The Dexter Universalist Church stands in Dexter's town center, at the northeast corner of Hall Street and Church Street (Maine State Routes 7 and 23). It is a two-story wood-frame structure, with mostly clapboard siding and a front-facing gable roof. In front of the main block is a projecting hip-roofed and flush-boarded vestibule area, from which a multi-stage square tower rises to a belfry and steeple. The vestibule is three bays wide, with narrow segmented-arch windows on either side of the entrance, which is set within a large segmented-arch opening at the front of a projecting gable-roofed section with a dentillated cornice. The interior walls and ceiling of the main sanctuary are finished in pressed metal.[2]
The main body of the church was built about 1828–29, but most of the building's styling comes from a major renovation conducted 1867-70 from a design by Boston architect Thomas Silloway. Although Silloway (probably best known for his design of the Vermont State House) was a prolific church designer, this is one of only three relatively unaltered instances of his work left in the state of Maine.[2]