The O'Neill Building at 655 Sixth Ave. 4G

This exceptional Flatiron loft at the historic O’Neill Building offers a rare blend of volume, elegance, and iconic New York architecture. The moment you enter, the home’s grand scale, high ceilings, and soaring south-facing windows create an immediate sense of serenity and light.

The expansive living and dining room is ideal for both everyday living and entertaining. It showcases beautifully restored cast iron columns, massive original windows, and meticulously curated modern upgrades. Recent enhancements include soundproof windows, newly installed oak flooring, and an in-unit washer and dryer, all contributing to a turnkey luxury experience.

The large, chef-friendly kitchen features Viking appliances, custom millwork, generous counter space, abundant storage, making it perfect for those who love to cook or entertain. The spacious primary suite offers a walk-in closet and a five-fixture marble ensuite bathroom that delivers true spa-level comfort.

Built in 1887 in the Neo-Grec style by Mortimer C. Merritt, the O’Neill is one of the most architecturally significant conversions in the Ladies’ Mile Historic District. Converted to condominiums in 2005, the building is known for its signature gilded corner domes and its beautiful roof terrace with panoramic city views.

Residents enjoy a 24-hour attended lobby, and an unbeatable location in the heart of Flatiron, moments from world-class dining, shopping, transportation, and the best of downtown Manhattan.