The first church was built in 1847 on a site that was the Kenneth Sweeney homestead which was once part of the Garret Fitzgerald farm. The first parish members gathered in Michael Sheehan’s log cabin for services during the winter months. A fire destroyed the log church in 1866. While the men from the surrounding farms were rebuilding the church, Michael Sheehan was killed by a falling beam. The present brick church was completed in 1867.

Built of cream city bricks, Holy Assumption is a very simple structure. Four gothic shaped windows of plain glass set in small square panes let in the light on each side of the church while two windows flank the entrance. A louvered bell cupola is topped by a small steeple. Inside, the walls are painted off-white and the pews, woodwork and waist-high wainscoting are pale beige. Six kerosene lamps with fuel visible in the bases are set in black wrought iron brackets fastened to the window frames. A winding staircase at the rear of the church leads to a choir loft. The apse, a vaulted recess containing the altar, is wallpapered in an intricate green, gold and ivory pattern. There are 26 pews for the approximately 100 families who were members in the church’s early years.