Tour a Transformed Architectural Gem on the Upper West Side

The Solarium Penthouse

Atop what was once the St. Agnes Boys High School, a beloved landmarked Beaux Arts building on the Upper West Side, this stunning 3,420 square foot, three-bedroom residence is a true rarity, a one-of-a-kind home combining old and new, historic architecture and contemporary conveniences in a space of remarkable volume and light.

The building was designed in 1908 by acclaimed architect William A. Boring, recognized for co-designing the Immigration Station at Ellis Island. During the transformation into condominiums by Tamarkin Co., the school retained its strikingly intricate carved stone façade—including parapets, filigreed windows, and limestone window bays—showing due respect for its architectural history and spirit. The building’s former life as a school imparts each residence with a delightfully uncommon layout and a warm and inviting ambiance.

Arresting in its scale and natural light, the Solarium Penthouse blends beautiful materials, a sophisticated palette, modern conveniences, and an air of tranquility. The space was originally the school’s gymnasium, which allowed for the creation of such dramatic spaces as a great room with a 20-foot arched and barrel-vaulted ceiling with a magnificent skylight and an ornate wall of glass that opens to a 491 square foot south-facing terrace.

The craftsmanship throughout is unparalleled, and no detail was overlooked in the selection of superior materials and finishes.

Combining refinement and functionality, the eat-in kitchen area boasts solid white oak cabinetry, polished Arabescato marble slab countertops and backsplashes, a walk-in pantry, and appliances from Wolf, Sub-Zero and Miele.

The master bath features hand-chosen Calacatta marble slabs, a custom white oak vanity crafted by Christopher Peacock, and Lefroy Brooks fixtures. Windows in the home are thoughtfully double-hung.

The Riverside–West End Historic District is an exclusive established neighborhood and one of the city’s most highly sought-after. The building enjoys an enviable location near Riverside and Central Parks, Lincoln Center, the Museum of Natural History, and numerous other cultural attractions. Residents at 555 West End benefit from a collection of thoughtfully chosen amenities, including 24/7 attended lobby, refrigerated storage, stroller valet, bicycle room, state-of-the-art gym, and a recreation room with a pool table, dart board and wet bar.

Offered at: $18,000,000
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