The Spirit of the Lord was moving in the hearts and minds of people like Rev. Harlan Roelofs, the first board president, and Mrs. Dora Smits, who donated the ten acres of land on which the new school was built late in 1963. The name "Unity" was chosen to represent the cooperation of Christian educators and other Christians throughout the Siouxland area in their move to extend the opportunity of Christian education to more and more people. The site of the land on the west edge of Orange City was ideal for both its accessibility to students and its potential for expansion. In fact, additional land was soon donated, making possible the addition of a gymnasium.

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In the 1968 Spring Society Meeting, the Society voted to build a gym, which could be used for athletic practice, physical education, intramurals, assemblies, and various other school functions. Included in the addition were a second story small classroom, practice rooms, and a large room for the music department.

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By 1970 it had become obvious that additional classrooms were needed. The following summer, two "temporary" steel classrooms were purchased from the M-OC School District and moved to the Unity campus. These buildings were removed during the summer of 2002, and a new addition was constructed for maintenance and storage.

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Construction on the present gym was begun in August of 1975.  The old gym was remodelled into a music room, cafeteria and full kitchen for beginning a food service program for both Unity and Orange City Christian School. The former second story music room became a needed classroom.

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Construction in April 1985 added a 2300-square foot science laboratory/classroom. In addition 40 acres of cropland were purchased permitting control over the immediate acreage surrounding Unity.

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In 1994 a 12,000-square foot addition was attached to the north and east of the present structure, as well as remodeling the entire office area. The addition included two computer labs, an art room, four classrooms, counseling office, restrooms and additional space in the library.

 

In the summer of 1999 a new soccer/athletic field was dedicated on the south end of the property. In 2004 a football storage unit was attached to the bus garage. New boilers were installed in 2005, and a concession stand with restrooms was constructed near the soccer/football field during 2006. The bleachers in the gym were replaced during the summer of 2007. A master plan of the campus projecting future expansions has been developed. Construction was completed in the fall of 2013 for the Unity Christian Performing Arts Center/Chapel and Courtyard.