In 1968 the Methodist Church at large and the Evangelical United Brethren Church united, representing the largest church merger in the history of the United States.  A religious body of over 11 million members was created and Central Methodist Church became the Central United Methodist Church we know today.
A task force was established to begin the study of Central's long range needs, using the same foresight and wisdom demonstrated by the church planners of the 1950s. An expansion fund was created to enable people to make bequests, special gifts, memorials and general contributions to a building fund.

By 1977, the long-range planning task force realized that CUMC needed more space. That $952,000 addition completed the reality envisioned by the original planners of the church building. During construction, the stained glass windows from the Central and Arno church were discovered in the boiler room - underneath cases of coke. They were refurbished and reused in the Social Hall.