A December 1949 aerial view of the sprawling Long Island development. It would be the largest of three Stateside Levittowns. In order of their completion, they were in New York (1947-1951), Pennsylvania (1952-1957) and New Jersey (1958-1972). A fourth would be built outside San Juan, Puerto Rico (1963-1987).
Photo from http://www.longislandmemories.org

The three Manhasset men who formed Levitt & Sons in 1929. From left-to-right, they are William (1907-1994), Abraham (1880-1962) and Alfred (1912-1966). William, known as the Henry Ford of Housing, served as the head of the company. Alfred designed early Levittown homes and layed out street plans for the New York and Pennsylvania projects.
Photo from http://www.longislandmemories.org

The first Levittown model, known as the Cape Cod Type 1 "Lookout" (1947-1948). This dwelling came complete with a General Electric refrigerator, Hotpoint electric range and Bendix automatic washer. The second Levittown New York model, known as The Ranch (1949-1951), even included an Admiral television set!
Drawing from http://www.longislandmemories.org

At the first Levittowns in New York and Pennsylvania, one standard home model was duplicated along a street of a development. In this view, we see the Cape Cod model and its variations...from left-to-right are the Type 2 "Mariner", Type 1 "Lookout", Type 5 "Snug Harbor" and Type 4 "Green Hills." 
Photo from http://www.longislandmemories.org 

 

Homes of the five-model Ranch series were more moderne than their Cape Cod counterparts.
Drawing from https://www.archdaily.com / The Evolution of the House Plan In the United States.