St James Garlickhythe is in the shape of a rectangle, with the tower adjacent to the West and a protruding chancel (uniquely for a Wren church) projecting from the East. It is built from brick and Kentish ragstone, partly stuccoed, partly faced (since World War II) with Portland stone. Entrance is through a pedimented doorway with a cherub keystone in the tower, which is flanked by pairs of round headed windows in the west wall. Above is a recessed clerestory wall joined to the tower by semi-rounded pediments.