This tradition of small, nearly identical row houses reached its apex with a series of developments begun in the 1920s. Over the course of a few decades, several builders, including Carl and Fred Gellert, R.F. Galli, Oliver Rousseau and, most famously, Henry Doelger, converted the area's still vast sand dunes to a residential neighbourhood with the construction of thousands of new homes
. Doelger's development was by far the most massive: between the late 1920s and mid-1940s, his company erected an estimated
11,000 homes in the city; from 1934 to 1941, he was the most prolific home builder in the country
. Doelger houses were an early example of assembly-line building on small lots, yielding affordable, well-crafted, single-family homes designed to meet Federal Housing Administration standards
. Though the
façades vary, borrowing traces of Spanish and American colonial, French provincial or modernist traditions, they are united in appearance by their stucco exteriors, equal size and a consistent layout that features bay or picture windows over the centrally placed garage
. Just as in post-war suburbia, model homes were built to solicit buyers. Doelger occasionally marketed these sites with contests, such as a 1942 promotion that linked domestic consumerism with patriotic duty: participants were instructed to visit the 'Freedom House' and submit their response to the prompt 'I am glad to be an American because…' for the chance to win $75 in US defence bonds
. Moreover, such suburban resonances were not simply a matter of architectural appearance or the common equation of home purchases with nationalist pride; both Doelger and the Gellert brothers' Standard Building company included racial covenants in their property deeds, resulting in a population that was, like much of post-war suburbia, overwhelmingly white
.