The architectural firm, whose notable projects include NorthPark Center, One Arts Plaza and A.H. Belo Corp.'s headquarters, is aiming to eliminate the building's 1980s-esque look by adding “crisp, clean” new lines.

While reps for Gaedeke did not return a phone call for additional comments, the lobby will be expanded by more than 3,000 square feet and the ceiling height will be raised to 25 feet; exterior walls redressed with a 25-foot full-height glass curtain wall; and the interior will be transformed with white marble walls and basalt stone floors. Other aspects: commissioned artwork, a high-tech security desk, WiFi furniture and an updated three-level parking garage.

Oak Lawn Plaza, completed in 1983, was designed by Phillip Shepherd of Shepherd & Boyd Architects, whose work includes Dallas landmarks such as the Mansion on Turtle Creek and The Crescent.

"Oak Lawn Plaza is a fairly complicated form," Dilworth says. "We wanted our intervention to be as simple as it could be, to be compatible with the existing building.”