D.C. law firms have been migrating in droves from one Northwest downtown neighborhood to another, much like the pioneers of 150 years ago moved west. This movement, though, is in the opposite direction: In recent years, nearly half of the top 50 law firms in the District have built offices and fortunes in downtown’s East End.

Traditionally, the K Street Corridor was the seat of power for lawyers and lobbyists in Washington. In its heyday, in the late 1970s and 1980s, the seven blocks between 15th Street and 22nd Street were home to many of the most prominent firms in the city. However, the buildings there began to age and were not large enough to offer expansion opportunities for the growing legal industry. A new home was needed.