St. Andrews United Church

• its location on the west side of Gillis Street, across from one of the early Garson-area quarries
• the church's east-west alignment, facing east, within a small grassed lot with front shade trees

Key exterior elements that define the building's outstanding limestone construction and fine craftsmanship include:

• its simple one-storey rectangular form with a steeply pitched gable roof, exposed wooden eaves and massive stone walls
• the small front entrance porch with a gable roof that matches the slope of the main roof
• the exceptional stonework, including rusticated, random-laid limestone walls and sills contrasted by smooth-cut stone window heads, a hood-mould with grotesques above the entrance transom, a cornerstone inscription (northeast corner) and a short stone chimney
• Gothic Revival features such as the pointed arch around the entrance, the three-part, clear and obscured-glass windows with upper Y-tracery, etc.

Key elements that define the simple yet finely finished interior include:

• the largely unaltered spaces of the small front vestibule and high open nave with a truncated ceiling
• fine materials and finishes such as the richly stained tongue-and-groove boards that cover the ceiling and walls of the nave and vestibule, the nave's double wood doors, the fir flooring, pendant light fixtures, etc.