The cornerstone for the current St. Thomas Church building was laid on 12 August 1891 at an event that had an estimated 1,000 attendees.

Although the construction period spanned from 1 May 1891 until December 1892, the first Mass was nevertheless held in the basement of the church on Christmas Day in 1891.

[3] The previous wooden church had been constructed with hired and voluntary labor during 1854–55 to serve a majority populace of 63 Irish immigrant farming and logging families.

By October 1890, the pastor Father James D. Shannon (1861–1936[4]) had thoroughly renovated the church and made a number improvements, including; the excavation of a cellar underneath, the addition of a west wing, as well as heating apparatus, sanitary plumbing, and sewage facilities.

[3] Under the leadership of Father Shannon, services were temporarily moved to the then unused Green Mountain Academy, and plans for a new church were implemented with a "generous response" from parishioners.

The location for the new building on the church's property required the removal of thousands of yards of earth from a bank toward the rear of the site, using a pick and shovel technique, and carting away soil by wagon; a task that was not fully completed until 1898.

Coordinated train and (horse-drawn) carriage transportation for the event was arranged for attendees from Barre, Montpelier, and Burlington.

In 1942, the pastor (Father Joseph Dussault) refurbished the Sacristy altar and had a steel-reinforced cement foundation constructed underneath that area of the building.

[8] The report further illustrates the church's architectural features; "Raised granite foundation and water table; basement level windows have segmental arches linked by a projecting brick lintel course.