By the turn of the 20th century, Potomac experienced a period of growth. Thomas Perry, an operator of a nearby general store, built a house on the corner of Falls and River Roads in 1902. More residential structures were built on the northern section of Falls Road throughout the 1920s and 1930s. During the 1950s, Potomac was one of many communities in Montgomery County to experience suburbanization. Potomac quickly transformed from a rural farming community to a suburban community from the mid- to late 20th century.