He is best known for the design of John Shaffer Phipps' (the heir to a U.S. Steel Magnate fortune) home, Westbury House (built 1904–10; additions constructed in 1915–16), at Old Westbury Gardens, in Long Island, New York.
Royal Botanic Gardens, Kew | Kew Gardens | Westbury | Maple Leaf Gardens | Tivoli Gardens | Sir Harold Hillier Gardens | Royal Botanic Gardens | Better Homes and Gardens | The Gardens | The King of Marvin Gardens | Shalimar Gardens | National Council for the Conservation of Plants and Gardens | Kew Gardens, Queens | Better Homes and Gardens (magazine) | Victory Gardens Theater | Westbury, New York | Grey Gardens | Eden Gardens | Botanical Gardens | Westbury-on-Trym | Vauxhall Gardens | The Gardens, Northern Territory | Royal Botanical Gardens | Miami Gardens, Florida | Marcus Westbury | Kensington Gardens | Forbury Gardens | Cypress Gardens | botanical gardens | Australian National Botanic Gardens |
Because Crawley was not formally trained as an architect, the Phipps family contracted with Grosvenor Atterbury to work with Crawley on technical aspects of designing the new home, which was named Westbury House (now Old Westbury Gardens).