Designed by an English-born Detroit architect who resided in Windsor, Ontario, the courthouse is in the Second Empire style. The seven-bay, two-story courthouse is arranged symmetrically with a pedimented projecting central pavilion containing a two-tiered clock tower with a convex mansard roof. The external walls are limestone from Drummond Island trimmed with Marquette brown sandstone. This impressive heroic courthouse speaks to the confidence and optimism of the citizens of the Sault in the late nineteenth century.