Episcopal services in the village of Farmington were first held in an old schoolhouse in 1873, when St. James’ Mission was established under the leadership of Rev. Edward R. Brown, Rector of Christ Church in Unionville, and Charles L. Whitman, a Farmington innkeeper. By late 1874, the mission had moved to the second floor of a grocery store and post office on Main Street near Mill Lane. Whitman died in 1886 and left money for the erection of a church. The mission raised additional funds and acquired land for the church on Mountain Road in 1897. The Arts & Crafts-style structure was designed and built by Henry Hall Mason, whose father, Charles S. Mason, was a strong supporter of the mission. Mason used local field stone in the construction and also made the church’s wooden altar and reading desk using wood from his own property. The first service in the new building was held in January 1899 and the church was consecrated five months later. The mission was formally recognized as St. James Parish in 1902. An addition to the rear was built in 1910 to provide a larger chancel and organ loft. Two further additions were a new parish house in 1938 and a parish hall, designed by Edgar T. Glass, in 1957. That same year, a belfry was also constructed.