Ainon Welsh Baptist Chapel was built in 1828, and rebuilt/modified in 1880. It is in the sub-Classical style, with a rendered and whitewashed exterior with rusticated quoins. It is of the gable entry type, with a small central door flanked by two tall round-arched paned windows, and topped by a small plaque bearing the church name, and a small paned round-arched window. The side elevations each have two tall round-arched windows. The pitched roof is of Welsh slate with slightly overhanging eaves and crested ridge tiles.
