Upper East Side.

Yes — the East 80s and 90s walk-up stock east of Third Avenue, mostly pre-war 4- to 6-story brick buildings, carries meaningfully higher open-violation counts than the large Fifth and Park Avenue co-ops. The pattern is the usual one: rent-stabilized walk-ups with deferred maintenance show class-A heat and plumbing flags more often. The audit's full breakdown is in the report.

Some are — particularly the 1960s-era white-brick buildings on Second and Third Avenues, where façade-defect filings, balcony repairs, and elevator-modernization permits have accumulated over time. Many of these buildings carry open DOB violations tied to ongoing façade work (FISP / Local Law 11 cycles). The audit separates active work from chronic neglect.

10028 (upper East 80s, East End / Yorkville) and 10128 (East 90s to 96th) tend to carry the highest per-building open-violation counts on the UES, driven by the walk-up belt east of Third Avenue. 10021 and 10065 (the marquee Park / Fifth / Lexington blocks of the 60s and 70s) carry meaningfully lower counts thanks to large co-op stock and professional management.

The Yorkville and East End walk-up stock carries a significant rent-stabilized tier through standard 6+ unit pre-1974 rules. The marquee Fifth and Park Avenue co-ops are mostly owner-occupied and not stabilized. The audit's DHCR check shows the specific building's current registration mix before you sign.

Several UES historic districts (Upper East Side HD, Carnegie Hill HD, Metropolitan Museum HD) carry LPC review requirements on façade and window work. Unpermitted modifications create LPC violations in addition to DOB filings. For any building inside a landmark district, the audit's DOB permit history is a useful proxy — open work without a closed sign-off can indicate LPC issues.