New York City Housing Authority. The audit cross-references this on every BBL. If you're applying for a NYCHA apartment, the application process goes through NYCHA directly, not through a private listing. Renting a NYCHA unit privately without NYCHA's sublet program is not generally permissible.

Yes — most Harlem walk-ups predate 1978 and are subject to NYC Local Law 1 lead remediation when a child under 6 is in the unit. Several Harlem landlords carry significant open class-C lead-paint violations in our index. If you're moving in with young children, request the landlord's most recent lead inspection records as part of the lease process and check the audit for any open class-C lead flags.

The 125th Street corridor mixes pre-war walk-ups, 1990s-2000s mid-rise infill, and a smaller tier of post-2015 podium buildings. Open-violation density is mixed — the older walk-ups carry the standard pattern, the infill buildings carry fewer per-unit, and several of the newer podium buildings have accumulated DOB construction-phase or façade violations. Always pull the BBL.