Ten Hills was conceived to be a secluded community made up of a diversity of early 20th century housing styles, including Colonial Revival, Arts and Crafts, Greek Revival, Dutch Colonial Revival, Spanish Mission Revival, and Sears and Roebuck kit homes. These were located in a natural setting, with many being designed by local, well-known architects. Steffey and his team worked closely with new lot owners, their architects, and their builders to ensure the character and aesthetics of the community were maintained.
Over the ensuing decades, the neighborhood continued to be developed. Each decade brought with it new residents with changing needs and tastes. However, the architectural diversity and natural landscaping continued to be a defining characteristic.
Ten Hills was officially designated a Baltimore City Commission for Historical and Architectural Preservation (CHAP) historical district on July 17, 2001.