655 6Th Ave

The O'Neill is a landmarked seven-story condominium block built in 1887 and rooted in the Ladies' Mile retail history. Its neo-Grec / Beaux-Arts cast-iron façade is distinguished by gilded corner cupolas and historic architectural detailing preserved during conversion to residences. The building contains a limited collection of large loft-style homes—primarily three- and four-bedroom configurations and expansive two-level lofts—characterized by very high ceilings (often 12–14 feet), oversized multi-pane windows, wide-plank hardwood floors, decorative moldings, and period doors and stained glass. Interiors typically include generous entertaining wings with eat-in or chef-caliber kitchens (Viking, Wolf, Sub‑Zero appliances common), formal dining areas, home offices or dens, substantial closet systems and deeded storage; many primary suites offer double vanities, soaking tubs and walk-in closets. Common areas support full-time staffed services: a 24-hour attended lobby, live-in superintendent, and a planted, professionally landscaped roof terrace with outdoor kitchen, grilling and seating. The building is pet-friendly, provides building storage and private outdoor spaces on select units (balconies or Juliet balconies), and sits on a prime Flatiron/Chelsea block near Trader Joe’s, Whole Foods, Madison Square Park, the High Line, galleries, theaters and multiple subway lines—offering an urban, culturally rich lifestyle with substantial apartment scale and historic character.