The twenty-two-story Wilco Building was the tallest in West Texas until surpassed by the First National Bank (MT3) in 1978. Abilene architect Dan Boone, a former associate of David S. Castle Company, expanded on the two-tone palette he incorporated in Castle’s Great Plains Life Insurance Company Building in Lubbock (LK9) by sheathing the exterior of the L-plan tower in buff brick and its interior in red brick. Architecturally the Wilco Building is a straightforward modern exposition of its steel-frame construction. It remains one of the leanest and most handsome of Midland’s downtown office buildings. As outmoded office space though, the Wilco Building is threatened.
The four-story, cast-in-place-concrete Cox Building (1979, Frank Welch Associates; 400 W. Wall) is a robust departure from the mid-century curtain walls of adjacent buildings. The thickness of each concrete column and spandrel panel is visible, along with exposed fasteners.