Case Study House #20 was the only house of the program to anticipate the changes in lifestyle and growth of the young family who were to be its inhabitants. Richard Neutra’s highly organic original design easily accommodated the three additions he would oversee in subsequent years. These additional bedrooms and living spaces retained the same characteristics of Neutra’s early iteration, yet provided the extra space which the young doctor’s family needed. The home was constructed of materials typical to Neutra in this later phase of his career including glass, steel, and wood in an L-shaped plan with a low-slung roof. Large sliding glass walls in the back of the house opened up the bedrooms and public rooms to the garden area; a feature important to Neutra and typical of houses in the Case Study program.