Terrace and gold cupola against the skyline at 655 Sixth Avenue PHB, Chelsea

655 Sixth Avenue PHB Sold for $10.6M by Peter Ocean

SERHANT.'s Peter Ocean closed a 4,819-square-foot duplex penthouse, with three terraces and a gilded cupola, at the landmarked O'Neill Building in Chelsea for $10,600,000 in October 2026.

Listing: Peter Ocean — SERHANT.

$10,600,000 · Closed October 2026 · condo · 4 bed (configured as 3 plus den) · 3 full + 1 half baths · 4,819 sq ft interior · terraces 2,500+ sq ft · building 1887, condo conversion 2005

Peter Ocean of SERHANT. has closed the sale of Penthouse B at 655 Sixth Avenue, a duplex at the landmarked O'Neill Building in Chelsea. The condominium sold for $10,600,000 in October 2026.

The residence spans 4,819 square feet inside, with three terraces adding more than 2,500 square feet of outdoor space. Its 53-foot great room is framed by more than 220 linear feet of south- and east-facing windows, with skyline views. The kitchen is built for entertaining, with a large center island, Viking and Sub-Zero appliances, a butler's pantry and a separate breakfast room. The home is set up as three bedrooms but was designed for four. The whole upper level belongs to the primary suite, which has a spa bath, two walk-in dressing rooms and its own terrace.

The signature feature is the building's gold-coated Neo-Grec cupola, one of only a handful left in New York, which can serve as a media room or office. A private service entry, a laundry room and a 250-square-foot storage unit next to the apartment complete the home.

The O'Neill Building opened in 1887 as a department store on the Ladies' Mile and became condominiums in 2005. It has a 24-hour doorman, a concierge and a 4,000-square-foot common roof deck with an outdoor kitchen, and the West Village and Flatiron are close by.

Ocean leads The Ocean Team at SERHANT. and works across Manhattan's luxury market, from downtown lofts to homes on Fifth Avenue, Park Avenue and Central Park West.