Rank (does not include demolished and under construction) Rank (includes demolished and under construction) Square footage Name Location Built for Owner Year completed Architectural style Architect Image 135,280 Biltmore Estate Asheville, North Carolina George Washington Vanderbilt II William A.V. Cecil 1895 Châteauesque Richard Morris Hunt 109,000 Oheka Castle Huntington, New York Otto Hermann Kahn Gary Melius 1919 Châteauesque Delano and Aldrich - 100,000 Whitemarsh Hall Wyndmoor, Pennsylvania Edward T. Stotesbury (demolished in 1980) 1917 Georgian Horace Trumbauer 97,188 Arden House Harriman, New York Edward Henry Harriman Research Center on Natural Conservation 1909 Châteauesque Carrère and Hastings 5 96,582 Winterthur Winterthur, Delaware Henry Francis du Pont Winterthur Museum, Garden and Library 1932 Georgian Revival Henry Francis du Pont - 6 90,000 Cornelius Vanderbilt II House New York, New York Cornelius Vanderbilt II (demolished in 1926) 1882 Châteauesque George B. Post 5 6 90,000 Shadow Lawn West Long Branch, New Jersey Hubert Templeton Parson Monmouth University 1927 Beaux - Arts Horace Trumbauer 6 8 88,000 Meadow Brook Hall Rochester Hills, Michigan Matilda Dodge Wilson Oakland University 1929 Tudor Revival Smith Hinchman & Grylls 7 9 80,000 Florham Florham Park, New Jersey Hamilton and Florence Vanderbilt Twombly Fairleigh Dickinson University 1897 Georgian Revival McKim Mead & White - 9 80,000 Harbor Hill Roslyn, New York Clarence Hungerford Mackay (demolished in 1947) 1899 Châteauesque McKim Mead & White 8 11 75,000 Indian Neck Hall Oakdale, New York Frederick Gilbert Bourne St. John 's University 1908 Federal Style Ernest Flagg - 12 72,215 Pensmore Highlandville, Missouri Steven T. Huff Steven T. Huff 2016 Châteauesque - 13 72,000 Inisfada North Hills, New York Nicholas Frederic Brady (demolished in 2013) 1919 Tudor Revival John Torrey Windrim 9 14 70,000 Idle Hour Oakdale, New York William K. Vanderbilt Dowling College 1901 English Country Style Richard Howland Hunt 9 14 70,000 Lynnewood Hall Elkins Park, Pennsylvania Peter A.B. Widener Richard Yoon 1900 Neoclassical Horace Trumbauer 9 14 70,000 Woodlea Briarcliff Manor, New York Margaret Louisa Vanderbilt Shepard Sleepy Hollow Country Club 1895 Georgian Revival Stanford White 12 17 68,500 Hearst Castle San Simeon, California William Randolph Hearst California Department of Parks and Recreation 1947 Spanish Colonial Revival Julia Morgan 13 18 66,341 Grey Towers Castle Glenside, Pennsylvania William Welsh Harrison Arcadia University 1896 Gothic Revival Horace Trumbauer 14 19 64,389 Fairfield Pond Sagaponack, New York Ira Rennert Ira Rennert 2003 Italian Renaissance Ferguson and Shamamian 15 20 62,500 Mar - a-Lago Palm Beach, Florida Marjorie Merriweather Post Donald Trump 1927 Spanish Colonial Revival Marion Sims Wyeth Joseph Urban 16 21 62,482 The Breakers Newport, Rhode Island Cornelius Vanderbilt II Preservation Society of Newport County 1895 Italian Renaissance Richard Morris Hunt - 22 62,317 Versailles Windermere, Florida David A. Siegel David A. Siegel (under construction) Châteauesque 17 23 62,220 Gemini Manalapan, Florida Gerard Barnes Lambert, Sr Dirk Edward Ziff 1940s Mediterranean Revival Marion Sims Wyeth Edson E. Dailey 18 24 60,000 Whitehall Palm Beach, Florida Henry Morrison Flagler Henry Morrison Flagler Museum 1902 Beaux - Arts Carrère and Hastings - 24 60,000 Pembroke Glen Cove, New York Joseph De Lamar (demolished in 1968) 1916 Neoclassical C.P.H. Gilbert - 24 60,000 El Mirasol Palm Beach, Florida Edward T. Stotesbury (demolished in 1958) 1920 Spanish Colonial Revival Addison Mizner - 27 58,000 Duke Farms Hillsborough Township, New Jersey James Buchanan Duke Duke Farms Foundation (Mansion was demolished in 2016) 1903 Tudor Revival Henry H. Kendall 19 28 57,000 Eschman Meadows Nashport, Ohio Tami Longaberger 2001 Georgian George Acock Phil White 20 29 56,881 Castle Hill Ipswich, Massachusetts Richard Crane The Trustees of Reservations 1928 English Baroque David Adler 21 30 56,368 Andrew Carnegie Mansion New York, New York Andrew Carnegie Smithsonian Institution 1901 Georgian Revival Babb, Cook & Willard 22 31 56,000 Blairsden Peapack - Gladstone, New Jersey Clinton Ledyard Blair T. Eric Galloway 1903 Châteauesque Carrère and Hastings 23 32 55,360 Ralston Hall Belmont, California William Chapman Ralston Notre Dame de Namur University 1864 Italianate Henry W. Cleaveland 24 33 55,000 White House Washington, D.C. United States of America National Park Service 1800 Neoclassical James Hoban - 33 55,000 Belle Grove White Castle, Louisiana John Andrews (demolished in 1952) 1857 Greek Revival Italianate Henry Howard 24 33 55,000 Elm Court Lenox, Massachusetts Emily Thorn Vanderbilt Travaasa Experiential Resorts 1885 American Shingle Style Peabody and Stearns 26 36 54,838 Dumbarton Oaks Washington, D.C. William Hammond Dorsey Harvard University 1801 Colonial Revival 27 37 54,400 Chateau Montagel Shoal Creek, Alabama Larry House Medical Cloud Computing LLC Châteauesque Bill Shephard 28 38 54,246 Searles Castle Great Barrington, Massachusetts Mary Hopkins Searles John Dewey Academy 1883 Châteauesque McKim Mead & White 29 39 53,000 Nottoway White Castle, Louisiana John Hampden Randolph Paul Ramsay 1858 Greek Revival Italianate Henry Howard 30 40 52,897 Hala Ranch Aspen, Colorado Bandar bin Sultan John Paulson 1991 Rustic Hagman Yaw 31 41 52,503 The Manor Los Angeles, California Aaron Spelling Petra Stunt Châteauesque James Langenheim & Associates 32 42 52,300 Felix M. Warburg House New York, New York Felix M. Warburg Jewish Museum of New York 1906 Châteauesque Charles Pierrepont Henry Gilbert 33 43 51,134 Stan Hywet Hall Akron, Ohio Frank Seiberling Stan Hywet Hall Foundation 1915 Tudor Revival Charles Sumner Schneider 34 44 51,000 Hacienda De La Paz Rolling Hills, California John Z. Blazevich John Z. Blazevich 2008 Spanish Colonial Revival Rafael Manzano Martos 35 45 50,853 Chase Mansion West Hartford, Connecticut Arnold Chase Arnold Chase 2009 Georgian Allan Greenberg Architect, LLC 36 46 50,729 Perry Belmont House Washington, D.C. Perry Belmont Order of the Eastern Star 1909 Beaux - Arts Ernest Sanson Horace Trumbauer 37 47 50,316 Otto H. Kahn House New York, New York Otto Hermann Kahn Convent of the Sacred Heart 1914 Renaissance Revival J. Armstrong Stenhouse Charles Pierrepont Henry Gilbert 38 48 50,000 Reid Hall Purchase, New York Whitelaw Reid Manhattanville College 1892 Renaissance Revival Stanford White - 48 50,000 Wingwood House Bar Harbor, Maine Alexander Cassatt (demolished in 1953) 1903 Neoclassical Louis Magaziner - 48 50,000 Riverside New York, New York Charles M. Schwab (demolished in 1948) 1906 Châteauesque Maurice Hébert 38 48 50,000 Hempstead House Sands Point, New York Howard Gould Nassau County, New York 1912 Tudor Revival Richard Howland Hunt - 52 49,951 Chateau Bray Madisonville, Texas James and Sonya Bray James and Sonya Bray (under construction) French Baroque James and Sonya Bray 40 53 49,568 8271 E Left Hand Fork Hobble Creek Springville, Utah Tom Mower Tom Mower Italian Renaissance 41 54 49,300 The Pritzker Estate Los Angeles, California Anthony Pritzker Anthony Pritzker Contemporary Grant Camden Kirkpatrick 42 55 49,000 Ziff Mansion Pawling, New York William Bernard Ziff, Jr. Dirk Edward Ziff 2000 43 56 48,515 50 Poplar Hill Drive Farmington, Connecticut Benjamin Sisti Curtis Jackson 1985 Contemporary 44 57 48,160 Xanadu 2.0 Medina, Washington Bill Gates Bill Gates 1995 Pacific Lodge James Cutler 45 58 47,000 Nemours Wilmington, Delaware Alfred I. du Pont Nemours Foundation 1909 Neoclassical Carrère and Hastings 46 59 46,054 Greystone Mansion Beverly Hills, California Edward L. Doheny City of Beverly Hills 1928 Tudor Revival Gordon Kaufmann 47 60 46,000 Elstowe Manor Elkins Park, Pennsylvania William L. Elkins Dominican Sisters of St. Catherine de ' Ricci 1898 Italian Renaissance Horace Trumbauer 48 61 45,891 457 Bel Air Road Los Angeles, California Beny Alagem Beny Alagem 2006 French Normandy Robert A.M. Stern 49 62 45,854 Villa Collina Moorestown, New Jersey Vernon Hill Vernon Hill 2002 Italian Renaissance 50 63 45,842 Townsend House Washington, D.C. Richard T. Townsend Cosmos Club 1901 Beaux - Arts Carrère and Hastings 51 64 45,000 Yaddo Saratoga Springs, New York Spencer Trask Corporation of Yaddo 1893 Tudor Revival William Halsey Wood 51 64 45,000 Darlington Mahwah, New Jersey George Crocker Ilija Pavlovic 1907 Jacobean James Brite 51 64 45,000 Henry Clay Frick House New York, New York Henry Clay Frick Frick Collection 1914 Beaux - Arts Carrère and Hastings 54 67 44,936 Anderson House Washington, D.C. Larz Anderson Society of the Cincinnati 1905 Beaux - Arts Arthur Little Herbert Browne 55 68 44,925 Le Palais Beverly Hills, California Mohamed Hadid Lola Karimova - Tillyaeva 2011 Châteauesque 56 69 44,309 Glencairn Bryn Athyn, Pennsylvania Raymond Pitcairn The New Church 1929 Romanesque Raymond Pitcairn 57 70 44,234 Villa Vittoriosa Fayetteville, Georgia Evander Holyfield Rick Ross Neoclassical Portman Fuchtman Vinson Sunderland 58 71 44,229 Ochre Court Newport, Rhode Island Ogden Goelet Salve Regina University 1892 Châteauesque Richard Morris Hunt 59 72 44,000 Hyde Park Hyde Park, New York Frederick Vanderbilt National Park Service 1899 Beaux - Arts Charles Follen McKim 60 73 43,793 Boldt Castle Alexandria Bay, New York George Boldt Thousand Islands Bridge Authority 1904 Chateauesque G.W. & W.D. Hewitt 61 74 43,561 Marland Mansion Ponca City, Oklahoma Ernest Whitworth Marland City of Ponca City 1928 Mediterranean Revival John Duncan Forsyth 62 75 43,517 Asherwood Carmel, Indiana Melvin Simon Bren Simon 1999 Chateauesque 63 76 42,831 Château des Fleurs Los Angeles, California James A. Kaplan James A. Kaplan 2014 Chateauesque William Hefner 64 77 42,014 51 Winding Brook Drive Saratoga Springs, New York John Breyo John Breyo 2006 Mediterranean Revival Robert Flansburg 65 78 42,000 Payne Mansion Esopus, New York Oliver Hazard Payne Marist College 1911 Beaux - Arts Carrère and Hastings - 78 42,000 Rose Terrace Grosse Pointe Farms, Michigan Anna Thompson Dodge (demolished in 1976) 1931 Neoclassical Horace Trumbauer 66 80 41,774 Le Palais Royal Hillsboro Beach, Florida Robert Pereira Robert Pereira 2014 Beaux - Arts Denio Madera 67 81 41,050 Carolands Hillsborough, California Harriet Pullman Carolan Charles Bartlett Johnson 1914 Second Empire Ernest Sanson Willis Polk 68 82 41,000 Hayes Mansion San Jose, California Mary Hayes Chynoweth City of San Jose 1905 Mediterranean Revival George Page 69 83 41,000 NYIT de Seversky Mansion Old Westbury, New York Alfred I. du Pont New York Institute of Technology 1918 Georgian Revival Carrère and Hastings 70 84 40,916 Il Palmetto Palm Beach, Florida Joseph E. Widener James H. Clark 1927 Mediterranean Revival Maurice Fatio 71 85 40,280 Walker McCune Mansion Paradise Valley, Arizona Walker McCune George A. Hormel family 1962 Contemporary 72 86 40,000 Mills Mansion Hyde Park, New York Ogden Mills New York State Office of Parks, Recreation and Historic Preservation 1896 Beaux - Arts Stanford White 72 86 40,000 The Braes Glen Cove, New York Herbert L. Pratt Webb Institute 1912 Jacobean James Brite 72 86 40,000 Coe Hall Oyster Bay, New York William Robertson Coe Planting Fields Foundation 1921 Tudor Revival Guy Lowell 72 86 40,000 Bishop Gallagher House Detroit, Michigan Fisher Brothers Bishop Wayne T. Jackson 1925 Tudor Revival McGinnis and Walsh 72 86 40,000 Rynwood Old Brookville, New York Samuel Agar Salvage John Mariani Jr 1927 Tudor Revival Roger Bullard 77 91 39,648 Seaview Terrace Newport, Rhode Island Edson Bradley Martin Carey 1925 Chateauesque Howard Greenley 78 92 39,576 La Reverie Palm Beach, Florida Sydell Miller Sydell Miller 2001 Neoclassical Jeffrey W. Smith 79 93 39,257 Serenity Ridge Parker, Colorado Cal Turner, Jr. Cal Turner, Jr. 2001 Italianate 80 94 38,500 North Wales Warrenton, Virginia William Allison David Ford 1776 Georgian 81 95 38,196 144 Hopewell Road Alton, New Hampshire Bob Bahre Bob Bahre 2003 Georgian 82 96 38,000 Ardrossan Villanova, Pennsylvania Robert Leaming Montgomery Robert Montgomery Scott 1912 Georgian Horace Trumbauer - 96 38,000 Charles Gates Mansion Minneapolis, Minnesota Charles Gates (demolished 1933) 1913 Renaissance Revival 82 96 38,000 Billionaire Los Angeles, California Bruce Makowsky Bruce Makowsky 2016 Contemporary Bruce Makowsky 84 99 37,100 ʻIolani Palace Honolulu, Hawaii King Kalākaua State of Hawaii 1879 American Florentine Thomas J. Baker 85 100 36,957 Arbor Hill Fort Washington, Pennsylvania Dennis Alter Dennis Alter 1998 Contemporary Rafael Viñoly
who owns the biggest house in the united states
William A.V. Cecil