The two-story portico facing Broad Street was the first of its size in colonial America and features Tuscan columns.

[6] Between 1754 and 1760, £1000 worth of architectural carving was done by Charleston artisan Henry Burnett, including ovolo moldings, seventy-two modillions for a Corinthian entablature for the facade, fifty-four double flowers for the portico, and a large “foliage flower” in the center of the ceiling.

[9] Another stained glass window is located in the chancel and depicts St. Michael conquering Satan; it is based on a work in the Louvre by Raphael.

The location had originally been a window, but the opening was enclosed in 1788 to prevent the spread of fires from adjacent buildings.

St. Michael's Churchyard, adjacent to the church, is the resting place of some famous historical figures, including two signers of the U.S. Constitution.

In June 2017 the diocese, and by extension St. Michael's, were received into the Anglican Church in North America.

[12][13][14][15] The church houses a clock and change ringing bells dating from colonial times.