In 1936, Frank Lloyd Wright’s first Usonian house – the Jacobs House – was completed outside Madison, Wisconsin. The Jacobs House would later serve as the basis of the Rosenbaum plan, with its 2’ x 4’ planning module, L shape, and private areas pushed to the ends of the plan. Additionally, with a construction cost of only $5,500 the house would become a model for affordable designer houses.
In 1939, Stanley Rosenbaum, a professor at the University of Northern Alabama, and his wife Mildred, contracted Cooper Union architecture student Aaron Green to design a residence in Florence, Alabama. When Green delivered the plans in April of that same year, the estimated cost was well over the desired $7,500 maximum price, so Green (who greatly admired the design and low cost of the Jacobs House), recommended Wright as an alternative architect.
By August 1939, the Rosenbaums had contacted Wright asking for a house with 3 bedrooms, 2 bathrooms, a large kitchen with service entrance and pantry, a study, and a living room large enough for many books, piano, organ, and radio-phonograph. Wright's plans were soon accepted and construction began in January 1940, to be completed by August.
The original plan called for a single story home that met the Rosenbaums' desired layout and cost, at 1540 square feet and $7,500 projected. By its completion, the Rosenbaum House would cost a total of $12,777.84.