Set within one of Manhattan's most distinguished landmark districts, the residence at 9 East 63rd Street embodies the timeless elegance and romance of New York's "Age of Innocence" era. Surrounded by some of the city's most important historic homes and institutions, this home is an extraordinary 25-foot-wide historic brownstone built in 1879, located just off Fifth Avenue in the heart of the East 60s.

Offering exceptional scale, beautiful natural light, and impressive ceiling heights throughout, the property presents a rare opportunity to create a magnificent single-family townhouse of grand proportions. Currently configured as a mixed-use property with an elevator, the building includes two medical office suites, one located on the basement level and the other on the ground floor. Above, the parlor level is arranged as a gracious floor-through residence with a rear extension and direct access to a large private terrace, creating an ideal setting for entertaining. The third and fourth floors are combined as a spacious duplex featuring expansive rooms, abundant light, and access to two additional terraces. The fifth floor is configured as a full-floor apartment with an efficient layout and another rear terrace. The house has eight working fireplaces.

Defined by its impressive width, multiple outdoor spaces, and elegant vertical flow, 9 East 63rd Street offers a truly exceptional canvas for transformation into a world-class single-family residence. The home naturally lends itself to grand entertaining rooms, richly scaled private quarters, and seamless indoor-outdoor living, all within a classic Upper East Side brownstone moments from Central Park and the luxury boutiques and galleries of Madison Avenue.