Discover the Largest Mansion in Manhattan: A Gilded Legacy of Opulence

Nestled beyond the glitz of Midtown, Manhattan’s largest mansion stands as a silent testament to architectural ambition and timeless elegance—a sprawling estate where history and luxury converge.

Rising across acres of meticulously landscaped grounds, this largest mansion in Manhattan spans over 25,000 square feet of gilded interiors and expansive living spaces. With vaulted ceilings, grand staircases, and handcrafted details, it redefines opulent living in the heart of the city. Originally built as a private estate for a Gilded Age tycoon, its scale rivals only the most iconic country homes, now reimagined for contemporary luxury.

Designed by renowned 19th-century architects, the mansion fuses Beaux-Arts and Renaissance Revival styles, featuring sweeping ballrooms, a private chapel, and a library lined with rare first editions. Listed on the National Register of Historic Places, it preserves the craftsmanship of an era defined by craftsmanship and ambition. Its location in Manhattan’s Upper East Side offers seclusion amid urban sophistication, making it a cultural landmark as much as a private home.

Today, the mansion seamlessly blends heritage with modernity—state-of-the-art smart home systems, climate-controlled art galleries, and sustainable energy features coexist with original moldings and period fireplaces. With over a dozen bedrooms, a rooftop terrace, and formal gardens, it offers private retreats worthy of royalty. Its legacy continues as a sought-after venue for exclusive events and a symbol of Manhattan’s enduring architectural legacy.

More than just the largest mansion in Manhattan, this estate is a living museum of design and history. For those drawn to grandeur and legacy, it represents an unmatched opportunity to own a piece of the city’s most storied past—where every corner tells a story of elegance, ambition, and timeless beauty.

Everyone knows Manhattan is all about high-rise condos, but it wasn't always that way. What are the biggest buildings in Manhattan built as single-family homes? Jeffrey Epstein's former Upper East Side mansion has undergone a massive, million-dollar remodel in an attempt to scrub all traces of the pedophile financier and his twisted sex crimes, The Post.

Many of these "Millionaire's Row" mansions are located in the Upper East Side, but the question remains: What are the biggest buildings in Manhattan today that were built as single-family homes? Felix Warburg Mansion - Built in 1908, this building has remained the largest mansion in Manhattan for over a hundred years. Join New York Adventure Club for an in-depth exploration of The Cornelius Vanderbilt II House (1883-1926)-still considered one of New York City's largest houses ever built, this mega mansion on Manhattan's Fifth Avenue between 57th and 58th Streets boasted over 100 rooms featuring numerous gilded paneled parlors, a French. And now, courtesy of Christie's, a piece of true Gilded Age glamour can be yours for a cool $33 million.

Below, a sneak peek inside the 9. Check out the nicest homes currently on the market in Manhattan NY. View pictures, check Zestimates, and get scheduled for a tour of some luxury listings.

Search for luxury real estate in New York with Sotheby's International Realty. View our exclusive listings of New York homes and connect with an agent today. In 1925, Alice "applied to the Supreme Court today for permission to sell the Vanderbilt mansion at 57th Street and Fifth Avenue, Manhattan, for $7,100,000 cash," reported the Brooklyn Daily Eagle in August of that year.

One of the largest private residences ever built in New York City, the Cornelius Vanderbilt II mansion was completed in 1883 and expanded into an even grander home a decade later. Designed by architect George B. Post (1837-1913), the château-like edifice stretched along Fifth Avenue from 57th to 58th Street (the current site of Bergdorf Goodman).

Upstairs, Downstairs: Inside the Cornelius. Manhattan's largest listed home, the Woolworth Mansion, finds a buyer amid strongest October contract activity since 2021.