John Loomis moved with his family to Jeffersonville, Indiana, where they stayed until about 1910, when they moved to Louisville.
Loomis married Carrie Dorsey, of Jeffersonville, IN on December 9, 1902.
The couple's union produced no children.
He died in 1935 at the Kentucky Baptist Hospital of a heart attack and is buried next to his wife in the prestigious Cave Hill Cemetery.Loomis was a Mason and member of the Shrine.
In addition to his position with Clarke & Loomis, he was an associate architect with the Southern Baptist Theological Seminary.
Additionally, he was considered the first president of the Kentucky Chapter of the American Institute of Architects.
Although his former partner Charles Clarke was elected, he died before taking office so Loomis fulfilled his term.