Winston and Judy Sullivan moved to Cass County in 1971, settling in Linden, Texas, and creating the start-up Sullivan Builders, Inc. Recognizing the need for quality housing in rural East Texas, Sullivan Builders and Design Group began designing and constructing single-family homes as new housing programs were developed.
Throughout the 1980s and early 1990s, the company expanded its reach, constructing senior citizen and multi-family housing across Northeast Texas, West Texas, and the Panhandle. With the expansion of construction and development, the business began to prosper.