A 2005 Old House Journal piece about post-war modern housing highlights D.C. as an area that has a number of such developments, including Hollin Hills and Holmes Run Acres. Here’s the excerpt:

“Near Alexandria, Virginia, just south of Washington, D.C., is another successful Soft Modern development, the woody suburb of Hollin Hills. Built by developer Robert Davenport, with houses designed by architect Charles Goodman, Hollin Hills grew to include 450 houses spread over 225 acres. The project benefited enormously from the landscaping advice supplied to early owners by landscape architect Lou Bernard Voight. After Voight’s death, another noted landscape architect, Dan Kiley, took over the landscape planning for Hollin Hills. Similar developments can be found all around Washington. One of the best, Holmes Run Acres in Fairfax County, was designed by the Washington architectural firm of Nicholas Satterlee and Donald Lethbridge.”