South Arlington is the portion of Arlington County south of Route 50, anchored by neighborhoods like Fairlington, Shirlington, Columbia Pike, Penrose, and Barcroft. The housing stock here is notably older: Fairlington's townhouse-style condominiums were originally built in 1944, and much of the Columbia Pike corridor features Cape Cods, bungalows, and small single-family homes from the postwar era. These mid-century homes were designed with smaller rooms, single bathrooms, and kitchens that were separated from living areas, which creates consistent demand for interior renovation work. The density of South Arlington also means parking and staging access can be tighter than in suburban areas, so planning the work sequence matters.