In addition, Taylor & Mathis ground leased 20 acres in the park for various commercial uses, including branch banks, hotels and free-standing restaurants.

While DeKalb County threatened to sue Dunwoody over the inclusion of Perimeter and its large tax base in the new city, the lawsuit never came to fruition.

[4] The area is home not only to the strip malls that are typically built near major indoor malls, but also many office parks that contain high-rise office buildings, including skyscrapers that house the world headquarters of United Parcel Service (UPS), AT&T Mobility, Cox Enterprises, Haverty's and Newell Rubbermaid.

Pill Hill — nicknamed for its cluster of hospitals and doctors’ offices — is located near the intersection of Georgia 400 and Interstate 285, on the Sandy Springs side of Perimeter.

Pill Hill has grown exponentially since it began taking shape in the late 1960s when Scottish Rite, which was previously a children’s convalescent home, expanded into a full-fledged medical center in 1965.

MARTA's Red Line has three stations in the area: Dunwoody in DeKalb County, which services Perimeter Mall, Sandy Springs station in Fulton County, located under one of the busiest intersections in the area, and the line's northern terminus at North Springs, servicing the Georgia 400.

A further extension that has been studied but not planned is up the 400 corridor to Alpharetta, the location of another edge city about 10 miles (16 km) or 16 kilometers to the north-northeast.

The Atlanta Regional Commission has this in long-term plans, along with an east/west light rail route along the Perimeter, going west to Cumberland (about 9 miles (14 km) or 15 kilometers west-southwest), and east to Doraville to meet with the Gold Line.