The oldest known record of the Church of England parish church of St Leonard is from 1246. The nave and parts of the chancel date from this time, and there is one blocked 13th-century window in the south wall of the nave. The east end of the chancel was rebuilt late in the 13th or early in the 14th century with a Decorated Gothic east window. Late in the 15th century the Perpendicular Gothic south transept and north tower were built and the nave was given Perpendicular Gothic windows and an embattled parapet. The Elizabethan polygonal west porch with Ionic columns is said to have been given by John Jewel, Bishop of Salisbury, who had been rector of Sunningwell St Leonard's in about 1551.