Standing, institutional

Standing Mansions owned by a school, church, government or company. Not open to the general public, though some can be seen from the road or open for occasional events.

Place Find

Brecknock Hall

Institutional Greenport, 1851 to 1857

Brecknock Hall is a stone Italianate house that David Gelston Floyd, a Greenport shipping and whaling businessman and grandson of Declaration signer.
Chelsea

Institutional Muttontown, 1923 to 1925

Chelsea is the Muttontown estate of Benjamin Moore and Alexandra Emery Moore, designed by William Adams Delano of Delano & Aldrich and.
Hillwood

Institutional Brookville

Hillwood is the Tudor Revival country house in Brookville that Marjorie Merriweather Post shared with her second husband, the financier E.F. Hutton..
Idle Hour

Institutional Oakdale, 1899 to 1901

Idle Hour is the brick and stone mansion that William Kissam Vanderbilt built in Oakdale after fire destroyed his first house on.
Killenworth

Institutional Glen Cove, 1913

Killenworth is a Tudor Revival country house in Glen Cove built for George Dupont Pratt, a son of the oil refiner Charles.
Mill Neck Manor

Institutional Mill Neck, 1923

Mill Neck Manor is a Tudor Revival mansion built for Robert Leftwich Dodge and Lillian Sefton Dodge, president of the cosmetics company.
Nassau Hall

Institutional Muttontown, 1903 to 1904

Nassau Hall is a country house in Muttontown that the architects Delano and Aldrich designed for a member of the Winthrop family.
Ormston House

Institutional Lattingtown, 1916

Ormston is a Tudor Revival country house in Lattingtown, designed in 1916 by Bertram Grosvenor Goodhue for the utilities executive John E..
Poplar Hill

Institutional Glen Cove, 1917 to 1924

Poplar Hill is the Glen Cove country house of Frederic B. Pratt, a son of the oil refiner Charles Pratt and a.
Templeton (White Eagle)

Institutional Brookville (on the Old Westbury campus of New York Institute of Technology), 1916 to 1918

Templeton, first called White Eagle, is a Georgian Revival mansion designed by Thomas Hastings of Carrère and Hastings for Alfred I. du.
The Braes

Institutional Glen Cove, 1912 to 1914

The Braes is a Jacobean-style mansion in Glen Cove built from 1912 for Herbert Lee Pratt, a son of Standard Oil founder.
The Chimneys

Institutional Sands Point, 1929

The Chimneys is a Tudor-style mansion in Sands Point completed about 1929 for Bettie Fleischmann Holmes, the widow of the Cincinnati physician.
The Playhouse (Woodward estate)

Institutional Oyster Bay Cove, 1927

The Playhouse was a 1927 recreation building, with an indoor tennis court and a music room, that the architect James W. O'Connor.