The library was built in 1972 with a Federal grant. It was dedicated as the Sarita W. Johnston Memorial Library May 28, 1975. Mrs. Johnston was a longtime beloved teacher at Lamar.
In 1993, Scoggins Construction added on classrooms in front of the old entrance. The bookroom, teacher lounge and media center were part of this construction.
In 1998, Peacock construction made the front entrance look like it is today. They enclosed the walkways and renovated the cafeteria and stage.
In 2002, the music room was added.