The O'Neill Building at 655 Sixth Ave. PHB

Penthouse B at New York City’s O’Neill Building is Sixth Avenue’s most revered home. This vast condo totals over seven thousand square feet including both indoor and terraced spaces. The great room reaches fifty-three feet in length. Currently configured as a three bedroom home, the space was originally built for four true bedrooms. The apartment faces both South and East hosting over 220 feet of windows, which bring in a superlative amount of light.

The master bedroom in PHB is located on the upper floor of this duplex penthouse. It is separated from the other living quarters by a grand stairway off the gallery. This private suite is one of the largest of its kind in all of New York City. The en-suite master bath has southern views and access to a private balcony.

The home has private service entry through its butler’s pantry. There is a 250 square foot storage space adjacent to the home for this unit. PHB has a private neo-Grec style Cupola included in its features. This twenty foot high belfry is gold coated and one of only an handful remaining in the world.

The O’Neil Building is a full service luxury condo located in Chelsea between West 20th Street and West 21st Street. Situated on what was once known as Ladies Mile, the O’Neill Building was built as a block long emporium to ladies fashion in 1887. It was converted to a residential condo in 2005. This 7-story elevator building has 49 residential units. It features a 4000sqft common roof deck with outdoor kitchen and dining space, laundry room and private storage. There is full-time doorman and concierge and it is pet-friendly.