'Muttontown Meadows', originally the Bronson Winthrop estate designed by Delano & Aldrich c. 1903 in Muttontown. Winthrop had D&A design him another house down the road in 1910 at which point he gave this house to his brother Egerton. Click HERE for more on 'Muttontown Meadows' and HERE to see it on google earth.
Pictures from American Architect & Architecture. 
'Nid de Papillon', the Robert Appleton estate designed by Frank Eaton Newman c. 1917 in East Hampton. Click HERE for more on 'Nid de Papillon'.
'Clayton', originally the Stephen Lloyd Bryce estate designed by Ogden Codman Jr. c. 1901 in Roslyn. The house was later purchased by Childs Frick, son of Henry Clay Frick of Carnegie Steel. Today the home operates as the Nassau County Museum of Art. Click HERE for more on 'Clayton'.
Pictures from American Estates & Gardens.
'Harbor Hill', the Clarence Mackay estate designed by McKim, Mead & White between 1899-1905 in Roslyn. Mackay was chairman of the board of the Postal Telegraph Cable Co., president of the Commercial Cable Co. and Commercial Pacific Cable Co. and held numerous other positions with other companies. He was also chairman of the board of the Philharmonic Society and St. Vincent's Hospital in NYC. Click HERE for more on 'Harbor Hill' (including pictures of the estate grounds and outbuildings) and HERE to see where 'Harbor Hill' stood on google earth (demolished in 1947). 
Pictures from American Estates and Gardens.
The superintendent's residence to 'Westbury House', the Jay Phipps estate in Old Westbury. Phipps had James O'Connor either design an entirely new house or enlarge a quaker farmhouse towards the southern end of the estate c. 1919 for his superintendent. Click HERE to see where the super's residence stands on google earth.
Pictures from Architectural Review, 1921.
The Camellia House at William R. Coe's 'Planting Fields' in Oyster Bay, designed by Guy Lowell between 1917-22. This was also closed last year for restoration work but was recently reopened. Click HERE for more on 'Planting Fields'.
The Italian Blue Pool Garden and tea house, designed by Guy Lowell and Andrew Sargent between 1915-18 at William R. Coe's 'Planting Fields' in Oyster Bay, now complete after undergoing a few years of restoration. While the general public is not allowed inside you can still walk around the perimeter and get a good look. Click HERE for more on 'Planting Fields'.
Two close-ups of the ruins of 'Meudon', the William D. Guthrie estate designed by C.P.H. Gilbert c. 1900 in Lattingtown. Click HERE for more on 'Meudon'. Photos by James Hogarty.
A view from the beginning of the hill at 'Spring Hill', originally the William L. Stow estate and later the Henry Carnegie Phipps estate designed by John Russell Pope c. 1903 in Old Westbury. You can just see the roofline of the stable and two of the greenhouses peaking out through the trees. Click HERE for more on 'Spring Hill'. Click HERE to visit the website for the 'Spring Hill' subdivision.
Two pictures of the gardens of 'Manor House', the John Teele Pratt estate designed by Charles Platt c. 1909 in Glen Cove. These shots are of the area where they installed a swimming pool later on (in place of the fountain). Click HERE for more on 'Manor House'.
Pictures from Beautiful Gardens in America, 1915.
Recently uncovered from a couple of decades of unabated plant growth are the greenhouses to 'Welwyn', the Harold I. Pratt estate in Glen Cove. The main house was originally designed by Babb, Cook & Willard c. 1906 but Delano & Aldrich gave the house an extensive makeover in the 1920s. Click HERE for more on 'Welwyn'. The weeds around the greenhouses were cleared to create the 'Welwyn Farms Project', a future sustainable farm helping to feed the hungry. Click HERE to visit the 'Welwyn Farms Project' website. Click HERE to see the greenhouses on bing.
The path that leads down from the house to the greenhouses.
The estate of Charles Steele (originally built for J.F.D. Lanier) built by James Brown Lord c. 1891 in Old Westbury. Steele gave the house an extensive renovation after he purchased it from Lanier. Steele was a partner in the law firm of Seward, Guthrie, Morawetz & Steele. He was also a partner at J.P. Morgan and Comapny. Click HERE for more on the estate and HERE to see where it would have stood on google earth (it was demolished c. 1950).
Some interiors from 'Knole', the Herman Duryea estate designed by Carrere & Hastings c. 1903 in Old Westbury. Click HERE for more on 'Knole'.
Pictures from American Estates & Gardens, 1904.
From this weekend's New York Times Real Estate section, an article on a couple of Long Island's film friendly residences. Above and below is Debbie Regan's 1907 Old Westbury colonial on Wheatley Road, featured prominently in the article. It was most recently used for the filming of 'The Oranges' starring Hugh Laurie. Ever since I was a little kid I remember this house being used for tv shows and movies. Frank W. Woolworth's 'Winfield Hall' by C.P.H. Gilbert in Glen Cove is currently being used for the filming of 'Mildred Pierce', an HBO miniseries with Kate Winslet that will premiere next February.
A Lord & Burnham Co. advertisement for the glass enclosed palm garden at 'Pembroke', the Joseph R. DeLamar estate designed by C.P.H. Gilbert c. 1916 in Glen Cove. Click HERE for more on 'Pembroke'.
The stable to 'Knole', originally the Herman Duryea estate designed by Carrere & Hastings c. 1903 in Old Westbury. The stable suffered a major fire about ten years ago and the surrounding property has since been subdivided. Click HERE for more on 'Knole'.
